NUMERICAL ANALYSIS OF THE CAVITATING FLOWS

Cavitating flows are notoriously complex because they are highly turbulent and unsteady flows involving two species (liquid/vapor) with a large density difference. These features pose a unique challenge to numerical modeling works. This paper reports recent developments and application studies on Computational Fluid Dynamics (CFD) for cavitating flow. The examples of latest technologies for the solver algorithm, physical models (turbulence and cavitation) and meshing tools are presented. The current effort is based on the application of the recently developed full cavitation model that utilizes the modified Rayleigh-Plesset equations for bubble dynamics and includes the effects of turbulent pressure fluctuations to rotating cavitation in different types of fluid turbomachines. Comparisons with available experimental data are used to assess the accuracy of numerical results.

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