Please use this identifier to cite or link to this item:
|Title:||Vortex ring modelling of toroidal bubbles|
Potential flow theory
|Citation:||Wang, Q.X., Yeo, K.S., Khoo, B.C., Lam, K.Y. (2005-10). Vortex ring modelling of toroidal bubbles. Theoretical and Computational Fluid Dynamics 19 (5) : 303-317. ScholarBank@NUS Repository. https://doi.org/10.1007/s00162-005-0164-6|
|Abstract:||During the collapse of a bubble near a surface, a high-speed liquid jet often forms and subsequently impacts upon the opposite bubble surface. The jet impact transforms the originally singly-connected bubble to a toroidal bubble, and generates circulation in the flow around it. A toroidal bubble simulation is presented by introducing a vortex ring seeded inside the bubble torus to account for the circulation. The velocity potential is then decomposed into the potential of the vortex ring and a remnant potential. Because the remnant potential is continuous and satisfies the Laplace equation, it can be modelled by the boundary-integral method, and this circumvents an explicit domain cut and associated numerical treatment. The method is applied to study the collapse of gas bubbles in the vicinity of a rigid wall. Good agreement is found with the results of Best (J. Fluid Mech. 251 79-107, 1993), obtained by a domain cut method. Examination of the pressure impulse on the wall during jet impact indicates that the high-speed liquid jet has a significant potential for causing damage to a surface. There appears to be an optimal initial distance where the liquid jet is most damaging.|
|Source Title:||Theoretical and Computational Fluid Dynamics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jun 17, 2018
WEB OF SCIENCETM
checked on Jun 5, 2018
checked on Jun 8, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.