[blockMesh] Dummy vetices in blockMesh file?

A.A. · July 16, 2012, 05:08

Is it possible to write dummy vertices in the blockMesh file which are not used to create a block afterwards and not getting an error?

MartinB · July 16, 2012, 07:00

Hi Alexander,

yes, you can add dummy vertices in the blockMeshDict without using them; there should be no error message.

Martin

Nikunj.R · July 18, 2012, 14:40

The user manual on pg U-126, mentions, "The point list cannot contain two different points
at an exactly identical position nor any point that is not part at least one face"

MartinB · July 18, 2012, 15:11

This point list mentioned in the user guide refers to the points in the final mesh, id est the constant/polyMesh/points, whereas the blockMeshDict file can have dummy points. The dummy points in the blockMeshDict are very useful for debugging purpose and for automatic mesh generation algorithms.

Martin

Nikunj.R · July 18, 2012, 15:14

ohhk, good to know that. Thanks for letting me know.

July 16, 2012, 05:08	Dummy vetices in blockMesh file?	#1
A.A. Member Alexander A Join Date: Jun 2012 Posts: 53 Rep Power: 13	Is it possible to write dummy vertices in the blockMesh file which are not used to create a block afterwards and not getting an error?

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July 16, 2012, 07:00		#2
MartinB Senior Member Martin Join Date: Oct 2009 Location: Aachen, Germany Posts: 255 Rep Power: 21	Hi Alexander, yes, you can add dummy vertices in the blockMeshDict without using them; there should be no error message. Martin

July 18, 2012, 14:40		#3
Nikunj.R Member Nikunj Raithatha Join Date: Jul 2012 Location: Washington DC Posts: 47 Rep Power: 13	The user manual on pg U-126, mentions, "The point list cannot contain two different points at an exactly identical position nor any point that is not part at least one face"

July 18, 2012, 15:11		#4
MartinB Senior Member Martin Join Date: Oct 2009 Location: Aachen, Germany Posts: 255 Rep Power: 21	This point list mentioned in the user guide refers to the points in the final mesh, id est the constant/polyMesh/points, whereas the blockMeshDict file can have dummy points. The dummy points in the blockMeshDict are very useful for debugging purpose and for automatic mesh generation algorithms. Martin

July 18, 2012, 15:14		#5
Nikunj.R Member Nikunj Raithatha Join Date: Jul 2012 Location: Washington DC Posts: 47 Rep Power: 13	ohhk, good to know that. Thanks for letting me know.