Fluids

Fluids

Turbine mesh inflation problem

    • Ak Muhammad Adam Pg Hj Ahmad
      Subscriber

      Original post is here https://www.reddit.com/r/ANSYS/comments/zy3t2i/infinitely_increasing_power_coefficient_with/?utm_source=share&utm_medium=ios_app&utm_name=iossmf

      Hello friends,

      I am attempting to run a simulation using a whole rotor geometry and i was told to add inflation in my meshing for accuracy because my current mesh resulted in infinitely increasing torque on rotor blades with respect increasing angular velocity. 

       

      However i am unable to employ inflation on my turbine properly, can i get a guide on how i can apply inflation on complex geometry such as a rotor, with turbine blade and hub connected

       

    • Keyur Kanade
      Ansys Employee

      Please check following videos

      Ansys Meshing Sizing:

      Ansys Meshing: Inflation:

      Please go through help manual for more details 

      Regards,

      Keyur

      How to access Ansys Online Help Document

      Guidelines on the Student Community

       

    • Nikhil Narale
      Ansys Employee

      Hello, 

       

      Can you post some images of your geometry and the existing mesh in the comments? 

       

      I would recommend you to assign named selection to the rotor surfaces at the CAD level. With this, you can explicitly add boundary layers on the rotor surfaces (and not on hub).

      Also, I would recommend you to use Ansys Fluent Meshing Watertight Workflow. 

      Check out this free course on how to add boundary layers (inflation layers): Add Boundary Layers - ANSYS Innovation Courses

       

      Thanks!

      Nikhil

    • Ak Muhammad Adam Pg Hj Ahmad
      Subscriber

      Hello keyur and nikhil,

      thanks for the video suggestion keyur 

       

      and for nikhil, im tried to inflate this blade geometry but this is how it ended up im not sure, can you suggest where i should select for the boundary?

    • Ak Muhammad Adam Pg Hj Ahmad
      Subscriber

      Hello Ansys employee,

      Any new advice, you can help me with?

    • Ak Muhammad Adam Pg Hj Ahmad
      Subscriber

      Do i need to apply sizing along the edges on the blade in order for this to work? i tried to follow the video but as u can see the blade geometry is not as simple as box and cylinder please advise me on this dear ansys employee keyur and nikhil

    • Keyur Kanade
      Ansys Employee

      Please use tetrahedron method. Then use inflation with aspect ratio method. 

      Please go through help manual for more details 

      Regards,

      Keyur

      How to access Ansys Online Help Document

      Guidelines on the Student Community

       

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