problem with constant wall heat flux
i want to use a fixed heat flux boundary condition in a conjugate heat transfer problem i use fixedGradient boundary condition on T ;
gradient uniform 10.417;
i know that
heatflux = thermal conductivity (k) * tempreature gradient (dT/dN)
so for k=12 , heatflux=125 w/m2 >> gradient=heatflux/k=10.417
please help me ,, is that right to describe my constant heat flux (125 w/m2) in OpenFOAM ..
thank you very much ..
this is the right way. Go on like this. ;)
hello, i am trying to set up something similar where i have a constant heat flux.
in my case i have lamps heating up air in a room.
my question is: would k be a property of the air? or of the lamp
It depends on where you are fixing the heat flux. If you have simulated the lamp then you use the conductivity of the lamp. If you haven't simulated the lamp then you have to calculate the convective heat transfer coefficient (hc) or you can fix a HeatFlux boundary condition.
multiregion solid conduction
I am also trying to do something similar and the option to fix the Gradient of T works fine but only if you have solids with the same k (thermal conductivity). If there are different domains with different k's the results are not as expected comparing with COMSOL or FLUENT applying the actual heat flux boundary value.
Has anyone dealt with something like this in ChtMultiRegionFoam if yes any advice would be really helpful!!!
Thanks in advance
heat flux setting
I have case that their is constant heat flux from ground and i put it 500 w/m2
but their is a problem that it is not effect the density of the air or it's velocity
during solving and after calculation
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