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Multizone Blocking Decomposition failed.

    • ZIco
      Subscriber

      Hi 


      I am facing mesh problem and the generated mesh is not so smooth. i am using Multizone method with edge sizing and face mesh.


      Please check the attachment for reference and help me to generate smooth mesh.


      Regards


       


      Zico

    • Rob
      Ansys Employee

      What are you trying to model?  The volumes don't look to be connected so you won't get a conformal mesh and sweep should work fine along the length of the pipes. 

    • ZIco
      Subscriber

      I want to model a drilling operation i.e to build a cutting transportation model through the annular fluid.  I have used the Sweep method too but it works only for wellbore not for drillpipe. Please check the attachment:

    • Keyur Kanade
      Ansys Employee

      first of all get geometry connected with share topology. 



      If there are any internal details, hex mesh may fail. 


      then you can use tet mesh with inflation. 



      Regards,


      Keyur


       


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


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    • ZIco
      Subscriber

      Dear Keyur


      I have tried all the option as per your recommendation but its still not working. Also i have tried face mesh and its not working.


      Here i am sharing my mesh details with geometry.....


      please verify it that i have done anything wrong here.


      Mesh


      Sectional view


      In joint section


      Mesh details, which i have done:






      Geometry Details, Which i have used:




       


      Regards


      Zico

    • Keyur Kanade
      Ansys Employee

      i can see some tet mesh in your images. 


      please seletct source and target faces while defining multizone. 


      if multizone fails, you can also try sweep method. 


      please check help document for sweep method. 


      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


       

    • ZIco
      Subscriber

      Hi


      I have tried all your recommended options but its still not working (i.e in mesh face mesh option is not working).


      If i don't form new part then i find a good mesh, is it ok or not, i need your concern:




      cross-section of soild pipe:



      regards


      Zico

    • Rob
      Ansys Employee

      Turn off all the local sizing and set the global values to be something sensible. Use a multibody part and turn off multizone. What happens?

    • regitasyali
      Subscriber

      Hello, I am no expert and also new to this field but someone sent me this neat multizone meshing video tutorial and I hope this helps. Good luck!


      https://studentcommunity.ansys.com/thread/multizone-blocking-decomposition-failed-1/

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