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compressible couette flow

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Old   October 30, 2006, 16:47
Default compressible couette flow
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I tried to simulate a 2D periodic compressible couette flow. The geometry:Width is 10 and the height is 1. I set up the solver for segregated, steady, laminar, and enable the energy equation. The material is the ideal gas. The top wall is moving at the speed of 10m/s(x-dir). The initial condition i setup is x-velocity is 5m/s. The result is very bad even i have run for 50000 timestep. I expected that i can get a linear curve, however, i just got a s-curve. The convergence of the continuity never reaches the convergence criteria. Do i miss anything?? can anyone answer my question? I thought it should not be hard at all. thanks.

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