Fluid-fluid Interaction Study of Different Density and Viscosity Using Smoothed Particle Hydrodynamics Method

In Computational Fluid Dynamics, fluid-fluid interaction is used to model the behaviour of two different fluids as a mixture. The numerical simulations of fluid-fluid interaction were carried out by using Smoothed Particle Hydrodynamics (SPH) method based on Navier-Stokes equation in FORTRAN programming language. Correct assumptions and other suitable conditions are needed to reach best fluid-fluid interaction simulation. The term of viscosity force equation was written to model the multiple-fluid interactions. This research uses two different fluids in density and viscosity within a three-dimensional cube container. In order to get a pure interaction of fluids, other effects and influences like chemical reaction and heat transfer are neglected. The fluids are miscible with each other. The fluid particle collisions to container are regarded as perfectly elastic collisions. The simulations of two different fluids in this research showed different particle movements in each numerical simulation, but similar to its actual behaviour.