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January 13, 2014, 12:28 |
wallGradU does not work in OF 2.2.2
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#1 |
New Member
Lee
Join Date: Oct 2011
Posts: 15
Rep Power: 14 |
Hi All,
I run utility wallGradU for cases solving by rhoCentralFoam but it generates the gradient of velocity at the wall of zero. This is wrong answer. Can someone check this ? Sung-Ki |
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February 10, 2014, 16:05 |
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#2 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
Greetings Sung-Ki,
I've taken a look into this and wallGradU works perfectly fine. The detail is that it's configured to only work on walls. For example, if after the mesh is generated, you run this command: Code:
patchSummary -constant Code:
wall : top scalar p zeroGradient scalar T fixedValue vector U fixedValue patch : inlet scalar p fixedValue scalar T fixedValue vector U fixedValue patch : outlet scalar p zeroGradient scalar T zeroGradient vector U zeroGradient symmetryPlane : bottom scalar p symmetryPlane scalar T symmetryPlane vector U symmetryPlane empty : frontAndBack scalar p empty scalar T empty vector U empty In addition, when post-processing the case in ParaView, to visualize the "wallGradU" field, make sure you have loaded the patches of type "wall" in the "Mesh parts" section, as shown in the attached image. Best regards, Bruno
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February 12, 2014, 02:30 |
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#3 |
New Member
Lee
Join Date: Oct 2011
Posts: 15
Rep Power: 14 |
Thanks Bruno for your response. That's great.
I also have a problem with snGrad() function that I posted at http://www.cfd-online.com/Forums/ope...heat-flux.html I will be appreciated if you can help me to figure out it. Sung-Ki |
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