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  3. Can flow in boundary be normal to a 3D cylindrical surface?

Can flow in boundary be normal to a 3D cylindrical surface?

Tagged: 19.1, autodyn, boundary-conditions, Explicit - AUTODYN, Model Generation, structural-mechanics
    • March 17, 2023 at 8:59 am
      FAQFAQ
      Participant

      If user is using Autodyn 3D multi-material Euler solver or Ideal gas Euler solver, the Euler mesh has to be rectilinear so you cannot define the flow-in boundary condition through the normal of a cylindrical surface. If you have to use this type of boundary condition, you need to edit Autodyn user subroutine EXFLOW to enter different flow-in velocity components at each Euler element and make sure the flow-in direction is always normal to the given cylindrical surface.

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