Fluent Grid Check: Left-handed & right handed face

September 16, 2007, 23:37

Hi:

I am using Gridgen as preprocessor to generate grids. Grid is looking fine, no negative volumes. But when I read case in FLUENT 6.3.26, It gives error during GRID CHECK

zone-3: (wall) 71- Left handed Zone-5: (Interior) 191-Right handed

I have alogned all blocks (structured), Re-initialize unstructured blocks. But it is giving same problem.

The grid is hybrid.

Any solution to eleminate this error.

Thanks

Haider

September 17, 2007, 10:25

You can usually correct this by using the GUI - Grid/Reorder/Domain. This will automatically correct the right handed and left handed faces. Hope this helps. --SV

wangyifei · March 22, 2009, 01:37

Quote:

Originally Posted by SV
;145448

You can usually correct this by using the GUI - Grid/Reorder/Domain. This will automatically correct the right handed and left handed faces. Hope this helps. --SV

does no work for your methods,what can I do .
there is the error as follow:
recordering domain using reverse cuthill-mckee method:
bandwidth reduction=1.02
checking face handedness
319 left-handed

paka · March 22, 2009, 23:01

If you use Gridgen it means you can also use Pointwise, it is just newer version of Gridgen much more user friendly. Personally, I really recommend it to you (www.pointwise.com).

Regarding to your problem, make sure all your grid block axes conform with main model axes. If not these may result in negative volumes (as it is called in fluent), surface normal vectors do not conform with "screen depth" (z or y?) axis.

It is possible in Gridgen/Pointwise to select all surfaces and set one as a 'master' one, then select all the others and set 'align'

Regards

September 16, 2007, 23:37	Fluent Grid Check: Left-handed & right handed face	#1
Haider Guest Posts: n/a	Hi: I am using Gridgen as preprocessor to generate grids. Grid is looking fine, no negative volumes. But when I read case in FLUENT 6.3.26, It gives error during GRID CHECK zone-3: (wall) 71- Left handed Zone-5: (Interior) 191-Right handed I have alogned all blocks (structured), Re-initialize unstructured blocks. But it is giving same problem. The grid is hybrid. Any solution to eleminate this error. Thanks Haider

September 17, 2007, 10:25	Re: Fluent Grid Check: Left-handed & right handed	#2
SV Guest Posts: n/a	You can usually correct this by using the GUI - Grid/Reorder/Domain. This will automatically correct the right handed and left handed faces. Hope this helps. --SV

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March 22, 2009, 23:01		#4
paka Senior Member Join Date: Mar 2009 Posts: 225 Rep Power: 18	If you use Gridgen it means you can also use Pointwise, it is just newer version of Gridgen much more user friendly. Personally, I really recommend it to you (www.pointwise.com). Regarding to your problem, make sure all your grid block axes conform with main model axes. If not these may result in negative volumes (as it is called in fluent), surface normal vectors do not conform with "screen depth" (z or y?) axis. It is possible in Gridgen/Pointwise to select all surfaces and set one as a 'master' one, then select all the others and set 'align' Regards