Measurement of both gas and liquid velocity profiles for bubble-induced turbulent flow

Size: px
Start display at page:

Download "Measurement of both gas and liquid velocity profiles for bubble-induced turbulent flow"

Transcription

1 Measurement of both gas and liquid velocity profiles for bubble-induced turbulent flow H. Takiguchi 1*, M. Furuya 1, T. Arai 1, T. Kanai 1 1: Central research institute of electric power industry (CRIEPI) * Correspondent author: t-hiro@criepi.denken.or.jp Keywords: Laser Doppler velocimetry, Wire mesh sensor, Bubbly flow, Velocity, Gas density dependence ABSTRACT To understand the forces acting at the interfaces of a bubble under high pressure and temperature in a nuclear reactor, detailed velocity profiles of both gas and liquid phases are important. However, direct numerical simulation (DNS) requires vast time and memory space to resolve them in phasic interfaces, so the experimental approach is still crucial in multi-dimensional two-phase flow simulation. In this study, a novel technique to measure gas and liquid velocity profiles using laser-doppler velocimetry (LDV) and wire mesh sensor (WMS) has been developed. In this paper, we focused on the effect of gas density dependence on a two-phase velocity field, since gas density of water vapor at high pressure and temperature is widely different from that in the atmosphere. To make a detailed correlating equation using the drift-flux model, taking into account the effect of gas density, the gas density dependent data of void fraction, gas velocity, liquid velocity and its fluctuation in one-dimensional vertical direction were measured with helium, nitrogen, air and argon. Each gas, with differences of up to approximately 10 times, was selected to simulate change of gas density caused by change of temperature and pressure. A vertical rectangular test loop 200 mm wide 30 mm deep 800 mm high was fabricated to allow laser beams to access the test section, and to simulate the 2-dimensional case in which bubble motions in the depth direction are inhibited to simplify complicated turbulent behavior. The experiment targeted bubbly flow with uniform and trans-mutative bubbles (apparent diameter: 3-5 mm). From the measured data, the negative trend that gas drift velocity shifted closer to liquid phase velocity with increasing gas density was indicated. Besides, it was confirmed that this mutual trend was the same in all conditions of total volumetric flux. Finally, the void fraction dependence of gas drift velocity was compared with the drift-flux model. While this model indicates that gas density has little effect on gas drift velocity, the experimental data suggested the existence of gas density effect. It can be considered that a change of relative frictional forces is generated in phasic interactions due to bubble deformation undefined in the drift-flux model. For this reason, it was revealed that gas density gives non-negligible effect on velocity field in bubbly flow involving bubble deformation. 1. Introduction Direct Numerical Simulation (DNS), which can be regarded as a numerical experiment, has been yielding a solid numerical database for single-phase flow (of gas or liquid).

2 Applicability of DNS for gas-liquid flow is limited to a simple flow structure such as a stratified flow or a single bubble in a liquid column, since DNS requires vast time and memory space to resolve phasic interphases for three dimensional thermal-hydraulic analysis of a boiling water reactor (BWR)[1,2]. Therefore, experimental methods are yet crucial to explore the interfacial structure [3-7]. For instance, Prasser et al. [8] have developed the Wire-Mesh Sensor (WMS) to acquire the cross-sectional profile of void fraction and one-dimensional bubble velocity. In order to evaluate computational multi-fluid dynamics (CMFD) for two-phase turbulent flow from the experimental approach, three-dimensional liquid-phase velocity vector and turbulent property must be determined for not only the gas phase, since the liquid-phase momentum is much larger than that of the gas-phase. Laser-Doppler Velocimetry (LDV), which is a non-intrusive measurement method, has been able to quantify the liquid-phase velocity vector and turbulent property at high temporal and spatial resolutions. The drawback of LDV is the scattering of light on the gas-liquid interface due to the difference of the reflective index of light. The goal of this experimental study was to investigate combined methods to balance the pros and cons of WMS and LDV to measure the velocity profile of both phases. In this paper, we focused not only on developing measuring technique, but also on the gas density effect of a twophase velocity field at gas-liquid interfaces in order to clarify forces acting on bubbles with change of pressure and temperature. In a nuclear reactor under high pressure, this force has been calculated by a correlating formula using water and air [9]. However, since the density of vapor differs extremely from that of air under high pressure, understanding the gas density dependence of forces acting around bubbles is important. This experiment demonstrated gas density effect on a two-velocity field of two-phase flow from measurement of gas velocity, void fraction, liquid velocity and its fluctuation in a 1D-vertical direction. 2. Experimental techniques The WMS is able to measure void fraction, three-dimensional gas-phase velocity vector and bubble size distribution by detection of a bubble with an electric potential of wire [10]. LDV is applicable to measurement of liquid-phase velocity by frequency gap sensing of scattered light received from sub-micron tracer particles with approximately the-same density as water, such as nylon and silver-coated midair glass beads, which are passed through fringe spacing patterns induced by two laser beams of each equal wavelength and intensity.

3 Fig. 1 Experimental apparatus with rectangular test section. (a) (b) 20 mm Fig. 2 Snap-shot of air and water near the measuring point in the test section; (a) j L=0.131 m/s, jg=0.028 m/s and (b) jl=0.052 m/s, jg=0.017 m/s. The experimental apparatus applicable to the above-mentioned measuring techniques will be introduced. The test section in Fig. 1, made of acrylic resin to visualize and measure twophase flow, is a rectangular channel 0.8 m long, 200 mm wide and 30 mm deep, in order to allow laser beams accessing into the test loop and assumes the 2D case in which bubble motion in the depth (y) direction is inhibited to simplify complicated turbulent behavior. WMS and LDV

4 measurement and visualization with high-speed digital video camera (HSC) of two-phase flow were employed at 0.7m above the mixing area. The tetragonal snap shot of bubbly flow in the inlet superficial liquid velocity j L=0.131 m/s, gas velocity j G=0.028 m/s and j L=0.052 m/s, gas velocity jg=0.017 m/s are illustrated in Fig. 2. It was confirmed that 2D-assumed and approximately-4 mm-uniform bubbles were transformed and rose as shown in these snap shots. Liquid and gas phases in the test loop are water and air at room temperature and atmospheric pressure. Liquid was supplied from the pump and flowed in an upward direction, gas was fed into single-phase flow through a horizontally long air injector, which was selected to make bubbles flow uniformly in a cross-wise direction. Wire electrodes for WMS -measurement made of 250 µm-stainless steel were utilized as transmitter and receiver electrodes, and the WMS had 576 points (9 64 points) for local measurement regions to be able to measure velocity vector profiles. The axial distance between transmitter and receiver wires was 2.5 mm, and the pitch of both transmitter and receiver wires was 3 mm. Additionally, another WMS measuring section was installed with a 30 mm gap to measure gas-phase velocity vector by detecting time delay of the gas-phase behavior between the pair of WMS with cross-correlation. Our target in the experiments was the quantitative-comparison of 2D-9 64 matrix distribution data with CMFD using experimental data with void fraction, gas-phase velocity vector, bubble size, liquid-phase velocity vector and turbulent properties. In this experiment, as a part of our aim, in order to demonstrate the verification of this combined-measurement method and to elucidate gas density effect of a liquid and gas velocity field, we measured time-averaged liquid-phase velocity and root mean square (RMS), gas-phase velocity and void fraction in 1Dvertical direction at the voluntary measuring point while changing gas density from kg/m to kg/m Results and discussion In this experiment, we targeted the bubbly-flow, which is moved upward twodimensionally with approximately uniform 4 mm bubbles, the void fractions measured by WMS were less than those of the homogeneous model (HEM) due to gas velocity drift as shown in Fig. 3. Then, since each inlet superficial gas-phase volumetric flux with four types of gases used in this experiment was regulated to be roughly the same by adjusting from density and specific heat of each gas to investigate only the effect of gas density on the velocity field, void fractions acquired by WMS were also indicated to be approximately equal as shown in 20 mm 20 mm

5 tetragonal snap shots of Figs. 2 and 4. Inlet flow rate (total volumetric flux) was set from m/s to m/s. Fig. 3 Flow regime: bubbly flow, comparison of time-averaged void fraction between measurement values of WMS with homogeneous model (HEM). (a) (b) 20 mm Fig. 4 Snap-shot of argon near the measuring point in the test section; (a) jl=0.131 m/s, jg=0.028 m/s and (b) jl=0.052 m/s, jg=0.017 m/s. Table 1 Gas density (unit: kg/m 3 ) [11]. Air Helium Nitrogen Argon In order to indicate the measurement verification of the two combined methods, we compared the time-averaged void fraction, gas velocity, liquid velocity and its fluctuation in 1D-

6 vertical direction with changing gas density in helium, nitrogen, air and argon in Table 1. The relationship of liquid velocity with gas drift velocity regarding gas density dependence at the Fig. 5 Relationship of time-averaged data between gas-phase velocity and liquid-phase velocity with helium, nitrogen, air and argon. Fig. 6 Time-averaged liquid-phase velocity of helium, nitrogen, air and argon.

7 Fig. 7 Time-averaged fluctuation (RMS) of liquid-phase velocity of helium, nitrogen, air and argon. Fig. 8 Time-averaged gas-phase velocity of helium, nitrogen, air and argon. Fig. 9 Correlating equation line with gas velocity trend data (Fig. 8) and drift-flux model regarding drift velocity versus void fraction measured by wire mesh sensor. measuring point was demonstrated through the liquid-phase velocity data by LDV and the gasphase velocity data by WMS. The time-averaged velocities (ul) and root mean square (RMS, ul-rms) were worked out with LDV for data of 50,000 liquid-phase velocities in the vertical direction; this data included only extracted velocity information fed by supplied tracer, without that caused by gas-liquid phasic interactions. Additionally, the data (WMS) of 10,000 one-dimensional gas-phase velocities and void fractions, which were gained at 1000 Hz for 10 seconds, were calculated as time-averaged velocities (ug) and void fraction (α). The reliability of LDV measurement values was confirmed

8 with single liquid-phase flow, then the measured values were well accorded with ±10 % from those of the readings in the range of superficial liquid-phase volumetric flux from 0.05 m/s to 0.3 m/s. In comparison with liquid-phase and gas-phase velocity under roughly the-same conditions of void fraction in Fig. 5, gas drift velocities were increased with decrease of gas density for all gases. Additionally, the dashed line indicates the HEM model, which defined that liquid velocity is equal to gas velocity. This trend indicated that gas drift velocity shifted closer to liquid-phase velocity with increasing gas density. Time-averaged data of liquid velocity, its fluctuation (RMS) and gas velocity are shown in Figs. 6, 7 and 8. These figures show that the trend of liquid velocity works in a positive direction and that of gas velocity works in a negative direction toward gas density. This result might suggest that flow velocity fluctuations were generated due to momentum transfer in bubbly flow. Furthermore, these transfer trends were demonstrated without reference to inlet superficial liquid and gas velocity from m/s to m/s. Finally, the gas drift velocity was compared with the drift-flux model using water and air [12] regarding void fractions for WMS, which are shown by the dashed lines in Fig. 9. The calculation with the drift-flux model was worked using Eq. (1). The void fraction in Eq. (1) employed the values measured by WMS; other thermo-physical properties were used for reference [11]. u Gd = ( α) 1 ( ρ ρ ) σg L G ρl (1) While the calculated lines estimated using the drift-flux model [12] did not shift relative to the changing gas density from kg/m to kg/m, experimental plots were negatively 3 3 changed for gas density. Although the drift-flux model defines a bubble as a spherical form, bubbles with diameters of approximately 4 mm practically move and deform from side to side and up and down as in the snapshots in Figs. 2 and 4. Therefore, it can be considered that the deformations of bubbles generated in two-phase flow affect bubbles to mass change with change of relative frictional force, in other words, density change. As a result, in the presence of bubble deformation, the gas density effect on the velocity field in two-phase flow is not negligible. 4. Conclusions

9 In order to understand forces acting on bubbles in two-phase flow under high pressure and high temperature in a nuclear reactor, we developed a combined measurement method applicable to gas phase velocity, void fraction, liquid-phase velocity and its fluctuation in a turbulent field using LDV and WMS. It compared gas velocity, void fraction, liquid velocity and its fluctuation (RMS) with gas density dependence for four types gases (helium, air, nitrogen and argon) to confirm the reliability of this compensated method. The trends found through the experiment indicated that (1) gas drift velocity shifted closer to liquid-phase velocity with increasing gas density, (2) gas density affected the liquid and gas velocity field at bubble interfaces, even though the effect of buoyant force caused by gasliquid density difference was negligible, and (3) in two-phase flow with roughly 4 mm bubbles, bubbles move and deform from side to side and up and down. Therefore, it can be considered that the deformation of bubbles causes mass change of bubbles with change of relative frictional force, in other words, density change. These suggest that gas-density has a considerable effect on forces acting on bubbles under a liquid and gas velocity field. Acknowledgment The authors are grateful to Mr. Takeo Yoshioka and Mr. Tsugumasa Iiyama of Electric Power Engineering Systems Co., Ltd. for their assistance in these experiments. Nomenclature g: Gravity [m/s ] 2 jl: Inlet superficial liquid volumetric flux [m/s] jg: Inlet superficial gas volumetric flux [m/s] jt: Total volumetric flux [m/s] ul: Liquid-phase velocity [m/s] u L-RMS: ug: Liquid-phase velocity fluctuation (RMS) [m/s] Gas-phase velocity [m/s] ugd: Gas drift velocity [m/s] α: Void fraction [-] ρ: Density [kg/m ] 3 ρl: Liquid density [kg/m ] 3

10 ρg: Gas density [kg/m 3 ] σ: Surface tension [N/m] References [1] W. D. Pointer et al., Proc. of 16 Int. Conf. Nuclear Engineering, (2008). th [2] C. Kocar et al., Nucl. Eng. Des., 239(2009), [3] F. Wang et al., Chinese J. Sensors and Actuators, 20-3(2007), 628. [4] F. Chen et al., Adv. Mat. Res., (2012), 671. [5] H. M. Prasser et al., Flow Meas. Inst., 16(2005), 73. [6] M.E. Shawkat et al., Int. J. Multiphase Flow, 33(2007), 300. [7] S. Hosokawa et al., Int. J. Heat and Fluid Flow, 40(2013), 97. [8] H. M. Prasser et al., Flow Meas. Inst., 9(1998), 111. [9] T. Hibiki et al., Chem. Eng. Sci., 62(2007), [10] Kanai et al., Int. J. Multiphase Flow, 46(2012), 75. [11] Japan Society of Thermophysical Properties, Thermophysical Properties Handbook (2008). [12] M. Ishi, Argonne National Laboratory-77-47, (1977).

Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water

Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water Hong Xu, Chokri Guetari ANSYS INC. Abstract Transient numerical simulations of the rise of a train of gas bubbles in a liquid

More information

Flow behavior of wakes in a three-phase slurry bubble column with viscous liquid medium

Flow behavior of wakes in a three-phase slurry bubble column with viscous liquid medium Korean J. Chem. Eng., 28(3), 974-979 (2011) DOI: 10.1007/s11814-010-0403-4 INVITED REVIEW PAPER Flow behavior of wakes in a three-phase slurry bubble column with viscous liquid medium Dae Ho Lim*, Ji Hwa

More information

Gas-liquid two-phase flow in a downward facing open channel

Gas-liquid two-phase flow in a downward facing open channel Computational Methods in Multiphase Flow III 219 Gas-liquid two-phase flow in a downward facing open channel D. Toulouse & L. I. Kiss Département des sciences appliquées, Université du Québec à Chicoutimi,

More information

FORMATION AND DEVELOPMENT OF SUBMERGED AIR JETS

FORMATION AND DEVELOPMENT OF SUBMERGED AIR JETS Formation and Development of Submerged Air Jets 137 FORMATION AND DEVELOPMENT OF SUBMERGED AIR JETS Sultana R. Syeda* and Ashfaq M. Ansery Department of Chemical Engineering Bangladesh University of Engineering

More information

The Study of Bubbly Gas-Water Flow Using

The Study of Bubbly Gas-Water Flow Using The Study of Bubbly Gas-Water Flow Using Displacement Current Phase Tomography Chris Zuccarelli 1, Benjamin Straiton 1, Joshua Sines 1, Qussai Marashdeh 1 1 Tech4Imaging, 1910 Crown Park Court, Columbus,

More information

Simulation of Gas Holdup in a Bubble Column with a Draft Tube for Gas Dispersion into an Annulus

Simulation of Gas Holdup in a Bubble Column with a Draft Tube for Gas Dispersion into an Annulus Simulation of Gas Holdup in a Bubble Column with a Draft Tube for Gas Dispersion into an Annulus Fukuji Yamashita Dept. of Applied Bioscience, Kanagawa Institute of Technology, Atsugi 243-292, Japan, yamasita@bio.kanagawa-it.ac.jp

More information

Workshop 1: Bubbly Flow in a Rectangular Bubble Column. Multiphase Flow Modeling In ANSYS CFX Release ANSYS, Inc. WS1-1 Release 14.

Workshop 1: Bubbly Flow in a Rectangular Bubble Column. Multiphase Flow Modeling In ANSYS CFX Release ANSYS, Inc. WS1-1 Release 14. Workshop 1: Bubbly Flow in a Rectangular Bubble Column 14. 5 Release Multiphase Flow Modeling In ANSYS CFX 2013 ANSYS, Inc. WS1-1 Release 14.5 Introduction This workshop models the dispersion of air bubbles

More information

Measurement of Bubble Velocity using Spatial Filter Velocimetry

Measurement of Bubble Velocity using Spatial Filter Velocimetry Lisbon, Portugal, 9 July, Measurement of Bubble Velocity using Spatial Filter Velocimetry Takaaki Matsumoto, Shigeo Hosokawa,*, Akio Tomiyama : Graduate School of Engineering, Kobe University, Kobe, Japan

More information

EXPERIMENTAL STUDY ON SNOW BEHAVIOR AROUND FENCES INSTALLED ALONG ELEVATED HIGHWAY

EXPERIMENTAL STUDY ON SNOW BEHAVIOR AROUND FENCES INSTALLED ALONG ELEVATED HIGHWAY ISTP-16, 25, PRAGUE 16 TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA EXPERIMENTAL STUDY ON SNOW BEHAVIOR AROUND FENCES INSTALLED ALONG ELEVATED HIGHWAY Akinori Nakata*, Haruo Soeda*, Junji Onishi*,

More information

Investigation of momentum exchange term closures for the Eulerian-Eulerian model applied to bubbly flows

Investigation of momentum exchange term closures for the Eulerian-Eulerian model applied to bubbly flows Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 2016 Investigation of momentum exchange term closures for the Eulerian-Eulerian model applied to bubbly flows

More information

Numerical simulation of an intermediate sized bubble rising in a vertical pipe

Numerical simulation of an intermediate sized bubble rising in a vertical pipe Computational Methods in Multiphase Flow V 111 Numerical simulation of an intermediate sized bubble rising in a vertical pipe J. Hua 1, S. Quan 2 & J. Nossen 1 1 Department of Process and Fluid Flow Technology,

More information

World Academy of Science, Engineering and Technology International Journal of Chemical and Molecular Engineering Vol:7, No:12, 2013

World Academy of Science, Engineering and Technology International Journal of Chemical and Molecular Engineering Vol:7, No:12, 2013 Study of the Particle Size Effect on Bubble Rise Velocities in a Three-Phase Bubble Column Weiling Li, Wenqi Zhong, Baosheng Jin, Rui Xiao, Yong Lu, Tingting He Abstract Experiments were performed in a

More information

Keywords: dynamic stall, free stream turbulence, pitching airfoil

Keywords: dynamic stall, free stream turbulence, pitching airfoil Applied Mechanics and Materials Vol. 225 (2012) pp 103-108 Online available since 2012/Nov/29 at www.scientific.net (2012) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/amm.225.103

More information

A model for the bubble lift-off diameter in subcooled boiling flow in a horizontal channel

A model for the bubble lift-off diameter in subcooled boiling flow in a horizontal channel Advances in Fluid Mechanics X 215 A model for the bubble lift-off diameter in subcooled boiling flow in a horizontal channel S. Shabannejad & N. Ashgriz Department of Mechanical and Industrial Engineering,

More information

Measurement of Coaxial Swirling Bubble Jet Flow by Interferometric Laser Imaging

Measurement of Coaxial Swirling Bubble Jet Flow by Interferometric Laser Imaging Measurement of Coaxial Swirling Bubble Jet Flow by Interferometric Laser Imaging Takuto Mitsuhashi 1,*, Kiyotaka Kobayashi 1, Tomohiro Takanashi 1, Koichi Hishida 1, Konstantinos Zarogoulidis 2 1: Department

More information

MODELING AND SIMULATION OF VALVE COEFFICIENTS AND CAVITATION CHARACTERISTICS IN A BALL VALVE

MODELING AND SIMULATION OF VALVE COEFFICIENTS AND CAVITATION CHARACTERISTICS IN A BALL VALVE Proceedings of the 37 th International & 4 th National Conference on Fluid Mechanics and Fluid Power FMFP2010 December 16-18, 2010, IIT Madras, Chennai, India FMFP2010 341 MODELING AND SIMULATION OF VALVE

More information

Numerical Analysis of Two Phase Flow Patterns in Vertical and Horizontal Pipes

Numerical Analysis of Two Phase Flow Patterns in Vertical and Horizontal Pipes Numerical Analysis of Two Phase Flow Patterns in Vertical and Horizontal Pipes MOHAMMED A. ABDULWAHID, HASANAIN J. KAREEM, MUJTABA A. ALMUDHAFFAR Thermal Mechanical Engineering, Southern Technical University,

More information

Study on Fire Plume in Large Spaces Using Ground Heating

Study on Fire Plume in Large Spaces Using Ground Heating Available online at www.sciencedirect.com Procedia Engineering 11 (2011) 226 232 The 5 th Conference on Performance-based Fire and Fire Protection Engineering Study on Fire Plume in Large Spaces Using

More information

Visual Observation of Nucleate Boiling and Sliding Phenomena of Boiling Bubbles on a Horizontal Tube Heater

Visual Observation of Nucleate Boiling and Sliding Phenomena of Boiling Bubbles on a Horizontal Tube Heater Proceedings of the 2 nd World Congress on Mechanical, Chemical, and Material Engineering (MCM'16) Budapest, Hungary August 22 23, 216 Paper No. HTFF 146 DOI:.11159/htff16.146 Visual Observation of Nucleate

More information

Experimental Analysis and CFD Simulation of Pressure Drop of Carbon Dioxide in Horizontal Micro Tube Heat Exchangers

Experimental Analysis and CFD Simulation of Pressure Drop of Carbon Dioxide in Horizontal Micro Tube Heat Exchangers Internatıonal Journal of Natural and Engineering Sciences 8 (2): 15-20, 2014 ISSN: 1307-1149, E-ISSN: 2146-0086, www.nobel.gen.tr Experimental Analysis and CFD Simulation of Pressure Drop of Carbon Dioxide

More information

Numerical Investigation of Air Bubbles Evolution and Coalescence from Submerged Orifices Based on OpenFOAM

Numerical Investigation of Air Bubbles Evolution and Coalescence from Submerged Orifices Based on OpenFOAM Numerical Investigation of Air Bubbles Evolution and Coalescence from Submerged Orifices Based on OpenFOAM Pan Feng, He Ying, Li-zhong Mu 2018-7-6 Dalian University of Technology, China Outline Background

More information

An innovative technology for Coriolis metering under entrained gas conditions

An innovative technology for Coriolis metering under entrained gas conditions An innovative technology for Coriolis metering under entrained gas conditions Coriolis mass flowmeters are usually only used for single-phase fluids, i.e. either liquids or gases, since it has been found

More information

Air-Sea Interaction Spar Buoy Systems

Air-Sea Interaction Spar Buoy Systems DISTRIBUTION STATEMENT A: Distribution approved for public release; distribution is unlimited Air-Sea Interaction Spar Buoy Systems Hans C. Graber CSTARS - University of Miami 11811 SW 168 th Street, Miami,

More information

DIAGNOSTICS OF IMPULSE LINE BLOCKAGE WITH A MULTI-SENSING DIFFERENTIAL PRESSURE TRANSMITTER AT THE AIR LINE

DIAGNOSTICS OF IMPULSE LINE BLOCKAGE WITH A MULTI-SENSING DIFFERENTIAL PRESSURE TRANSMITTER AT THE AIR LINE DIAGNOSTICS OF IMPULSE LINE BLOCKAGE WITH A MULTI-SENSING DIFFERENTIAL PRESSURE TRANSMITTER AT THE AIR LINE Akira Uehara, Jyun-ichi Eino, Takumi Hashizume 3, Tetsuya Wakui 3, Nobuo Miyaji 4, Yoshitaka

More information

Experimental Study of Flow around a Circular Cylinder inside a Bubble Plume

Experimental Study of Flow around a Circular Cylinder inside a Bubble Plume Advances in Chemical Engineering and Science, 2016, 6, 269-280 Published Online July 2016 in SciRes. http://www.scirp.org/journal/aces http://dx.doi.org/10.4236/aces.2016.63027 Experimental Study of Flow

More information

Effect of Nozzle Twisted Lance on Jet Behavior and Spitting Rate in Top Blown Process

Effect of Nozzle Twisted Lance on Jet Behavior and Spitting Rate in Top Blown Process , pp. 1410 1414 Effect of Nozzle Twisted Lance on Jet Behavior and Spitting Rate in Top Blown Process Yoshihiko HIGUCHI and Yukari TAGO Corporate Research & Development Laboratories, Sumitomo Metal Industries,

More information

Figure 2: Principle of GPVS and ILIDS.

Figure 2: Principle of GPVS and ILIDS. Summary Bubbly flows appear in many industrial applications. In electrochemistry, bubbles emerge on the electrodes in e.g. hydrolysis of water, the production of chloride and as a side-reaction in metal

More information

THE EFFECTS OF INLET FLOW CONDITIONS ON GAS-LIQUID TWO-PHASE FLOW IN A MICRO TUBE. Yuji Suzuki Dept. of Mech. Eng., The univ.

THE EFFECTS OF INLET FLOW CONDITIONS ON GAS-LIQUID TWO-PHASE FLOW IN A MICRO TUBE. Yuji Suzuki Dept. of Mech. Eng., The univ. Proceedings of HT007 007 ASME-JSME Thermal Engineering Summer Heat Transfer Conference July -, 007, Vancouver, British Columbia, CANADA HT007-39 THE EFFECTS OF INLET FLOW CONDITIONS ON GAS-LIQUID TWO-PHASE

More information

Flow pattern, pressure drop and void fraction of two-phase gas liquid flow in an inclined narrow annular channel

Flow pattern, pressure drop and void fraction of two-phase gas liquid flow in an inclined narrow annular channel Experimental Thermal and Fluid Science 30 (2006) 345 354 www.elsevier.com/locate/etfs Flow pattern, pressure drop and void fraction of two-phase gas liquid flow in an inclined narrow annular channel Somchai

More information

ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES

ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES Ninth International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 10-12 December 2012 ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES Jan Erik OLSEN* and Mihaela POPESCU

More information

PROPAGATION OF LONG-PERIOD WAVES INTO AN ESTUARY THROUGH A NARROW INLET

PROPAGATION OF LONG-PERIOD WAVES INTO AN ESTUARY THROUGH A NARROW INLET PROPAGATION OF LONG-PERIOD WAVES INTO AN ESTUARY THROUGH A NARROW INLET Takumi Okabe, Shin-ichi Aoki and Shigeru Kato Department of Civil Engineering Toyohashi University of Technology Toyohashi, Aichi,

More information

EWGAE 2010 Vienna, 8th to 10th September

EWGAE 2010 Vienna, 8th to 10th September EWGAE 2010 Vienna, 8th to 10th September Acoustic Emission for monitoring two-phase flow Shuib HUSIN, A. ADDALI, David MBA Cranfield University, School of Engineering, Cranfield, Bedfordshire, M43 0AL,

More information

MICRO-BUBBLE TRACER PARTICLES FOR PLANAR AND VOLUMETRIC PIV

MICRO-BUBBLE TRACER PARTICLES FOR PLANAR AND VOLUMETRIC PIV MICRO-BUBBLE TRACER PARTICLES FOR PLANAR AND VOLUMETRIC PIV APPLICATION NOTE V3V-FLEX-008 (US) Introduction Seed particle tracers for airflow and wind tunnel applications must fulfill a challenging set

More information

SIMULATION OF ENTRAPMENTS IN LCM PROCESSES

SIMULATION OF ENTRAPMENTS IN LCM PROCESSES Douai, FRANCE - July 6 SIMULATION OF ENTRAPMENTS IN LCM PROCESSES René Arbter, Paolo Ermanni Centre of Structure Technologies ETH Zurich, Leonhardstr. 7, 89 Zurich, Switzerland: rarbter@ethz.ch ABSTRACT:

More information

Analysis of Pressure Rise During Internal Arc Faults in Switchgear

Analysis of Pressure Rise During Internal Arc Faults in Switchgear Analysis of Pressure Rise During Internal Arc Faults in Switchgear ASANUMA, Gaku ONCHI, Toshiyuki TOYAMA, Kentaro ABSTRACT Switchgear include devices that play an important role in operations such as electric

More information

Modeling Turbulent Entrainment of Air at a Free Surface C.W. Hirt 5/24/12 Flow Science, Inc.

Modeling Turbulent Entrainment of Air at a Free Surface C.W. Hirt 5/24/12 Flow Science, Inc. Flow Science Report 01-12 Modeling Turbulent Entrainment of Air at a Free Surface C.W. Hirt 5/24/12 Flow Science, Inc. Overview In free-surface flows the turbulence in the liquid may be sufficient to disturb

More information

Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers

Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2016 Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers

More information

Effect of the cross sectional shape of the recirculation channel on expulsion of air bubbles from FDBs used in HDD spindle motors

Effect of the cross sectional shape of the recirculation channel on expulsion of air bubbles from FDBs used in HDD spindle motors DOI 10.1007/s00542-015-2537-0 TECHNICAL PAPER Effect of the cross sectional shape of the recirculation channel on expulsion of air bubbles from FDBs used in HDD spindle motors Yeonha Jung 1 Gunhee Jang

More information

PHYS 101 Previous Exam Problems

PHYS 101 Previous Exam Problems PHYS 101 Previous Exam Problems CHAPTER 14 Fluids Fluids at rest pressure vs. depth Pascal s principle Archimedes s principle Buoynat forces Fluids in motion: Continuity & Bernoulli equations 1. How deep

More information

The Mechanism Study of Vortex Tools Drainage Gas Recovery of Gas Well

The Mechanism Study of Vortex Tools Drainage Gas Recovery of Gas Well Advances in Petroleum Exploration and Development Vol. 7, No. 1, 214, pp. 62-66 DOI:1.3968/j.aped.1925543821471.1931 ISSN 1925-542X [Print] ISSN 1925-5438 [Online] www.cscanada.net www.cscanada.org The

More information

Variation in Pressure in Liquid-Filled Plastic Film Bags Subjected to Drop Impact

Variation in Pressure in Liquid-Filled Plastic Film Bags Subjected to Drop Impact Materials Transactions, Vol. 53, No. 2 (12) pp. 291 to 295 Special Issue on APCNDT 9 12 The Japanese Society for Non-Destructive Inspection Variation in Pressure in Liquid-Filled Plastic Film Bags Subjected

More information

Available online at ScienceDirect. Energy Procedia 71 (2015 )

Available online at   ScienceDirect. Energy Procedia 71 (2015 ) Available online at www.sciencedirect.com ScienceDirect Energy Procedia 71 (2015 ) 337 351 The Fourth International Symposium on Innovative Nuclear Energy Systems, INES-4 Measurement of bubbly two-phase

More information

CFD SIMULATIONS IN AN INTERNAL CIRCULATION AIRLIFT OPERATING UNDER HOMOGENEOUS REGIME

CFD SIMULATIONS IN AN INTERNAL CIRCULATION AIRLIFT OPERATING UNDER HOMOGENEOUS REGIME CFD SIMULATIONS IN AN INTERNAL CIRCULATION AIRLIFT OPERATING UNDER HOMOGENEOUS REGIME P. A. S. Monteiro 1, P. Seleghim Jr. 1 1 University of São Paulo, Engineering School of São Carlos, Mechanical Engineering

More information

AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE

AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE - 247 - AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE J D Castro a, C W Pope a and R D Matthews b a Mott MacDonald Ltd, St Anne House,

More information

ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN

ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN Bridget M. Wadzuk 1 (Member, ASCE) and Ben R. Hodges 2 (Member, ASCE) ABSTRACT Modeling of dynamic pressure appears necessary to achieve a more robust

More information

Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events

Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events K. Takase 1), H. Akimoto 1) 1) Japan Atomic Energy Research Institute (JAERI),

More information

Tomonori Mukunoki 1,*, Masaru Umezawa 1, Konstantinos Zarogoulidis 1,2, Koichi Hishida Introduction

Tomonori Mukunoki 1,*, Masaru Umezawa 1, Konstantinos Zarogoulidis 1,2, Koichi Hishida Introduction Development of a planar velocity measurement technique for gas-solid particles in liquid flows using the characteristics of scattered light on phase surfaces Tomonori Mukunoki 1,*, Masaru Umezawa 1, Konstantinos

More information

EXPERIMENTAL INVESTIGATION OF LIQUID HOLDUP IN HORIZONTAL TWO- PHASE ANNULAR FLOW USING CONSTANT ELECTRIC CURRENT METHOD (CECM)

EXPERIMENTAL INVESTIGATION OF LIQUID HOLDUP IN HORIZONTAL TWO- PHASE ANNULAR FLOW USING CONSTANT ELECTRIC CURRENT METHOD (CECM) SEMINAR NASIONAL ke-8 Tahun 213 : Rekayasa Teknologi Industri dan Informasi EXPERIMENTAL INVESTIGATION OF LIQUID HOLDUP IN HORIZONTAL TWO- PHASE ANNULAR FLOW USING CONSTANT ELECTRIC CURRENT METHOD (CECM)

More information

Ermenek Dam and HEPP: Spillway Test & 3D Numeric-Hydraulic Analysis of Jet Collision

Ermenek Dam and HEPP: Spillway Test & 3D Numeric-Hydraulic Analysis of Jet Collision Ermenek Dam and HEPP: Spillway Test & 3D Numeric-Hydraulic Analysis of Jet Collision J.Linortner & R.Faber Pöyry Energy GmbH, Turkey-Austria E.Üzücek & T.Dinçergök General Directorate of State Hydraulic

More information

Flow with. characteristics of gas-liquid-particle throughflow. mixing in a gas-stirred ladle system

Flow with. characteristics of gas-liquid-particle throughflow. mixing in a gas-stirred ladle system Experiments in Fluids z9 (1995) 328-335 9 Springer-Verlag 1995 Flow with characteristics of gas-liquid-particle throughflow S. Torii, W.-J. Yang mixing in a gas-stirred ladle system 328 Abstract An experimental

More information

EXPERIMENTAL ANALYSIS OF VAPOUR BUBBLE GROWING ON A HEATED SURFACE

EXPERIMENTAL ANALYSIS OF VAPOUR BUBBLE GROWING ON A HEATED SURFACE EXPERIMENTAL ANALYSIS OF VAPOUR BUBBLE GROWING ON A HEATED SURFACE T.A. KOWALEWSKI, R. TRZCIŃSKI, A. CYBULSKI 1, J. PAKLEZA, M.-C. DULUC 2 ABSTRACT Using high speed video camera and numerical processing

More information

Free Surface Flow Simulation with ACUSIM in the Water Industry

Free Surface Flow Simulation with ACUSIM in the Water Industry Free Surface Flow Simulation with ACUSIM in the Water Industry Tuan Ta Research Scientist, Innovation, Thames Water Kempton Water Treatment Works, Innovation, Feltham Hill Road, Hanworth, TW13 6XH, UK.

More information

Upward air water bubbly flow characteristics in a vertical square duct

Upward air water bubbly flow characteristics in a vertical square duct Journal of Nuclear Science and Technology ISSN: 0022-3131 (Print) 1881-1248 (Online) Journal homepage: http://www.tandfonline.com/loi/tnst20 Upward air water bubbly flow characteristics in a vertical square

More information

Flow and Mixing in the Liquid between Bubbles

Flow and Mixing in the Liquid between Bubbles Excerpt from the Proceedings of the COMSOL Conference 2009 Boston Flow and Mixing in the Liquid between Bubbles Bruce A. Finlayson, Professor Emeritus of Chemical Engineering Department of Chemical Engineering,

More information

1 SE/P-02. Experimental and Analytical Studies on Thermal-Hydraulic Performance of a Vacuum Vessel Pressure Suppression System in ITER

1 SE/P-02. Experimental and Analytical Studies on Thermal-Hydraulic Performance of a Vacuum Vessel Pressure Suppression System in ITER 1 SE/P-2 Experimental and Analytical Studies on Thermal-Hydraulic Performance of a Vacuum Vessel Pressure Suppression System in ITER K. Takase 1), H. Akimoto 1) 1) Japan Atomic Energy Research Institute,

More information

The effect of two inclined circular plunging jets on air entrainment in an aeration tank

The effect of two inclined circular plunging jets on air entrainment in an aeration tank Computational Methods in Multiphase Flow III 229 The effect of two inclined circular plunging jets on air entrainment in an aeration tank M. S. Baawain, M. Gamal El-Din & D. W. Smith Department of Civil

More information

Effect of 180 bends on gas/liquid flows in vertical upward and downward pipes

Effect of 180 bends on gas/liquid flows in vertical upward and downward pipes Computational Methods in Multiphase Flow VII 435 Effect of 180 bends on gas/liquid flows in vertical upward and downward pipes A. Almabrok, L. Lao & H. Yeung Department of Offshore, Process and Energy

More information

WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX. ABSTRACT

WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX. ABSTRACT WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX C. Lifante 1, Th. Frank 1 and A. Burns 2,3 1 ANSYS Germany GmbH, Staudenfeldweg 12, 83624 Otterfing, Germany 2 ANSYS UK, 97 Milton Park, Abingdon,

More information

EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER

EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER Yoichi Yamagishi 1, Shigeo Kimura 1, Makoto Oki 2 and Chisa Hatayama 3 ABSTRACT It is known that for a square cylinder subjected

More information

Gas Gathering System Modeling The Pipeline Pressure Loss Match

Gas Gathering System Modeling The Pipeline Pressure Loss Match PETROLEUM SOCIETY CANADIAN INSTITUTE OF MINING, METALLURGY & PETROLEUM PAPER 2005-230 Gas Gathering System Modeling The Pipeline Pressure Loss Match R.G. MCNEIL, P.ENG. Fekete Associates Inc. D.R. LILLICO,

More information

MODELING OF THERMAL BEHAVIOR INSIDE A BUBBLE

MODELING OF THERMAL BEHAVIOR INSIDE A BUBBLE CAV2001:sessionB6.002 1 MODEING OF THERMA BEHAVIOR INSIDE A BUBBE Boonchai ERTNUWAT *, Kazuyasu SUGIYAMA ** and Yoichiro MATSUMOTO *** *, ***Dept. of Mechanical Engineering, The University of Tokyo, Tokyo,

More information

Visualization and research of gas-liquid two phase flow structures in cylindrical channel

Visualization and research of gas-liquid two phase flow structures in cylindrical channel E3S Web of Conferences 1447, 026 (2017) DOI:.51/ e3sconf/201714026 Visualization and research of gas-liquid two phase flow structures in cylindrical channel Sebastian Stefański1*, Wojciech Kalawa1, Kaja

More information

Application of Simulation Technology to Mitsubishi Air Lubrication System

Application of Simulation Technology to Mitsubishi Air Lubrication System 50 Application of Simulation Technology to Mitsubishi Air Lubrication System CHIHARU KAWAKITA *1 SHINSUKE SATO *2 TAKAHIRO OKIMOTO *2 For the development and design of the Mitsubishi Air Lubrication System

More information

TWO PHASE FLOW METER UTILIZING A SLOTTED PLATE. Acadiana Flow Measurement Society

TWO PHASE FLOW METER UTILIZING A SLOTTED PLATE. Acadiana Flow Measurement Society TWO PHASE FLOW METER UTILIZING A SLOTTED PLATE Acadiana Flow Measurement Society Gerald L. Morrison Presented by: Mechanical Engineering Department Daniel J. Rudroff 323 Texas A&M University Flowline Meters

More information

CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator

CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator T. Huang 1, A. Caughley 2, R. Young 2 and V. Chamritski 1 1 HTS-110 Ltd Lower Hutt, New Zealand 2 Industrial Research Ltd

More information

CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS

CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS - 56 - CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS Gloth O., Rudolf A. ILF Consulting Engineers Zürich, Switzerland ABSTRACT This article investigates the

More information

Flow assurance in Oil-Gas Pipelines

Flow assurance in Oil-Gas Pipelines Fourth LACCEI International Latin American and Caribbean Conference for Engineering and Technology (LACCET 2006) Breaking Frontiers and Barriers in Engineering: Education, Research and Practice 21-23 June

More information

An experimental study of internal wave generation through evanescent regions

An experimental study of internal wave generation through evanescent regions An experimental study of internal wave generation through evanescent regions Allison Lee, Julie Crockett Department of Mechanical Engineering Brigham Young University Abstract Internal waves are a complex

More information

Two-phase Flow Across Small Diameter Split U-type Junctions

Two-phase Flow Across Small Diameter Split U-type Junctions Proceedings of Fifth International Conference on Enhanced, Compact and Ultra-Compact Heat Echangers: Science, Engineering and Technology, Eds. R.K. Shah, M. Ishizuka, T.M. Rudy, and V.V. Wadekar, Engineering

More information

Undertow - Zonation of Flow in Broken Wave Bores

Undertow - Zonation of Flow in Broken Wave Bores Lecture 22 Nearshore Circulation Undertow - Zonation of Flow in Broken Wave Bores In the wave breaking process, the landward transfer of water, associated with bore and surface roller decay within the

More information

Flow transients in multiphase pipelines

Flow transients in multiphase pipelines Flow transients in multiphase pipelines David Wiszniewski School of Mechanical Engineering, University of Western Australia Prof. Ole Jørgen Nydal Multiphase Flow Laboratory, Norwegian University of Science

More information

Air Bubble Departure on a Superhydrophobic Surface

Air Bubble Departure on a Superhydrophobic Surface Air Bubble Departure on a Superhydrophobic Surface A. Kibar 1, R. Ozbay 2, C.H. Choi 2 1 Department of Mechanical and Material Technologies, Kocaeli University, 41285, Kocaeli, Turkey 2 Department of Mechanical

More information

Pressure Drop of Two-Phase Flow Through Horizontal Channel with Smooth Expansion

Pressure Drop of Two-Phase Flow Through Horizontal Channel with Smooth Expansion Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2012 Pressure Drop of Two-Phase Flow Through Horizontal Channel with Smooth

More information

Numerical prediction and experimental verification of cavitation of Globe type Control Valves

Numerical prediction and experimental verification of cavitation of Globe type Control Valves Proceedings of the 7 th International Symposium on Cavitation CAV2009 Paper No. 22 August 17-22, 2009, Ann Arbor, Michigan, USA Numerical prediction and experimental verification of cavitation of Globe

More information

SIMULATION OF THE FLOW FIELD CHARACTERISTICS OF TRANSIENT FLOW

SIMULATION OF THE FLOW FIELD CHARACTERISTICS OF TRANSIENT FLOW The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 2009, Taipei, Taiwan SIMULATION OF THE FLOW FIELD CHARACTERISTICS OF TRANSIENT FLOW S. Cao 1, Y. Zhao 2, H. Ozono, Y. Tamura, A.Kareem

More information

EFFECTS OF SIDEWALL OPENINGS ON THE WIND LOADS ON PIPE-FRAMED GREENHOUSES

EFFECTS OF SIDEWALL OPENINGS ON THE WIND LOADS ON PIPE-FRAMED GREENHOUSES The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 29, Taipei, Taiwan EFFECTS OF SIDEWALL OPENINGS ON THE WIND LOADS ON PIPE-FRAMED GREENHOUSES Yasushi Uematsu 1, Koichi Nakahara 2,

More information

Large-eddy simulation of a turbulent buoyant helium plume

Large-eddy simulation of a turbulent buoyant helium plume Center for Turbulence Research Annual Research Briefs 8 45 Large-eddy simulation of a turbulent buoyant helium plume By G. Blanquart AND H. Pitsch. Motivation and objectives The numerical simulation of

More information

Bubble-bubble interactions and wall pressures/temperatures produced by the collapse of a bubble pair near a rigid surface

Bubble-bubble interactions and wall pressures/temperatures produced by the collapse of a bubble pair near a rigid surface Bubble-bubble interactions and wall pressures/temperatures produced by the collapse of a bubble pair near a rigid surface Abstract Shahaboddin A. Beig*; Eric Johnsen; Mechanical Engineering Department,

More information

Undertow - Zonation of Flow in Broken Wave Bores

Undertow - Zonation of Flow in Broken Wave Bores Nearshore Circulation Undertow and Rip Cells Undertow - Zonation of Flow in Broken Wave Bores In the wave breaking process, the landward transfer of water, associated with bore and surface roller decay

More information

Development of Fluid-Structure Interaction Program for the Mercury Target

Development of Fluid-Structure Interaction Program for the Mercury Target Chapter 4 Epoch Making Simulation Development of Fluid-Structure Interaction Program for the Mercury Target Project Representative Chuichi Arakawa Authors Chuichi Arakawa Takuma Kano Ryuta Imai Japan Atomic

More information

STUDY OF SLUG CONTROL TECHNIQUES IN PIPELINE SYSTEMS

STUDY OF SLUG CONTROL TECHNIQUES IN PIPELINE SYSTEMS STUDY OF SLUG CONTROL TECHNIQUES IN PIPELINE SYSTEMS JOSÉ L. A,VIDAL Petrobrás Research Center - CENPES/PDEP/TOOL Av.Horácio de Macedo 95- Cidade Universitária 191-915 -Rio de Janeiro-RJ E-mail:josearias@petrobras.com.br

More information

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY E. Porcheron, P. Lemaitre, A. Nuboer, V. Rochas and J. Vendel Institut de Radioprotection et de Sûreté Nucléaire

More information

ACCURACY AND FEASIBILITY OF BUBBLE DYNAMIC MEASUREMENTS WITH FOUR-POINT OPTICAL FIBER PROBES

ACCURACY AND FEASIBILITY OF BUBBLE DYNAMIC MEASUREMENTS WITH FOUR-POINT OPTICAL FIBER PROBES ACCURACY AND FEASIBILITY OF BUBBLE DYNAMIC MEASUREMENTS WITH FOUR-POINT OPTICAL FIBER PROBES R.V. Fortunati *1, S. Guet 1, G.Ooms 1, R.V.A. Oliemans 2 and R.F. Mudde 2 1 J.M. Burgerscentrum, Delft University

More information

Aerodynamic characteristics around the stalling angle of the discus using a PIV

Aerodynamic characteristics around the stalling angle of the discus using a PIV 10TH INTERNATIONAL SYMPOSIUM ON PARTICLE IMAGE VELOCIMETRY PIV13 Delft, The Netherlands, July 1-3, 2013 Aerodynamic characteristics around the stalling angle of the discus using a PIV Kazuya Seo 1 1 Department

More information

BUBBLE DISTRIBUTION IN A TURBULENT PIPE FLOW Catherine Colin, Dominique Legendre, Jean Fabre

BUBBLE DISTRIBUTION IN A TURBULENT PIPE FLOW Catherine Colin, Dominique Legendre, Jean Fabre BUBBLE DISTRIBUTION IN A TURBULENT PIPE FLOW Catherine Colin, Dominique Legene, Jean Fabre Institut de Mécanique des Fluides de Toulouse, UMR 55 CNRS-INP/UPS Avenue du professeur Camille Soula 314 Toulouse,

More information

Pressure distribution of rotating small wind turbine blades with winglet using wind tunnel

Pressure distribution of rotating small wind turbine blades with winglet using wind tunnel Journal of Scientific SARAVANAN & Industrial et al: Research PRESSURE DISTRIBUTION OF SMALL WIND TURBINE BLADES WITH WINGLET Vol. 71, June 01, pp. 45-49 45 Pressure distribution of rotating small wind

More information

Simulation of Free Surface Flows with Surface Tension with ANSYS CFX

Simulation of Free Surface Flows with Surface Tension with ANSYS CFX Simulation of Free Surface Flows with Surface Tension with ANSYS CFX C. Kurt Svihla, Hong Xu ANSYS, Inc. Abstract Three different test cases involving free surface flows with surface tension were investigated

More information

EXPERIMENTAL EVALUATIONS OF LOCAL BUBBLE PARAMETERS OF SUBCOOLED BOILING FLOW IN A PRESSURIZED VERTICAL ANNULUS CHANNEL

EXPERIMENTAL EVALUATIONS OF LOCAL BUBBLE PARAMETERS OF SUBCOOLED BOILING FLOW IN A PRESSURIZED VERTICAL ANNULUS CHANNEL EXPERIMENTAL EVALUATIONS OF LOCAL BUBBLE PARAMETERS OF SUBCOOLED BOILING FLOW IN A PRESSURIZED VERTICAL ANNULUS CHANNEL In-Cheol Chu, Seung Jun Lee, Young Jung Youn, Jong Kuk Park, Hae Sup Choi, Dong Jin

More information

Student name: + is valid for C =. The vorticity

Student name: + is valid for C =. The vorticity 13.012 Marine Hydrodynamics for Ocean Engineers Fall 2004 Quiz #1 Student name: This is a closed book examination. You are allowed 1 sheet of 8.5 x 11 paper with notes. For the problems in Section A, fill

More information

A PIV/PTV system for analysing turbulent bubbly flows

A PIV/PTV system for analysing turbulent bubbly flows A PIV/PTV system for analysing turbulent bubbly flows D. Bröder and M. Sommerfeld Institut für Verfahrenstechnik / Mechanische Verfahrenstechnik Fachbereich Ingenieurwissenschaften Martin-Luther-Universität

More information

PRESSURE DROP AND FLOW BEHAVIOUR OF REFRIGERANT TWO PHASE FLOW IN A SMOOTH HAIRPIN

PRESSURE DROP AND FLOW BEHAVIOUR OF REFRIGERANT TWO PHASE FLOW IN A SMOOTH HAIRPIN 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics HEFAT2 8 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 26 June July 2 Pointe Aux Piments,

More information

LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/12

LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/12 LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/ This experiment will introduce you to the kinetic properties of low-pressure gases. You will make observations on the rates with which selected

More information

Quantification of the Effects of Turbulence in Wind on the Flutter Stability of Suspension Bridges

Quantification of the Effects of Turbulence in Wind on the Flutter Stability of Suspension Bridges Quantification of the Effects of Turbulence in Wind on the Flutter Stability of Suspension Bridges T. Abbas 1 and G. Morgenthal 2 1 PhD candidate, Graduate College 1462, Department of Civil Engineering,

More information

Experimental investigation on air entrainment below impinging jets by means of video observations and image processing

Experimental investigation on air entrainment below impinging jets by means of video observations and image processing Computational Methods in Multiphase Flow V 481 Experimental investigation on air entrainment below impinging jets by means of video observations and image processing D. V. Danciu, M. J. da Silva, M. Schmidtke,

More information

Experimental Investigation of CCFL in Pressurizer Surge Line with Air-Water

Experimental Investigation of CCFL in Pressurizer Surge Line with Air-Water Experimental Investigation of CCFL in Pressurizer Surge Line with Air-Water ZW Wang, WX Tian, JT Yu, DL Zhang, G H Su, SZ Qiu, RH Chen School of Nuclear Science and Technology, Xi an Jiao Tong University

More information

DUE TO EXTERNAL FORCES

DUE TO EXTERNAL FORCES 17B.6 DNS ON GROWTH OF A VERTICAL VORTEX IN CONVECTION DUE TO EXTERNAL FORCES Ryota Iijima* and Tetsuro Tamura Tokyo Institute of Technology, Yokohama, Japan 1. INTRODUCTION Various types of vertical vortices,

More information

CRYSTALLIZATION FOULING IN PACKED COLUMNS

CRYSTALLIZATION FOULING IN PACKED COLUMNS CRYSTALLIZATION FOULING IN PACKED COLUMNS D. Großerichter and J. Stichlmair Lehrstuhl für Fluidverfahrenstechnik, Technische Universität München, Munich, Germany ABSTRACT Fouling due to crystallization

More information

AIR FRACTIONS IMPACT OVER PRESSURE DROP IN AIR- WATER MIXTURE FLOW

AIR FRACTIONS IMPACT OVER PRESSURE DROP IN AIR- WATER MIXTURE FLOW U.P.B. Sci. Bull., Series D, Vol. 79, Iss. 4, 2017 ISSN 1454-2358 AIR FRACTIONS IMPACT OVER PRESSURE DROP IN AIR- WATER MIXTURE FLOW Corina BONCESCU 1, Diana ROBESCU 2 The pressure drop in air-water mixture

More information

SENSITIVITY ANALYSIS OF THE FIRST CIRCUIT OF COLD CHANNEL PIPELINE RUPTURE SIZE FOR WWER 440/270 REACTOR

SENSITIVITY ANALYSIS OF THE FIRST CIRCUIT OF COLD CHANNEL PIPELINE RUPTURE SIZE FOR WWER 440/270 REACTOR PROCEEDINGS OF THE YEREVAN STATE UNIVERSITY Physical and Mathematical Sciences 216, 2, p. 57 62 P h y s i c s SENSITIVITY ANALYSIS OF THE FIRST CIRCUIT OF COLD CHANNEL PIPELINE RUPTURE SIZE FOR WWER 44/27

More information

Influence of local void fraction distribution on turbulent structure of upward bubbly flow in vertical channel

Influence of local void fraction distribution on turbulent structure of upward bubbly flow in vertical channel Journal of Physics: Conference Series Influence of local void fraction distribution on turbulent structure of upward bubbly flow in vertical channel To cite this article: T Ogasawara et al 2009 J. Phys.:

More information