Fluids

Fluids

Topics related to Fluent, CFX, Turbogrid and more.

Meshing problem

    • abhishekkumar2r0
      Subscriber

      As I am refining it, the doodled part only has straight lines forming long elements, no small hexahedral elements like in the other parts of the image. How to resolvethis

    • Rob
      Forum Moderator

      What have you set the various sizing options as? Why do you need a butterfly mesh? 

    • abhishekkumar2r0
      Subscriber

      The model is of CFD and it is hollow cylinder and fluid part is divided into 5 parts to creat uniform hexahedral meshing. I had done automatic method for the whole body and edge sizing of the edges dividing the fluid domain by choosing number of division as 100. And the result I am getting is in one sliced part of fluid domain long elements are formed instead of small ones. So how to resolve this or this can be solved as I am solving it for natural convection process when the tube is heated with a constant heat flux and nusselt number is to be calculated 

    • Rob
      Forum Moderator

      I'm aware of what a O-grid/butterfly mesh is, I'm just wondering why anyone would bother doing it now. 

      You've set a cell size on the centre body. Have you set any sizing on the surrounding bodies? I'd favour using a single volume, inflate the boundary (read up on Sweep method) and pave the end face. It's far quicker and will likely result in a higher quality mesh. 

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