# heat conduction between different solids*

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 February 10, 2013, 16:53 heat conduction between different solids* #1 New Member   Reno Join Date: Sep 2012 Posts: 27 Rep Power: 7 where one solid is surrounded by another solid. I am solving heat conduction equation in each solid, so each solid has its own specific heat (c), density and thermal conductivity (k), thus we will solve two coupled time dependent temperature equations. Does laplacianFoam will handle two regions? How about chtMultiRegionFoam. any hint will be great? Last edited by jr33; February 11, 2013 at 14:00.

 February 10, 2013, 22:09 #2 Senior Member   Join Date: Nov 2009 Location: Michigan Posts: 135 Rep Power: 9 Hi Reno, Pure heat conduction in solid: laplacianFOAM attaching of two regions depends on which software you are using for meshing

 February 11, 2013, 12:36 #3 New Member   Reno Join Date: Sep 2012 Posts: 27 Rep Power: 7 Thanks Omkar for comments. I am solving heat equation in each solid, so each solid has its own specific heat, density and thermal conductivity, thus we need to solve two coupled time dependent temperature equations. Does laplacianFoam will work here? How about chtMultiRegionFoam. For meshing, I am using gmsh.

 February 12, 2013, 07:47 #4 Super Moderator     Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 22 If you understand the chtMultiRegionSimpleFoam/multiRegionHeater tutorial you willbe able to set up your case.

 February 12, 2013, 12:40 #5 New Member   Reno Join Date: Sep 2012 Posts: 27 Rep Power: 7 Thanks for comment, by now, I have figured the details of multiRegionHeater. Currently I am stuck at meshing part: I mean: How to define interface between two regions? I use gmsh for meshing, I dont have blockMeshdict file.

February 12, 2013, 13:51
#6
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Philip Cardiff
Join Date: Mar 2009
Location: Dublin, Ireland
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Quote:
 Originally Posted by jr33 where one solid is surrounded by another solid. I am solving heat conduction equation in each solid, so each solid has its own specific heat (c), density and thermal conductivity (k), thus we will solve two coupled time dependent temperature equations. Does laplacianFoam will handle two regions? How about chtMultiRegionFoam. any hint will be great?
Hi,

An alternate method is to use elasticThermalSolidFoam in the solidMechanics branch of OpenFOAM-1.6-ext.
This solver allows for different properties in different regions, check out the bimaterialCase tutorial case for elasticSolidFoam.
elasticThermalSolidFoam solves the energy equation for temperature and then the momentum equation for displacements, obviously you could comment out all the displacement/stress stuff.

One advantage of this method is you just need one mesh with one region and no need to define an interface.

Just an option,
Best,
Philip

 February 12, 2013, 16:41 #7 New Member   Reno Join Date: Sep 2012 Posts: 27 Rep Power: 7 Thanks Philip, I downloaded the 1.6 extend version of openfoam from here: http://www.cfd-online.com/Forums/ope...t-problem.html I did nt see " elasticSolidFoam" case or "solidMechanics" branch, is anyway I can find correct files. Last edited by jr33; February 12, 2013 at 18:55.

 February 13, 2013, 06:29 #8 Senior Member     Philip Cardiff Join Date: Mar 2009 Location: Dublin, Ireland Posts: 638 Rep Power: 23 The solidMechanics code is a git branch on the OpenFOAM-1.6-ext git repository. As the git repository is currently down, I have put ".tgz" of the solidMechanics solvers here. I usually put the solidMechanics directory in the \$FOAM_SOLVERS directory. Best, Philip

 February 15, 2013, 00:36 #9 New Member   Reno Join Date: Sep 2012 Posts: 27 Rep Power: 7 Thanks Philip for the files.

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