Abstract
The boundary element method (BEM) is applied to solve the unsteady behavior of a bubble placed in a vortex flow field. The steady vortex field is given in terms of the viscous core radius and the circulation, both of which may vary along the vortex axis. For this study, 2DynaFS©, an axisymmetric potential flow code which has been verified successfully for diverse type of fluid dynamic problems, is extended. The modifications to accommodate the ambient vortex flow field and to model the extreme deformations of the bubble are presented. Through the numerical simulations, the time history of the bubble geometry and the corresponding pressure signal at a fixed field point are obtained. A special effort is made to continue the numerical simulation after the bubble splits into two or more sub-bubbles. Indeed, it is found that an elongated bubble sometimes splits into smaller bubbles, which then collapse with the emission of strong pressure signals. The behavior of the axial jets after the split is also studied in more detail.
Similar content being viewed by others
Author information
Authors and Affiliations
Corresponding author
Additional information
This work was conducted at Dynaflow, Inc. (www.dynaflow-inc.com). The work has been supported by the Office of Naval Research under the contract No. N0014–99-C-0369 monitored by Dr. Ki-Han Kim. This support is greatly appreciated.
Rights and permissions
About this article
Cite this article
Choi, JK., Chahine, G. Non-spherical bubble behavior in vortex flow fields. Computational Mechanics 32, 281–290 (2003). https://doi.org/10.1007/s00466-003-0485-5
Issue Date:
DOI: https://doi.org/10.1007/s00466-003-0485-5