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Cross wind simulation problem

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Old   November 14, 2012, 05:54
Default Cross wind simulation problem
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I've been doing some cross wind simulation of a electrical race car for my master's thesis, and I'm not quite sure if the outcome is correct.

Calculations for 0 yaw angle came out quite well. I've been doing it with symmetry boundary condition, moving walls for sides of the domain, the gorund and the top. Mesh type - hex near the walls of the domain, tetra with density near the vehicle, and additionally I've made prism on the vehicle's surface.
For 15 yaw I've mirrored the domain and the vehicle, and rotated the car. The same settings of mesh and b.c.

The thing is, drag for 15 is smaller than for 0, which is quite surprisng. Is there something I'm missing, or doing wrong?

Thanks for your help in advance
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Old   November 18, 2012, 07:45
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Anyone? I would really appreciate your assistance...
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