Preprocessing

Preprocessing

need help with the minimum orthogonal quality value and maximum aspect ratio

    • kalyan
      Subscriber

      I'm using the ansys 19.1 academic version and i am getting a value for min orthogonal quality as 0.02 and aspect ratio as 25.01 when I tried to do the analysis.


      I need to know what are the best values possible and attainable for the model in the attachment (i.e. the geometry) and also the way to improve the value of min orthogonal quality if required. 


      Please do help!!!

    • Naresh Patre
      Ansys Employee

      Hello kalyan,


      Can you upload a few snapshots of the mesh that you generated? It will help us to provide better suggestions.

    • kalyan
      Subscriber

      Thank you Mr. NMPatre for your response.


      please find the snapshots below


      front view



      isometric view


    • Rob
      Ansys Employee

      I suspect you're growing the mesh too quickly or don't have enough cells around the object in the middle.  Check your minimum cell sizes and growth rate. Also please confirm you've got the meshing tool set to CFD. 

    • kalyan
      Subscriber
      Sir could you please elaborate as you said "Also please confirm you've got the meshing tool set to CFD. "
      Sir im a beginner so please do elaborate it.
      Thank you
      Regards Kalyan
    • Keyur Kanade
      Ansys Employee

      Hello, 


      Please have a look at following video. 


      Please try to get min orthogonal quality to 0.1 for fluids simulation. 


      Regards,


      Keyur


    • kalyan
      Subscriber

      sir,


      Is 0.1 a good value for the min orthogonal quality?

    • Rob
      Ansys Employee

      It's acceptable, ideally it wants to be higher.  Have you gone through the tutorials that come with the R19 documentation and that are posted elsewhere on the community? 

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