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Numerical Simulation of Bubble Dynamics in a Vortex Flow Using Navier-Stokes Computations and Moving Chimera Grid Scheme

Hsiao, Chao-Tsung and Chahine, Georges L. (2001) Numerical Simulation of Bubble Dynamics in a Vortex Flow Using Navier-Stokes Computations and Moving Chimera Grid Scheme. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA. (Unpublished) http://resolver.caltech.edu/CAV2001:sessionA10.001

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Abstract

A numerical scheme using Navier-Stokes computations was applied to simulate bubble dynamics in a vortex flow. A moving grid generation scheme and a Chimera grid scheme were integrated with the Navier-Stokes solver to automatically generate the appropriate grids based on the moving bubble surface. A general free surface boundary condition was implemented to describe the bubble surface motion. The numerical scheme was validated by comparing results with those obtained from the Rayleigh-Plesset equation and from the potential flow solver, 3DynaFS, for bubble dynamics in an infinite volume of quiescent water with/without the gravity effect. Important numerical factors that influenced the accuracy of solution are reported. Finally, the computations were conducted for bubbles released within a Rankine vortex. Different bubble behaviors were observed for different cavitation numbers.


Item Type:Conference or Workshop Item (Lecture)
Additional Information:[Alternate URL: http://www.dynaflow-nc.com/Reports/sessionA10.001.pdf] bubble vortex two-way viscous interaction
Subject Keywords:cavitation, bubble dynamics, RANS, tip vortex, nonspherical
Record Number:CAV2001:sessionA10.001
Persistent URL:http://resolver.caltech.edu/CAV2001:sessionA10.001
Usage Policy:The papers of this symposium proceedings are protected by copyright, retained by the authors. Authors control translation and reproduction rights to these works. However, readers are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format. This permission is in addition to rights of reproduction granted under Section 107, 108, and other provisions of the U.S. Copyright Act.
ID Code:80
Collection:CaltechCONF
Deposited By: Imported from CAV2001
Deposited On:02 May 2001
Last Modified:26 Dec 2012 07:09

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