Keyur Kanade
Ansys Employee

car simulation will require much more mesh than this. 

anyways, for your case, please use symmetry for tunnel walls. 

refine mesh as much as possible. 

check domain extends and then decide inlet velocity. reduce turbulence values at the inlet. 

there are some videos on external air flow on youtube. please check. 

If this helps, please mark this post as 'Is Solution' to help others. 




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