Highly non-orthogonal cells in C-Grid Mesh

airwarriorg91 · March 1, 2025, 10:41

Hello,
I have created a 3D mesh from a 2D mesh around an airfoil. I used the periodic translate option to create the other periodic boundary. Then assembled other domains and blocks. I am getting highly non-orthogonal mesh elements in the C-blocks. I am not sure why this is happening. How can I fix this ?

Thanks,
GG

Attached: Image for reference.

johnotter · March 19, 2025, 04:05

I think you need to 'fan' those cells on the boundary out a bit more. What I mean is increase the spread of cells on your boundary. You have a close grouping of cells on your airfoil surface which needs to be spread out as your approach the farfield domain. In an ideal world you would have a fairly uniform cell width at your farfield.

How have you constructed your farfield? Did you 'grow' the mesh from a surface mesh using a normal extrusion? Or do you have a connector on the farfield? It is much easier to alter the farfield if you have a connector.

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March 19, 2025, 04:05		#2
johnotter New Member John Otter Join Date: Mar 2025 Posts: 5 Rep Power: 2	I think you need to 'fan' those cells on the boundary out a bit more. What I mean is increase the spread of cells on your boundary. You have a close grouping of cells on your airfoil surface which needs to be spread out as your approach the farfield domain. In an ideal world you would have a fairly uniform cell width at your farfield. How have you constructed your farfield? Did you 'grow' the mesh from a surface mesh using a normal extrusion? Or do you have a connector on the farfield? It is much easier to alter the farfield if you have a connector.