Numerical Analysis of Temperature Fields Inside Nonspherical Bubbles in the Final Stage of Collapse

Yasuda, Akihiro and Takahira, Hiroyuki (2001) Numerical Analysis of Temperature Fields Inside Nonspherical Bubbles in the Final Stage of Collapse. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA.

Full text available as:

PDF - Requires Adobe Acrobat Reader or other PDF viewer.

Abstract

The temperature fields inside a collapsing bubble near a plane rigid wall are investigated. We develop a numerical method based on the boundary element method combined with the finite volume method. In this method, the adaptive unstructured grids which are generated by Delaunay triangulation are used inside the largely deformable bubble to consider the heat transfer of the internal gas. We compare the present numerical results with those using structured grids. The result shows that the present method has sufficient accuracy to investigate the bubble motion. It is also shown that the present method can be applied to the analysis for the temperature fields inside tiny bubbles in which the thermal boundary layer is thick. Since the unstructured grids are more flexible for the regeneration and resizing of grids, the present method is applicable to the dynamics of toroidal bubbles by taking the thermal diffusivity of the internal gas into account.

EPrint Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	cavitation, boundary element method, unstructured grid, heat transfer, microjet, toroidal bubble
Subjects:	All Records Session A4 Bubble Dynamics and Vortices
ID Code:	196
Deposited By:	Akihiro Yasuda
Deposited On:	02 May 2001
Record Number:	CAV2001:sessionB6.003
Official Persistent URL:	http://resolver.caltech.edu/CAV2001:sessionB6.003
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.

Archive Staff Only: edit this record