Numerical Analysis of Cavitation Processes in a Nozzle with Variable Cross-Section

Numerical simulation approach addressing problems of cavitation processes and vapor-liquid two-phase flow dynamics research is discussed. The Navier-Stokes equations, supplemented by transport equation containing source terms, responsible for the interphase exchange, are solved to obtain hydrodynami...

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Bibliographic Details
Published in:The journal of computational multiphase flows (Online) 2013-09, Vol.5 (3), p.189-206
Main Authors: Zagordan, N.L., Reviznikov, D.L., Cherkasov, S.G.
Format: Article
Language:English
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Summary:Numerical simulation approach addressing problems of cavitation processes and vapor-liquid two-phase flow dynamics research is discussed. The Navier-Stokes equations, supplemented by transport equation containing source terms, responsible for the interphase exchange, are solved to obtain hydrodynamic characteristics of the system. Mathematical model of unsteady conjugate heat-mass transfer between the bubble and the surrounding liquid is proposed to describe the evolution of a two-component (gas-vapor) bubble. The model takes into account a spatial nonuniformity of the gas and liquid temperature fields as well as nonuniformity of the component concentration inside the bubble. A comparative analysis of the experimental data and computational results is carried out for different regimes of cavitating flows inside a two-dimensional nozzle with variable cross-section. The oscillation characteristics of hydrodynamic parameters and the gas-vapor bubbles behavior are investigated.
ISSN:1757-482X
1757-4838
DOI:10.1260/1757-482X.5.3.189