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-   -   Freestream Setup in an External Flow Simulation (http://www.cfd-online.com/Forums/star-ccm/69366-freestream-setup-external-flow-simulation.html)

phathomie27 October 20, 2009 18:38

Freestream Setup in an External Flow Simulation
 
I have set up an external flow simulation with supersonic freestream conditions. I have a cylinder around the geometry and I declared the top and bottom of the cylinder as the inlet and outlet respectively, and the sides as the freestream atmosphere. The freestream has zero gauge pressure and a Mach number of 2.0. The problem is that the freestream prevents my simulation from converging...instead it performs a limit cycle behavior (oscillates instead of converges). Any idea what I may be missing?


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