# Laplacian Solver. Assigning different transport properties

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 November 23, 2009, 05:59 Laplacian Solver. Assigning different transport properties #1 New Member   Join Date: Nov 2009 Posts: 11 Rep Power: 9 Hello, i'm trying to solve the following problem using LaplacianFoam: Temperature distribution in a solid consisting of two regions which have different heat transfer coefficients. How can one assign the transport properties (Heat coefficient in LaplacianFoam) to different regions? The reason is to estimate the distribution of temperature through insulation containing several layers. Any ideas how do solve it? Maybe another solver? Last edited by mks; November 23, 2009 at 09:45. Reason: Adding information

 November 24, 2009, 09:53 Problem seems to be solved. #2 New Member   Join Date: Nov 2009 Posts: 11 Rep Power: 9 I think i could solve the problem. For those who is interested in solution: I modified the standard solver LaplacianFoam. In the createFields.H I have changed the way, DT is read in just like the Temperature Field: Info<< "Reading diffusivity D\n" << endl; volScalarField DT ( IOobject ( "DT", runTime.timeName(), mesh, IOobject::MUST_READ, IOobject::AUTO_WRITE ), mesh ); Now in temestep 0/ folder create the file DT by copying+modifying the T file. I used the SetFieldsDict in system folder for assigning the DT values to the cell volumes: defaultFieldValues ( volScalarFieldValue DT 4e-04 ); regions ( boxToCell { box ( 0 0 0 ) ( 1.5 3 0.1 ); fieldValues ( volScalarFieldValue DT 1e-04 ); } ); After compiling the new solver and running it i got a temperature distribution that seems to be right. MarkW, Arslan Arshad, liub and 2 others like this.

 April 7, 2015, 20:20 #3 New Member   Join Date: Mar 2015 Posts: 25 Rep Power: 4 can you share your case here?

 April 8, 2015, 01:59 #4 New Member   Join Date: Nov 2009 Posts: 11 Rep Power: 9 Hi Arslan, yes I could share it, but it is not possible to attach here files larger than 97KB... Give me you email, so I can sent it to you.

 April 8, 2015, 16:33 #5 New Member   Join Date: Mar 2015 Posts: 25 Rep Power: 4 arslan.arshad786@yahoo.com THANK YOU

 April 20, 2015, 10:04 #6 New Member   Join Date: Mar 2015 Posts: 25 Rep Power: 4 I did not get your mail. Please send it to the email given below: arslan.arshad786@yahoo.com

 February 16, 2017, 03:36 #7 Member   Colli, Alejandro Join Date: Jan 2014 Posts: 49 Rep Power: 5 Can u share ur example with me? ancolli@gmail.com Thanks

 February 16, 2017, 05:57 #8 New Member   Join Date: Nov 2009 Posts: 11 Rep Power: 9 Hi Alejandro, just sent an email to you!

 June 19, 2017, 08:18 Req #9 New Member   karthik Join Date: Jun 2016 Posts: 5 Rep Power: 3 Hi, I've been trying to do this for a while now.. Can any of you please mail me the modified solver files? ID: ktk04spiker@gmail.com

 Tags heat transfer, laplacianfoam, laplacianschemes, multiregion, temperature

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