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Old   February 15, 2011, 04:59
Default chtmultiregionFoam
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Alpesh Vora
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Hello Friends,

I am looking for the any material for chtMultiRegionFoam. I want to understand the .C and .H files of chtmultiregionfoam. can anyone suggest me any guide book or any other related material for chtmultiregionfoam, please?

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Alpesh
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Old   February 16, 2011, 00:04
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Alvora,

There are two really good threads here involving chtmultiregionFoam in this website.

http://www.cfd-online.com/Forums/ope...egionfoam.html

and
solidWallHeatFluxTemperature at the solid solid interface in chtMultiRegionSimpleFoam

by maddalena

Also,

Cht tutorial in 15

by psosnows.


the one by psosnows is really long.. but has lots of information.

What exactly are you looking for?

I'm also trying to figure out chtmultiregionFoam as I am using it for school research. Let me know if you have any information.

Miguel
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Old   February 16, 2011, 03:19
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Hello Miguel,

Thank you very much for reply.

I am doing simulation for partical partical interaction under applied external electric field. I have to investigate the electric current distribution on particle surface as well as surrounding fluid area. If you have any suggestion, please inform me. Both spherical partical are not in contact. electric potential applied acroos two sphere. I want to find that how much current will transfer from the one particle to fluid and from fluid to onther particle.

In chtmultiregionfoam, the heater and fluid region geometry define in .setSet file. In that, the "cellToBox" commad used and it is for box type geometry. but what about for sphearical geometry? how we can define the sphere inside the cube? I want to define two different sphere as the solid body and surrounding fluid as fluid region.

Again Thank you very much for your interest..

Kind Regards
Alpesh
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Old   February 16, 2011, 03:52
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Quote:
Originally Posted by masuarez View Post
There are two really good threads here involving chtmultiregionFoam in this website.

http://www.cfd-online.com/Forums/ope...egionfoam.html

and
solidWallHeatFluxTemperature at the solid solid interface in chtMultiRegionSimpleFoam

by maddalena
Well... thank you! I wanted to point them out, but it seemed not fair...

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Old   February 16, 2011, 04:17
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Hello maddalena,

Thank you very much..

But y it is not fair?
means chtMultiregionFoam is not correct for my problem or what?

kind regards
Alpesh
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Old   February 16, 2011, 06:37
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Originally Posted by alvora View Post
But y it is not fair?
means chtMultiregionFoam is not correct for my problem or what?
No, no! I did not want to sponsor a thread that I started! But Miguel did that

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Old   February 16, 2011, 10:40
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Alpesh,

I think Maddalena was being modest and did not want to reference her own threads!

As far as your multiRegion Mesh, I followed the "Cht tutorial in 15" at around page 3 where psosnows does a really good job explaining how to get around the .setSet file (which I don't know how to use) when creating solid and fluid regions.

****Keep in mind that i just started using OpenFOAM and i'm not an expert in any way, shape, or form. I'm still trying to figure it out. I had to read "Cht tutorial in 15" several times to understand a multiregion mesh.

Best of luck to you.

P.S. I have seen several threads dealing with a similar topic as yours... i'll try to see if i can find them. Initially, i found them by chance, but i'm sure they are around.

Miguel
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Old   February 16, 2011, 12:42
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Quote:
Originally Posted by masuarez View Post
I think Maddalena was being modest and did not want to reference her own threads!


Quote:
Originally Posted by alvora View Post
In chtmultiregionfoam, the heater and fluid region geometry define in .setSet file. In that, the "cellToBox" commad used and it is for box type geometry. but what about for sphearical geometry? how we can define the sphere inside the cube? I want to define two different sphere as the solid body and surrounding fluid as fluid region.
if you create your mesh with a specific software (Pointwise, Gambit or what else), you can create the model as for fluent and than use the following:
Code:
fluentMeshToFoam myMesh.cas -writeSets
setsToZones -noFlipMap
splitMeshRegions -cellZones -overwrite
This will create the two regions you need.

mad
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Old   February 18, 2011, 05:18
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Hello,

thank you very much maddalena and miguel for your reply. I am trying to figure out.. I will inform if works good..

Thanks alt...
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Old   February 23, 2011, 04:06
Default chtMultiregionFoam, How to run?
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Hello Friends

I am trying to run chtMultiRegionFoam by typing the ./Allrun in terminal window in Openfoam 1.7.1. But, when I looked in VTK folder, there is five different regionname folder is there and every folders contain only one region_1.VTK file.
My question is: When I run the tutuorial MultiRegionHeater, I have to consider some other things or I have to change anything in that tutorial? because I run that tutorial for 200 and also try for 400 sec. but, execution time is same for both case and VTK folder contain same file. So, i think program is not running upto end.
so, is there any speacial treatment for postprocessing or require some change in boundary condition or what?

can anyone give me suggestion, please?

Kind Regards
Alpesh
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