NUMERICAL STUDY OF TWO INTERFACE METHODS FOR COMPRESSIBLE MULTI-FLUID FLOWS

INTRODUCTIONThe direct numerical simulation of com-pressible multi- fluid flows is an important re-search topic with various key applications.Therelatively dominant difficulty of simulation lies intreatment of the moving material interface. Ingeneral,there are two basic approaches to treatcontact discontinuities.The first,front trackingmethod1,2 ] ,explicitly characterize the interfacemotion by the motion of individual points on theinterface. The other approach is front capturingmethod3…

NUMERICAL STUDY OF TWO INTERFACE METHODS FOR COMPRESSIBLE MULTI-FLUID FLOWS

Two interface capturing methods are studied for multi fluid flows, governed by the stiffened gas equation of state. The mixture type interface capturing algorithm uses a simple volume fraction model Euler equations written in a quasi conservative form, which is solved by a standard high resolution piecewise parabolic method (PPM) with multi fluid Riemann solver. The level set interface capturing method uses a narrow band ghost fluid method (GFM) with no numerical smearing. Several examples are presented and compared for one and two dimensions, which show the feasibility of the two methods applied to various multi fluid problems.