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

#1 
Member
zakir
Join Date: Nov 2011
Posts: 43
Rep Power: 6 
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 
Member
zakir
Join Date: Nov 2011
Posts: 43
Rep Power: 6 
Does anyone can give me some suggestions?I am really in trouble with it.
Thank you! zakir 

June 10, 2012, 13:44 

#3 
Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,507
Blog Entries: 36
Rep Power: 96 
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
__________________
I'll be at OFW11 in Portugal 

June 11, 2012, 01:16 

#4 
Member
zakir
Join Date: Nov 2011
Posts: 43
Rep Power: 6 
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  
Assistant Moderator
Bernhard Gschaider
Join Date: Mar 2009
Posts: 3,920
Rep Power: 41 
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  
Member
zakir
Join Date: Nov 2011
Posts: 43
Rep Power: 6 
Quote:
what kind of boundary condition should I use for electric potential (3D)? regards! zakir 

June 12, 2012, 05:03 

#7 
Member
zakir
Join Date: Nov 2011
Posts: 43
Rep Power: 6 
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 
New Member
Peter L.
Join Date: Sep 2012
Posts: 1
Rep Power: 0 
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
Rep Power: 6 
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 

Tags 
mhd problem 
Thread Tools  
Display Modes  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
UDF for 3rd Kind Boundary Condition  Ismail  FLUENT  2  October 26, 2015 02:57 
Boundary Condition for granular temperature Theta  cheng1988sjtu  OpenFOAM Programming & Development  1  June 1, 2012 23:15 
Mixed/Robin boundary condition  aaev  OpenFOAM Bugs  2  December 15, 2011 15:03 
How to set the Heat Flux boundary condition at Outlet  creddy_trddc  CFX  3  September 21, 2011 07:44 
New topic on same subject  Flow around race car  Tudor Miron  CFX  15  April 2, 2004 06:18 