Fluids

Fluids

What does it mean by ‘Warning: zone of type interior found between different solids!’?

    • Donghyun Yim
      Subscriber

      Hi,

       

      When I initialize the solution on fluent solve, the following message appears.

       

      Warning: zone of type interior found between different solids!

      Material of cell zone 14 is sus, while material of cell zone 13 is polymide.

      This will adversely affect the solution.

      It is recommended that you fix this issue via the TUI command

       

      /mesh/modify-zones/slit-interior-between-diff-solids

       

      Unless I enter the above command it diverges, but when I enter that command it converges.

       

      I got the final solution, but I am curious of why that warning appeared.

       

      Thanks,

      Donghyun

    • Keyur Kanade
      Ansys Employee

      'interior' is nothing but the interior cells. for any boundary usually we have 'wall' type. so it it is 'interior' then solver will treat as 'interior' rather than 'wall'. 

      if this helps you, please mark this post as 'is solution' to help others on forum.

       

       

       

    • Donghyun Yim
      Subscriber

      So that warning message implies the absence of wall between different interiors (or solids), and that command splits them.

      If so, do I need to modify mesh before solve in order to prevent that warning?

      Thanks,

      Donghyun

    • Keyur Kanade
      Ansys Employee

      no need to modify mesh. 

      select face between two solids in meshing and give named selection. 

      if you already have different named selection for this then please select this named selection in fluent and change its type to wall.

       

    • Donghyun Yim
      Subscriber

      If the type of face between two faces is set to be wall, no thermal energy exchange or uds exchange occurs across the wall. (as I understood)

      So its type needs to be 'interface', not 'wall', doesn't it?

       

      Thank for your kind reply,

      Donghyun

       

    • Keyur Kanade
      Ansys Employee

      you can set it as interface depending your configuration. 

    • zahedi
      Subscriber
      hello,nWhen I initialize the solution on fluent solve, the following message appears.nWarning: zone of type interior found between different fluids!nMaterial of cell zone 2 is air, while material of cell zone 6 is pcm.nThis will adversely affect the solution.nPlease correct the setup,nnIt is possible to help me!n
    • Rob
      Ansys Employee
      If you have different fluids in a model you need either species or multiphase turned on. It's not as simple as just setting the cell zone materials. n
    • cherlene
      Subscriber
      What if I have two different fluid: air and mixture, How should I turn on the species? I turned on this model. But it still shows the error.nnn
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