Hi...I am new to CFD and I am already stuck with a quite simple (i believe) problem. I am trying to represent a density current in a box, released by a moving wall. The wall has to be removed slowly from above. I looked at the mesh deformation tutorial, but i think it doesn't really fit my problem. If I apply a mesh deformation the meshes get almost useless(they stretch too much on the lower part of the wall) and, as they move vertically, they will end up going outside of the domain, stopping the solver. What do you think is best to do?
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