Flow Dynamics of Two Phase (air and water ) Stratified Flow by a Simulation Package COMSOL MULTIPHYSICS
In this paper simulation of the two phase stratified flow is carried out by a Commercial Simulation Package Comsol Multiphysics version 3.4 using level set approach for tracking the movements of the interface. The problem involves the Simulation ( based on Transient analysis) of two phase stratified flow between two planes in (2D) two Dimension. Some boundary problems arose in defining specific geometry, that is why a little different geometry approach is presented to overcome this problem. Further, gravity that usually stabilizes the flow by providing specific flow pattern (specially separation of the fluids in gravity field having different densities ) when flow is occurring in gravity field was observed that gravity constant destabilize the flow (carrying simulation in Comsol Multiphysics ) and convergence problem arises. That is why the flow has checked by keeping the value of gravity zero at first then, giving a much less value than the gravity really has, and increased gradually to a value beyond which again the flow did not converge. The effects of Surface tension Coefficient on the flow, are also observed and presented.