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  3. In Fluent MDM, why does DEFINE_GRID_MOTION get called twice per timestep?

In Fluent MDM, why does DEFINE_GRID_MOTION get called twice per timestep?

Tagged: 18.2, deforming mesh, dynamic-meshing, fluent, fluid-dynamics, Mesh Deformation, Moving Mesh, Moving/Deforming Mesh
    • April 5, 2023 at 2:32 pm
      FAQFAQ
      Participant

      For some mesh smoothing methods in Fluent (diffusion smoothing), the mesh is moved in a preliminary step to evaluate the boundary conditions for the mesh smoothing equations. After this test, the mesh is reset. So ultimately the mesh motion is only applied once.

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