Simulation of Kelvin-Helmholtz Instability Using VOF Method

ABSTRACT In this article at first, to show the performance of surface tension models (CSF, CSS and SGIP), three-dimensional motionless bubble of gas in a surrounding fluid with different density and viscosity are studied. Because of good and appropriate performance of the SGIP model in static case, we used SGIP model for dynamic case. Then, we studied the Kelvin-Helmholtz instability, which are produced by shear at the interface between two fluids with different physical properties. When surface tension are considering, we display to develop the Instability for a critic value of the fluids velocity difference. It has pointed out that we are able to simulate Interfacial flows such as Kelvin-Helmholtz Instability using SGIP model.