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I'm getting too high velocities in simple 2D geometry

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Old   June 17, 2015, 16:43
Default I'm getting too high velocities in simple 2D geometry
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I'm simulating co2 through a nozzle, using a 2d axysimmetric model like this:

The problem is that the velocity gives very high values in the inlet (around 1200m/s).

The inlet is pressure inlet, gauge pressure 14 bar and initial/supersonic 13.9bar. The model is transport of species co2+air, k-epsilon realizable.

Does anyone know what am i doing wrong or how to solve this?
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