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.

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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.

EPrint 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
Uncontrolled Keywords:	cavitation, bubble dynamics, RANS, tip vortex, nonspherical
Subjects:	All Records Session A4 Bubble Dynamics and Vortices
ID Code:	190
Deposited By:	Georges Chahine
Deposited On:	02 May 2001
Record Number:	CAV2001:sessionA10.001
Official Persistent URL:	http://resolver.caltech.edu/CAV2001:sessionA10.001
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