Fluids

Fluids

How to undo mesh adapatation?

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    • tyw7
      Subscriber
      How to undo the mesh adaptation done using Fluent 2020R2?n
    • subhamdas
      Subscriber
      Before using mesh adaptation, you need to save an instance of the mesh you started with as it is not possible to undo mesh adaptation once it has been performed.n
    • tyw7
      Subscriber
      Would re-meshing or changing the geometry cause the optimization to be undone?n
    • subhamdas
      Subscriber
      Yes, it willn
    • tyw7
      Subscriber
      Ah phew. So in summary you can get rid of bad optimizations by either re-meshing or changing the geometry.nnI guess I can force a remesh by making a minor change, say decrease your mesh size, in the mesh and then changing that setting back to the original setting.n
    • Rob
      Ansys Employee
      Array ArraynYou can coarsen a mesh which will undo normal adaption, this will return you to the original (or previous state). Anisotropic adaption however is permanent. n
    • tyw7
      Subscriber
      wait does coarsening a mesh undo the refinement? So if I coarsen and refine by the same setting, I am basicallly resetting the mesh back to the original?n
    • Rob
      Ansys Employee
      More or less, because of the way refinement can leak slightly into adjacent cells you may find a few extra cells than in the original mesh but it'll be near enough what you started with. nIt's for a hex mesh, but here's dynamic adaption illustrated
      Working on 16/9/2020n
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