[Other] CheckMesh for mesh quality

gdbaldw · October 16, 2007, 11:13

To all,

checkMesh tells me I have one concaveFace, but as can be seen in the attached image this white face owned by the purple cell does not appear to be concave. In general, does checkMesh simply screen for possible mesh errors? I ask because this is not the first time checkMesh produced an error/warning for what appeared to me to be a good mesh.

Doug

mattijs · October 16, 2007, 15:09

Concavity check should pick up where consecutive edges form a normal (right-hand rule) which points opposite to the face normal. Can't see any problems with the code itself (OpenFOAM/lnInclude/primitiveMeshCheck.C).

Does the wireframe of the concave face show the same? (VTK does not display solid concave faces correctly)

gdbaldw · October 18, 2007, 01:11

Mattijs,

You are absolutely correct. Identical views of this face displayed in paraFoam as a surface and as a wireframe are attached below. Thank you for making this clear for me.

Doug

October 16, 2007, 11:13	CheckMesh for mesh quality	#1
gdbaldw Member Doug Baldwin Join Date: Mar 2009 Posts: 53 Rep Power: 17	To all, checkMesh tells me I have one concaveFace, but as can be seen in the attached image this white face owned by the purple cell does not appear to be concave. In general, does checkMesh simply screen for possible mesh errors? I ask because this is not the first time checkMesh produced an error/warning for what appeared to me to be a good mesh. Doug

October 16, 2007, 15:09	Concavity check should pick up	#2
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	Concavity check should pick up where consecutive edges form a normal (right-hand rule) which points opposite to the face normal. Can't see any problems with the code itself (OpenFOAM/lnInclude/primitiveMeshCheck.C). Does the wireframe of the concave face show the same? (VTK does not display solid concave faces correctly)

October 18, 2007, 01:11	Mattijs, You are absolutely	#3
gdbaldw Member Doug Baldwin Join Date: Mar 2009 Posts: 53 Rep Power: 17	Mattijs, You are absolutely correct. Identical views of this face displayed in paraFoam as a surface and as a wireframe are attached below. Thank you for making this clear for me. Doug

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ICEM] Unexplained changes of mesh quality and blocking approach	salumi	ANSYS Meshing & Geometry	9	November 23, 2016 05:14
[ICEM] How to improve bad quality elements that are obtained after creating prism layers?	Rohith Giridhar	ANSYS Meshing & Geometry	2	July 11, 2015 19:04
[Commercial meshers] failed CheckMesh in spite of good quality	-mAx-	OpenFOAM Meshing & Mesh Conversion	2	May 24, 2013 02:48
[Commercial meshers] gambit import mesh quality problem with checkmesh	mrshb4	OpenFOAM Meshing & Mesh Conversion	0	December 26, 2010 14:17
[Technical] Mathematical exact definition of mesh quality measures in OpenFOAM checkMesh utility	albcem	OpenFOAM Meshing & Mesh Conversion	1	October 31, 2008 05:12