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Temperature gradient as a boundary condition

Posted Oct 8, 2012, 4:17 p.m. EDT Heat Transfer & Phase Change Version 4.2 2 Replies

Farhad
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Hy

I am trying to get temperature distribution on a 3D object because of laser radiation (heat input surface is xy plane). I need to set a boundary condition as DT/Dz=0. Can anyone tell me how to set DT/Dz=0 as a boundary condition?

--Farhad
2 Replies Last Post Oct 9, 2012, 3:01 p.m. EDT
Jesus Lucio
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Posted: 1 decade ago Oct 9, 2012, 8:18 a.m. EDT
HI, Farhad

I think it is equivalent to "Thermal Insulation" (or "Zero Flux") condition, which is the default boundary cond. in Heat problems.

Jesus.
HI, Farhad I think it is equivalent to "Thermal Insulation" (or "Zero Flux") condition, which is the default boundary cond. in Heat problems. Jesus.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Oct 9, 2012, 3:01 p.m. EDT
Hi

I'm not sure, I would say rather "open boundary", even if the formula for a symmetry = thermal insulation for an X-Y plane and the d/dz component looks like "=0", as nz = 1

--
Good luck
Ivar
Hi I'm not sure, I would say rather "open boundary", even if the formula for a symmetry = thermal insulation for an X-Y plane and the d/dz component looks like "=0", as nz = 1 -- Good luck Ivar

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