[ICEM] What causes negative determinants?

CDollarsign · February 26, 2013, 19:02

What causes negative determinants when checking quality? It seems that I get negative determinants in my pre-mesh but then when I load from blocking I can fix them with the mesh check...

Far · February 26, 2013, 23:45

There are many reasons for negative determinant. Sometimes mesh is al-right but vectors are not and fix is simply fix the determinant.

But mostly this is due to penetrating elements into geometry or other blocks due to wrong association or misaligned blocked. The solution may be simple in some cases and in other cases you may have to redo the whole blocking in more innovative way. But keep on trying you will come to know what is causing problem and how to fix it. Sometimes the problem is due to edge mesh parameters.

February 26, 2013, 19:02	What causes negative determinants?	#1
CDollarsign New Member Colin Fiola Join Date: Jul 2012 Posts: 19 Rep Power: 13	What causes negative determinants when checking quality? It seems that I get negative determinants in my pre-mesh but then when I load from blocking I can fix them with the mesh check...

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Other] mesh airfoil NACA0012	anand_30	OpenFOAM Meshing & Mesh Conversion	13	March 7, 2022 17:22
[blockMesh] error message with modeling a cube with a hold at the center	hsingtzu	OpenFOAM Meshing & Mesh Conversion	2	March 14, 2012 09:56
channelFoam for a 3D pipe	AlmostSurelyRob	OpenFOAM	3	June 24, 2011 13:06
[blockMesh] BlockMesh FOAM warning	gaottino	OpenFOAM Meshing & Mesh Conversion	7	July 19, 2010 14:11
[blockMesh] Axisymmetrical mesh	Rasmus Gjesing (Gjesing)	OpenFOAM Meshing & Mesh Conversion	10	April 2, 2007 14:00

February 26, 2013, 23:45		#2
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	There are many reasons for negative determinant. Sometimes mesh is al-right but vectors are not and fix is simply fix the determinant. But mostly this is due to penetrating elements into geometry or other blocks due to wrong association or misaligned blocked. The solution may be simple in some cases and in other cases you may have to redo the whole blocking in more innovative way. But keep on trying you will come to know what is causing problem and how to fix it. Sometimes the problem is due to edge mesh parameters.