Meshing of a diffusor geometry for Neko. #2358
Replies: 1 comment 6 replies
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what are the light-blue block in the second figure? |
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ok, so the light-blue things were nothing really, and the geometry is the round pipe going into a rectangular diffuser? |
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Yes, they are just primary blocking I have done. and yes the geometry is a round pipe going into a rectangular diffuser as in Picture 1. |
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Hi @pschlatt1, I just wanted to follow up on my previous message if you ever get a chance, I would really appreciate some recommendation from you. It would mean a lot to me. |
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Sorry for the late answer. I cannot really help with ICEM. But as a simple suggestion to start with; do you really need the hemisphere in your case? Can't you just use the pipe topology (your figure above) and continue that in the rectangular duct part, with four sharp corners in those edges with the diagonals? There needs to be some smooth transition anyway. Perhaps gmesh should be able to do that as well. |
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No problem, I have tried this methodology, before it works well for any finite volume solver, as I make lot of cuts in the axial direction. But in SEM, the hex elements are relatively large compared to the FV solver so when I have large blocks it is skewed which is not recommended for NEKO. I can try in gmesh, but do you have any recommendations for the smooth transition from a circle to a high aspect ratio rectangle? I am attaching the rectangular section as well here. Also, I appreciate your help very much 👍 |
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Hi, I was asking does anyone have some recomendation on how can I efficiently make a mesh for my diffusor geometry, I have attached below. The problem with normal Finite Volume meshing is when I make the block bigger as Spectral elements typically should be bigger than the Fv cell, the quality goes down and I dont think it is possible to get the quality better with my current approach. I am also attaching my current blocking here.
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