Temperature gradient using wall-functions
Hi,
I am calculating a channel flow including heat transfer. I'm using the k-epsilon model and pisoFoam solver. Since the flow is incompressible, I added the temperature energy equation to the solver, similar to the following link: http://openfoamwiki.net/index.php/Ho...ure_to_icoFoam The mesh I use is a high-Re mesh, and therefore I have to use wall-functions. To calculate the heat flux at the wall (constant temperature) I need the temperature gradient at the wall. Now the question: Is there a (relatively) simple approach in calculating the this temperature gradient using the wall function equations? (something similar to the tool wallShearStress) I think a similar tool within Fluent would be the wall function heat transfer coefficient. To compare: the wallShearStress tool gives good results concerning the shear stress, while calculating the shear stress using the wallGradU-tool gives far too small values Thanks a lot for your help /Andreas |
Dear Andreas
Did you find solution for this problem? I also want to calculate heat flux of a wall in OF-ext4.0, I use wallGradT.C in https://github.com/positroncascade/wallGradT and compile successfully. But when I want to use that in controlDict with bellow code, that give error wallGradT1 { type wallGradT; functionObjectLibs ("libutilityFunctionObjects.so"); enabled true; outputControl outputTime; patches (top bottom); } if you find any solution, please favor me. |
just type wallGradT in terminal at the end of simulation.
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