[blockMesh] Irregularities in the mesh

milad1990 · July 2, 2020, 12:17

Hello Every One
I am quit new to OpenFoam and I am trying to make mesh for a geometry based on blockmesh. my Code is working good and mesh "on the surface" looks fine, but when I "slice" the mesh (because its 3D), and use "wireframe "I find some irregularities in mesh like some extra lines. I attached a sample photo. Do you know how can I fix this?

All checkMesh criteria is fine by the way.
Is this Paraview problem or is it really mesh problem? (lnk to photo :https://ibb.co/DMySPgp)

Thank you so much in advance

Ardali · July 2, 2020, 21:09

Hi,
You say checkMesh is fine.
How fine is it? All your cells are hexadera? If so, your problem is only representation issue in OF. Dont worry.
Good luck
Ardalan

milad1990 · July 3, 2020, 16:09

Hello Ardalan
Thanks for your reply.

My checkMesh says the mesh is fine. By the way I solved the problem. I do not know why, but my domain was from -z to +z and the only slice that had these irregularities was z=0, so I changed the domain to z=0 to z=2*z and now the irregularities are not there any more.

Thanks
Milad

July 2, 2020, 12:17	Irregularities in the mesh	#1
milad1990 New Member Join Date: May 2020 Posts: 12 Rep Power: 5	Hello Every One I am quit new to OpenFoam and I am trying to make mesh for a geometry based on blockmesh. my Code is working good and mesh "on the surface" looks fine, but when I "slice" the mesh (because its 3D), and use "wireframe "I find some irregularities in mesh like some extra lines. I attached a sample photo. Do you know how can I fix this? All checkMesh criteria is fine by the way. Is this Paraview problem or is it really mesh problem? (lnk to photo :https://ibb.co/DMySPgp) Thank you so much in advance

July 2, 2020, 21:09		#2
Ardali Member Ardalan Join Date: Jul 2012 Location: Atlanta, USA Posts: 77 Rep Power: 13	Hi, You say checkMesh is fine. How fine is it? All your cells are hexadera? If so, your problem is only representation issue in OF. Dont worry. Good luck Ardalan milad1990 likes this.

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July 3, 2020, 16:09		#3
milad1990 New Member Join Date: May 2020 Posts: 12 Rep Power: 5	Hello Ardalan Thanks for your reply. My checkMesh says the mesh is fine. By the way I solved the problem. I do not know why, but my domain was from -z to +z and the only slice that had these irregularities was z=0, so I changed the domain to z=0 to z=2*z and now the irregularities are not there any more. Thanks Milad