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Originally Posted by COcyclist
The CFD was done without modeling turning wheels. Great article. Thanks.
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Also, it should be noted that they did model wheel rotation. Under 18.2 Methodology:
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A complete moving ground plane was simulated using the sliding wall boundary condition, and the wheel rotation was included using a sliding mesh representation on all parts of the wheel except for the tyres, which had a rotating wall boundary condition applied.
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And in the conclusion, they point out the error in the modeling of tire rotation specifically:
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The obvious discrepancy between the experimental setup and the computational is the axisymmetric modelling and lack of true rotation of the tyres in CFD. As no account is taken to the rotational shape changes, it will invariably have an effect on the computational results.
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