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June 6, 2012, 22:51 
what kind of boundary condition should I use

#1 
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zakir
Join Date: Nov 2011
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Dear all
I am simulating an MHD problem .liquid metal flows in a rectangular duct with external magnetic field.Now I run into trouble with the boundary conditions.I attached my details step here: Can you give me some suggestion about the boundary condition of phi(BC)? Thank you! zakir 

June 10, 2012, 08:08 

#2 
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zakir
Join Date: Nov 2011
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Does anyone can give me some suggestions?I am really in trouble with it.
Thank you! zakir 

June 10, 2012, 13:44 

#3 
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Bruno Santos
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Location: Lisbon, Portugal
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Greetings Zakir,
OK, you mention the kind of problem you want to solve, but you haven't mentioned yet which solver you are trying to use! Best regards, Bruno
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June 11, 2012, 01:16 

#4 
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zakir
Join Date: Nov 2011
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Thanks for your attention.
I use a solver I wrote myself.It contains the knowdge about finite area method and finite volume method.First I need solve the 3D electric potential equation all the fluid field with initial boundary condition.And then I have to solve a 2D electric potential equation (just like the file I have attached) on the boudary of fluid field. Then I need to use the solution of the 2D electric potential equation as the new boundary condition of solving 3D electric potential equation in the fluid field at the next time step. I wrote my solver just as the attached file. Have I expressed my point clearly? Thank you for your advice. zakir Last edited by zakir hussain; June 11, 2012 at 10:35. 

June 11, 2012, 04:31 

#5  
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Bernhard Gschaider
Join Date: Mar 2009
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Quote:
What you want is a FAM to FVMcoupling right. Something like Code:
volSurfaceMapping mapper(famField.mesh()); mapper.mapToVolume(famField, fvmField.boundaryField()); PS: please don't send around duplicates of your question via EMail 

June 11, 2012, 10:48 

#6  
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zakir
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Quote:
what kind of boundary condition should I use for electric potential (3D)? regards! zakir 

June 12, 2012, 05:03 

#7 
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zakir
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Does the initial boundary condition in 0 dictionary paly a role in every time step ? For example when solving the 3D electric potential equation ,does the inputing file of 3D electric potential in 0 dictionary have influence on the solving in every time step?
regards! zakir Last edited by zakir hussain; June 15, 2012 at 00:49. 

September 7, 2012, 08:33 

#8 
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Peter L.
Join Date: Sep 2012
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Hi zakir hussein and others,
which version of OF are you using? I was out of touch from OF for a few years, and it seems the the FAM is not part of OF2.1! Any suggestions? It looks like you are using FAM, so I thought you could help... Thx, Peter 

September 7, 2012, 09:17 

#9 
Member
zakir
Join Date: Nov 2011
Posts: 43
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Hi Peter
As I know,The FAM only exists at OF1.6.ext.I still have many problem about that.We can discuss together. regards! zakir 

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