Preprocessing

Preprocessing

Topics related to geometry, meshing, and CAD.

ICEM pre-mesh generation error

    • trimaran
      Subscriber

      Hello!


      I am creating a structured mesh using blocking in ICEM. After deleting unwanted blocks and spliting blocks by using prescribed points I set the pre-mesh parameters for edges. Then I generated the pre-mesh and some lines seem to be very random. I had this problem before with simpler model and after generating the premesh I had to re-assign parameters for few edges, recompute, re-assign for another few and so on. Unfortunately this time this approach does not give any results - last time the pre-mesh lines had e.g. wrong direction for bunching laws but they did not connect outside blocks they were attached to (as they do now).


      When I set the edge parameters I use "copy to all parallel".


      How to solve this?


       



      Best regards


      Jakub


       


      Edit: I did exactly the same for this mesh but much smaller quantities of edge divisions and everything worked as it should. May it be a problem with memory assigned by the software of number of processor used?

    • Keyur Kanade
      Ansys Employee

      This looks assignment problem. 


      please assign edges/curves and faces correctly. 


      try on small model first and then replicate it for bigger model. 


      Regards,


      Keyur


       


      If this helps, please mark this post as 'Is Solution' to help others.


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    • trimaran
      Subscriber

      Thank you for your reply. But if it is assignment problem why it is not a problem when the edges have smaller number of mesh nodes assigned?


      But if it the only way to make it work properly, how to assign everything sufficiently? Due to high density of blocks it is impossible to choose correct surfaces/edges/vertices from the inside of the model.


      Regards


      Jakub


      Edit: I went back to the project's save before setting all the edges' parameters and re-do all edge setting, but this time I recomputed the pre-mesh after every change in the edges' settings. Mesh is perfectly clear and structured now. I did not make any associations.


      Although my question, for future meshing, remains: is there any method to make association process more convenient/clear for complex models with many blocks in the same part (e.g. for choosing internal surfaces)?

    • Keyur Kanade
      Ansys Employee

      Most of the times edge association is done manually. The automatic association will work only on simple models. For such complex models, you will have to do manually. 


       


      Regards,


      Keyur


       


      If this helps, please mark this post as 'Is Solution' to help others.


      Guidelines on the Student Community


      How to access ANSYS help links


       

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