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July 1, 2010, 10:34 |
Time Dependency/ Scale Mesh/ Wall Definition
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#1 |
New Member
Robyn
Join Date: Jun 2010
Posts: 14
Rep Power: 16 |
Hello,
I am fairly new to OpenFoam and thus with that come many questions. In any cases with OpenFoam its dependent on the Courant Number. If I enter the controlDict you can define deltaT. Now my question is in regards to steady state cases. Is deltaT time dependent or time iteration dependent? If time dependent why? Next question: How do you scale the mesh? I have a .msh file created in Gambit (completed the fluentMeshToFoam) simple 2D case (channel flow, d=1m) I would like to scale my geometry but only in the x direction ie, change the diameter to 1 cm instead of 1 m. Is this possible in OpenFoam or does the geometry need to be changed in the originial Gambit file? Final Question: In the boundary field how do I know which wall is which? ie in the icoFoam/elbow case there is 2 walls defined (wall-8, wall-4). |
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July 2, 2010, 05:46 |
ref. Scaling
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#2 |
New Member
Robert Langner
Join Date: Dec 2009
Location: Freiburg, Germany
Posts: 27
Rep Power: 17 |
Hi Robyn,
this might solve your scaling problem: fluentMeshToFoam -case <case> -scaling '(<xFactor> <yFactor> <zFactor>)' just scale x-Direction: '(0.01 1 1)' |
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July 2, 2010, 06:13 |
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#3 |
New Member
Robyn
Join Date: Jun 2010
Posts: 14
Rep Power: 16 |
Thanks for the response! I'll test it out.
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July 2, 2010, 10:50 |
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#4 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,267
Blog Entries: 1
Rep Power: 25 |
hi friend
the correct form of scaling command is like below , if u have any hint which help me to have various scaling in different direction it can be helpful fluentMeshToFoam balbla.msh -scale 0.1 or fluentMeshToFoam balbla.msh -scale '0.1' |
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July 7, 2010, 05:21 |
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#5 | ||
Senior Member
maddalena
Join Date: Mar 2009
Posts: 436
Rep Power: 23 |
Quote:
Code:
fluentMeshToFoam balbla.msh Quote:
mad |
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July 7, 2010, 05:23 |
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#6 | |
Senior Member
maddalena
Join Date: Mar 2009
Posts: 436
Rep Power: 23 |
Quote:
mad |
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July 7, 2010, 07:53 |
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#7 |
New Member
Robyn
Join Date: Jun 2010
Posts: 14
Rep Power: 16 |
Thank you!
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July 7, 2010, 09:07 |
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#8 | |
New Member
Join Date: May 2010
Location: Cologne
Posts: 27
Rep Power: 16 |
Quote:
foamToVTK and then start paraFoam and then open "File/Open" the "VTK"-folder that has been created with foamToVTK. there you can open the main body and the patches, so you can see what is what, by clicking on the "eye" next to the patch name or main body. regards |
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