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[ICEM] How to Mesh around cylinders very close to a wall |
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April 2, 2021, 21:25 |
How to Mesh around cylinders very close to a wall
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#1 |
New Member
Sameed Akber
Join Date: Nov 2020
Posts: 7
Rep Power: 6 |
Hi Everyone. This is my first post. I'm sorry in advance if there is an error in my post formatting.
I'm simulating flow in an open channel as it flow past cylinders arranged in a pattern. Normally, for flow past a cylinder, I would use an O-grid meshing (around said cylinder) but I'm struggling to find a meshing method for the case where cylinder is very close to the boundary (walls). I've managed to generate a mesh in ICEM but it seems to be faulty when I feed it into Fluent. Could anyone point me in the right direction as to how an appropriate meshing could be generated in this case in ICEM CFD. Thank you. I've attached my geometry and mesh (faulty). |
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April 2, 2021, 22:39 |
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#2 |
Senior Member
Kira
Join Date: Nov 2020
Location: Canada
Posts: 435
Rep Power: 9 |
So what is wrong with the mesh, is it giving you bad quality elements?
Maybe the readout of the quality/min. angle of elements would be useful to include. I can imagine there might be bad quality elements where the wall meets the cylinder. You might have to manually adjust the vertices to increase the angle. |
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April 3, 2021, 10:35 |
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#3 | |
New Member
Sameed Akber
Join Date: Nov 2020
Posts: 7
Rep Power: 6 |
Quote:
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April 3, 2021, 10:54 |
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#4 |
Senior Member
Joern Beilke
Join Date: Mar 2009
Location: Dresden
Posts: 540
Rep Power: 20 |
It is the worst type of geometry to mesh, because your domain runs into a very small angle. Just cheat a little bit and let the cylinders slightly cross the wall.
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April 3, 2021, 13:03 |
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#5 |
New Member
Sameed Akber
Join Date: Nov 2020
Posts: 7
Rep Power: 6 |
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April 3, 2021, 16:20 |
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#6 |
Senior Member
Joern Beilke
Join Date: Mar 2009
Location: Dresden
Posts: 540
Rep Power: 20 |
A slightly better way is not to move the circle but to include 2 additional vertical lines.
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Tags |
grid check, grid check failed, icem, icem 2d, meshing |
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