Dynamics of a spheroidal gas bubble near a rigid surface

Non-spherical dynamics of a bubble during its axisymmetric collapse near a planar rigid wall is considered. The liquid surrounding the bubble is ideal incompressible, its flow is potential. The pressure in the bubble is uniform, and varying with respect to adiabatic law. At the beginning of collapse...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-10, Vol.1328 (1), p.12043
Main Authors: Aganin, A A, Kosolapova, L A, Malakhov, V G
Format: Article
Language:English
Subjects:
Boundary element method
Computational fluid dynamics
Fluid flow
Incompressible flow
Physics
Rigid walls
Shape
Thickness
Velocity distribution
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Summary:Non-spherical dynamics of a bubble during its axisymmetric collapse near a planar rigid wall is considered. The liquid surrounding the bubble is ideal incompressible, its flow is potential. The pressure in the bubble is uniform, and varying with respect to adiabatic law. At the beginning of collapse, the bubble is spheroidal, the liquid is motionless. A numerical technique is applied, which is based on a stepwise method in time for calculating the bubble surface movement and on the boundary element method. The initial stage of the bubble collapse till the moment of contact between some parts of the bubble surface (i.e., till losing its one-connectedness) is considered. The effect of the ratio of the semi-axes of the spheroidal bubble and the initial thickness of the liquid layer between the bubble and the wall on the bubble shape, the pressure and velocity fields in liquid are investigated. The region of the problem parameters (the distance from the wall, the bubble non-sphericity) is outlined, in which the bubble collapses with formation of a cumulative liquid jet impacting on the bubble surface part nearest to the wall. The liquid pressures resulting from the impact are estimated.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1328/1/012043