Aitor
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@Aitor ! Thank you for your reply! And Yes ! My model is 3D. Do you mean the results of my velocity is correct? Can you detail me more? Thank You!https://forum.ansys.com/discussion/comment/109060#Comment_109060

I do not find anything wrong in your reasoning. Have you checked everything (mass flow rate, density and velocity) at 'Reports' - 'Surface Integrals' and 'Reports' - 'Fluxes'? With these values you should be able to detect the error.