ESI Group CFD Portal - Simulation of Turbulent Flow Past a Cylinder Using Chimera Grids

Turbulent subsonic flow of air past a cylinder is modeled. Diameter of the cylinder is 1m. The flow has a free-stream Mach number,M, of 0.5.The free stream temperature and pressure are 300K and 1 x 10⁵ Pa, respectively.The Reynolds number, Re, of the flow, based on the chord length of the airfoil, is 9 x 10⁶.The computational domain is modeled with Chimera technology using an O-mesh around the cylinder which is overset on a Cartesian background mesh.

Details

This tutorial covers the following subjects:

Setting a model name and title for the problem.
Reading a multi domain, DTF grid, and building a CFD-FASTRAN model.
Setting fluid properties such as molecular weight.
Setting initial values for the flow field.
Setting up a Chimera problem with overset grids.
Setting boundary conditions appropriate for the Chimera Method and the flow problem.
Setting solution iterations and cycles.
Choosing a suitable time-integration scheme and setting CFL numbers.

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