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Basics : Cylinder flow

This LS-DYNA simulation shows a simple ICFD input deck with a coarse mesh. The inflow is characterized by a prescribed velocity while the reference pressure has been set to 0 for the outlet (undisturbed flow). For the far field domain, a freeslip boundary condition has been used, stipulating that the normal component of the velocity is null while the tangential is left free. For those conditions to be physically valid, they need to be put far away for the object of interest in this case the cylinder. The volume mesh is generated automatically and a boundary layer mesh has been applied to the cylinder in order to better capture the velocity gradient close to the wall.