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Trouble understanding Heat Flux integrals
Posted 1 nov. 2019 à 06:29 UTC−4 Fluid, Heat Transfer & Phase Change Version 5.4 4 Replies
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I am working on a model that involves heat flux, with conduction, convection and radiation. In the model I have to compare the losses over the outher boundaries. After running the model, which is 2D axisymmetric, I use a line integral over the boundaries, to obtain a surface integral in 3D. However, the results do not make sense to me, which makes me think that I do not understand the specific integrals correctly. I included a picture of the boundaries and the corresponding values found.
What I do not understand:
Why does it say that there is no convective heat flux when I included convective heat flux in the heat transfer physics interface?
Why is the value for conductive heat transfer so large, when the temperature difference would mean a much larger convective and radiative heat flux?
Why does the total energy flux (which gives the same values as the total heat flux) only include the conductive heat flux?
Can someone tell me how to interpret the given results? It would be greatly appreciated.
Kind regards, Steggink