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External Compressible Flow Initial Conditions

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Old   November 19, 2013, 09:30
Lightbulb External Compressible Flow Initial Conditions
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L.Bryce Whitson Jr.
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I am currently running a CFD analysis on a model rocket with external flow. The goal is to determine the effect of fin shapes on the drag, lift, and moment coefficients on the item in steady state conditions.

Currently I am using a modified sonicFoam solver which utilizes the compressible CoNum to determine the time step. This solver works well with the domain initialized to the free-stream conditions, but I would like to set the initial conditions a little closer to the final result as I currently have to start with a very low time step (Co~0.01) in order to avoid crashing at the start up.

I tried using potentialFoam for the initial conditions and this helped a little bit, but I found that it took much longer for the flow to reach steady state than just starting fresh. Any thoughts or suggestions?
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compressible, external aerdynamics, potentialfoam, sonicfoam, start up

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