Simulations of gas-liquid compressible-incompressible systems using SPH

Journal article

Publication Details

Author(s): Nair P, Tomar G
Journal: Computers & Fluids
Publication year: 2019
Volume: 179
Pages range: 301-308
ISSN: 0045-7930


Gas bubbles immersed in a liquid and flowing through a large pressure gradient undergo volumetric deformation in addition to possible deviatoric deformation. While the high density liquid phase can be assumed to be an incompressible fluid, the gas phase needs to be modeled as a compressible fluid for such bubble flow problems. The Rayleigh-Plesset (RP) equation describes such a bubble undergoing volumetric deformation due to changes in pressure in the ambient incompressible fluid in the presence of capillary force at its boundary, assuming axisymmetric dynamics. We propose a compressible-incompressible coupling of Smoothed Particle Hydrodynamics (SPH) and validate this coupling against the RP model in two dimensions. This study complements the SPH simulations of a different class of compressible-incompressible systems where an outer compressible phase affects the dynamics of an inner incompressible phase. For different density ratios, a sinusoidal pressure variation is applied to the ambient incompressible liquid and the response of the bubble in terms of volumetric deformation is observed and compared with the solutions of the axisymmetric RP equation. (C) 2018 Elsevier Ltd. All rights reserved.

FAU Authors / FAU Editors

Nair, Prapanch
Lehrstuhl für Multiscale Simulation of Particulate Systems

External institutions with authors

Indian Institute of Science (IISc)

How to cite

Nair, P., & Tomar, G. (2019). Simulations of gas-liquid compressible-incompressible systems using SPH. Computers & Fluids, 179, 301-308.

Nair, Prapanch, and Gaurav Tomar. "Simulations of gas-liquid compressible-incompressible systems using SPH." Computers & Fluids 179 (2019): 301-308.


Last updated on 2019-28-05 at 15:08