Hi! I have extra wall surfaces in the interior I want can't remove

japan25 · August 22, 2014, 19:52

Hi!

I am trying to generate a box shell (outer box with dimensions 6 by 6 by 10) and inner dimensions (5.5 by 5.5 by 10).

I have attached my blockMeshDict file, Geometry generated (of1.jpg), mesh generated (of2.jpg), and erroneous wall patch (of3.jpg).

What this does is it prescribes wall boundaries in the interior of the problem which isn't correct. I need to fix it.

Initially I tried to specifically specify faces with walls - no slip. But that gave me error of no neighbouring cells. I tried changing the ordering of my vertices with face definitions but it kept on giving me the same error. I have that commented out in the blockMeshDict file.

If someone could please help, I'd be really grateful.

Thanks,
Japan

blockMeshDict.txt

of1.jpg

of2.jpg

of3.jpg

ngj · August 23, 2014, 02:44

Good morning,

You need more than 4 blocks to mesh that geometry in blockMesh. Interfaces between blocks should be matching, which they do not in the attached mesh.

Please see more on blockMesh in the UserGuide.

Kind regards,

Niels

japan25 · September 7, 2014, 19:08

Sir,

I tried it again, this time with matching internal faces but I still couldn't get rid of that effect. What should I do?

Is there a boundary condition like interior boundary - that way I could just specify those faces as interior.

Thanks!

August 22, 2014, 19:52	Hi! I have extra wall surfaces in the interior I want can't remove	#1
japan25 New Member Japan Patel Join Date: Aug 2014 Posts: 3 Rep Power: 11	Hi! I am trying to generate a box shell (outer box with dimensions 6 by 6 by 10) and inner dimensions (5.5 by 5.5 by 10). I have attached my blockMeshDict file, Geometry generated (of1.jpg), mesh generated (of2.jpg), and erroneous wall patch (of3.jpg). What this does is it prescribes wall boundaries in the interior of the problem which isn't correct. I need to fix it. Initially I tried to specifically specify faces with walls - no slip. But that gave me error of no neighbouring cells. I tried changing the ordering of my vertices with face definitions but it kept on giving me the same error. I have that commented out in the blockMeshDict file. If someone could please help, I'd be really grateful. Thanks, Japan blockMeshDict.txt of1.jpg of2.jpg of3.jpg

August 23, 2014, 02:44		#2
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,900 Rep Power: 37	Good morning, You need more than 4 blocks to mesh that geometry in blockMesh. Interfaces between blocks should be matching, which they do not in the attached mesh. Please see more on blockMesh in the UserGuide. Kind regards, Niels __________________ Please note that I do not use the Friend-feature, so do not be offended, if I do not accept a request.

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September 7, 2014, 19:08		#3
japan25 New Member Japan Patel Join Date: Aug 2014 Posts: 3 Rep Power: 11	Sir, I tried it again, this time with matching internal faces but I still couldn't get rid of that effect. What should I do? Is there a boundary condition like interior boundary - that way I could just specify those faces as interior. Thanks!