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RESEARCH PAPERS

Modeling Hydrodynamic Nonequilibrium in Cavitating Flows

[+] Author and Article Information
Yongliang Chen, S. D. Heister

School of Aeronautics and Astronautics, Purdue University, 1282 Grissom Hall, West Lafayette, IN 47907

J. Fluids Eng 118(1), 172-178 (Mar 01, 1996) (7 pages) doi:10.1115/1.2817497 History: Received January 16, 1995; Revised November 06, 1995; Online December 04, 2007

Abstract

A nonlinear numerical model has been developed to assess nonequilibrium effects in cavitating flows. The numerical implementation involves a two-phase treatment with the use of a pseudo-density which varies between the liquid and gas/vapor extremes. A new constitutive equation for the pseudo-density is derived based on the bubble response described by a modified form of the Rayleigh-Plesset equation. Use of this constitutive equation in a numerical procedure permits the assessment of nonequilibrium effects. This scheme provides a quantitative description of scaling effects in cavitated flows. With minimal modifications, the model can also be used for bubbly two-phase flows.

Copyright © 1996 by The American Society of Mechanical Engineers
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