Temperature Jump boundary condition in openFOAM

hoseinhd · January 18, 2016, 09:23

Dear Foamers,

I'm new to openFoam and my problem is fluid flow in a microchannel.

I'm using buoyantBuossineqSimpleFoam.

Bottom wall is heating with a constant heat flux.

I want to implement a temperature jump on this wall.

How can I implement temperature jump? groovyBCJump? fixedJump boundary condition in openfoam?

Please somebody tell me how should I solve this problem? Have anybody written something like that?

Thanks in advance
hoseinhd

chriss85 · January 18, 2016, 10:19

You can probably use a fixedGradient boundary condition. If you know your temperature conductivity k you can calculate the gradient as grad(T) = q/k.

hoseinhd · January 18, 2016, 12:08

Thanks chriss,
But what should I do for temperature jump at the wall?

chriss85 · January 19, 2016, 05:04

I guess you can use a fixedJump condition, but I haven't looked into it. Just try it and inspect the results with paraview.

January 18, 2016, 09:23	Temperature Jump boundary condition in openFOAM	#1
hoseinhd New Member hossein hadi Join Date: Apr 2015 Posts: 15 Rep Power: 11	Dear Foamers, I'm new to openFoam and my problem is fluid flow in a microchannel. I'm using buoyantBuossineqSimpleFoam. Bottom wall is heating with a constant heat flux. I want to implement a temperature jump on this wall. How can I implement temperature jump? groovyBCJump? fixedJump boundary condition in openfoam? Please somebody tell me how should I solve this problem? Have anybody written something like that? Thanks in advance hoseinhd

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January 18, 2016, 10:19		#2
chriss85 Senior Member Join Date: Oct 2013 Posts: 397 Rep Power: 19	You can probably use a fixedGradient boundary condition. If you know your temperature conductivity k you can calculate the gradient as grad(T) = q/k.

January 18, 2016, 12:08		#3
hoseinhd New Member hossein hadi Join Date: Apr 2015 Posts: 15 Rep Power: 11	Thanks chriss, But what should I do for temperature jump at the wall?

January 19, 2016, 05:04		#4
chriss85 Senior Member Join Date: Oct 2013 Posts: 397 Rep Power: 19	I guess you can use a fixedJump condition, but I haven't looked into it. Just try it and inspect the results with paraview.