Modelling of bubble dynamics in a venturi flow with a potential flow method

Gaston, M.; Reizes, John; Evans, Geoffrey M.

doi:10.1016/s0009-2509(01)00294-9

Cited by 14 publications

(4 citation statements)

References 4 publications

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“…Besides, effects of the shocks on the bubbles interactions have also been analysed. The same Rayleigh-Plesset equation has been used by Gaston et al (2001) in modelling the bubbles as a potential source. The stream function has been written in function of spatial coordinates and the source term.…”

Section: Introductionmentioning

confidence: 99%

Analysis of cavitating flow through a venturi

Zamoum¹,

Kessal²

2015

Sci. Res. Essays

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A dynamical study of a bubbly flows in a transversal varying section duct (Venturi), is modeled by the use of the mass and momentum phases equations, which are coupled with the Rayleigh-Plesset equation of the bubbles dynamics. The effects of the throat dimension and the upstream void fraction on flow parameters are investigated. The numerical resolution of the previous equations set let us found that the characteristics of the flow change dramatically with upstream void fraction. Two different flow regimes are obtained: a quasi-steady and a quasi-unsteady regimes. The former is characterized by a large spatial fluctuations downstream of the throat, which are induced by the pulsations of the cavitation bubbles. The quasi-unsteady regime corresponds to flashing flow in which occurs a bifurcation at the flow transition between these regimes. This transition occurs at R c  4.3 which corresponds to  s  4.710-3. An analytical expression for the critical bubble size at the flashing flow point is also obtained and compared with theoretical data.

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Section: Introductionmentioning

confidence: 99%

Analysis of cavitating flow through a venturi

Zamoum¹,

Kessal²

2015

Sci. Res. Essays

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“…Sherwood (2000) found that the differential pressure between the entrance and the throat of a Venturi tube decreased first and increased afterward due to the passage of a single bubble. Gaston et al (2001) obtained the bubble history, instantaneous velocity map and instantaneous stream function contour in a Venturi tube using the boundary element method and one-dimensional bubble dynamic equations. Elperin et al (2002) estimated the release of the gas dissolved in the liquid phase during the gas-liquid two-phase flow passing a Venturi tube and compared the pressure drop of gas release with that of flow acceleration.…”

Section: Introductionmentioning

confidence: 99%

Mass flow measurement of gas–liquid bubble flow with the combined use of a Venturi tube and a vortex flowmeter

Sun

2010

Meas. Sci. Technol.

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Development of effective techniques for gas–liquid two-phase flow measurement is of interest to both academic research and industrial applications. This paper presents a novel approach to the measurement of the mass flow rate of homogeneous gas–liquid bubble flow with the combined use of a Venturi tube and a vortex flowmeter. The Venturi tube and the vortex flowmeter were mounted in the same pipeline with a spacing interval of ten times the pipe's inner diameter. A measurement correlation was established based on the differential pressure generated across the Venturi tube and the frequency extracted from the vortex flowmeter signal. Experiments were conducted on a vertical upward gas–liquid two-phase flow rig under the bubble flow pattern, with the air mass flow rate from 0.2 × 10−3 to 3.2 × 10−3 kg s−1, the water mass flow rate from 3.3 to 5.2 kg s−1 and the volumetric void fraction from 0.004 to 0.246. The results show that the relative errors of the correlation for the mixture mass flow rate measurement were within ±5%, and the maximum standard deviation of the relative errors was 2.0%. This method provides a simple and practical solution to the mass flow measurement of homogeneous gas–liquid bubble flows.

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“…The studies include air-water flows (Soubiran and Sherwood, 2000;Gaston and Reizes, 2001), oil-gas flows 2005) and wet gas metering (Steven, 2002;Xu et al, 2003). Most of the researchers Huang et al, 2005) have used a flow pattern detector or void fraction meter in addition to a venturimeter for measurement of the total flow rate.…”

Section: Introductionmentioning

confidence: 99%