A Chimera Grid Scheme for the Calculation of the Flow Around Particles in Difficult Geometries

Abstract

In this investigation a Chimera grid scheme has been developed for the calculation of particle flows. The Chimera scheme is an overset grid scheme approach, where each configuration of a complex geometry is grided separately and then overset onto a main grid. In general the method can handle efficiently difficult problems in computational fluid dynamics like particle wall interaction and the flows around multiple particle systems. The scheme has been introduced into a two as well as three dimensional and incompressible Navier-Stokes computer code. The system of equation was solved by a finite volume formulation including the thermal energy equation. It was tested for some simple problems like the two dimensinal flow through a heat exchanger configuration and the well known problem of the flow over a spherical particle. In the results some calculations concerning particle wall interaction will be presented.