Setting up boundary Conditions - Presentation and Demo - ANSYS CFD for FSAE teams - 5/10

Computational Fluid Dynamics workflow and best practices for FSAE teams using ANSYS Fluent.
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[@LvtLoshi]

Doesnt setting the wall at -11m/s while the inlet velocity is 11m/s essentially mean that the wall and fluid will be moving at 22m/s in reference to each-other? Correct me if im wrong but ive always assumed that the fluid is set at a certain speed to simulate the car moving through the fluid at that speed , by setting the wall as moving in the opposite direction are you not essentially testing a car moving inside of a tunnel with walls moving in the opposite direction to the car with their own velocity? *sorry havent had time to watch through the entire video/series if ive missed something obvious youve said on this topic*

[@eliopereira7112]

I think that you didn't get into account the way that Ansys regards the velocity vector in an inlet surface. It is considered to be an inward pointing vector which is normal to the surface. Therefore, due to the position of the boundary, the inlet velocity setted in the video corresponds to -11 m/s ez, as you wanted it to be.