Heat transfer coefficient/heat flux BC

buffi · June 5, 2015, 07:48

Hi all,

I have a 2D (x,y) flow with heat transferred into that flow through the walls with normal z, so it's basically a flat heated channel:

htc_view.jpg

"htc" is a field with the local heat transfer coefficient coefficients and I'd now like to solve the temperature field. As a first step, a constant heat flux is sufficient and the wall temperature should be adjusted to allow for the desired heat flux.

How can I impose such a boundary condition? I thought about adapting the fixedGradient BC, but I'm not sure how that would work in my case. Are there other BCs that could work?

Regards

Christoph

rohan1495 · December 4, 2019, 08:05

hi
You mentioned htc- local heat transfer coefficient. My query is about post processing of heat transfer coefficient. The utility wallHeatTransferCoeff is giving error, I have gone through all related threads but still I am figuring it out so any hints for htc calculation or post processing would be appreciated.
Thank you

June 5, 2015, 07:48	Heat transfer coefficient/heat flux BC	#1
buffi Member Join Date: Jan 2011 Posts: 45 Rep Power: 15	Hi all, I have a 2D (x,y) flow with heat transferred into that flow through the walls with normal z, so it's basically a flat heated channel: htc_view.jpg "htc" is a field with the local heat transfer coefficient coefficients and I'd now like to solve the temperature field. As a first step, a constant heat flux is sufficient and the wall temperature should be adjusted to allow for the desired heat flux. How can I impose such a boundary condition? I thought about adapting the fixedGradient BC, but I'm not sure how that would work in my case. Are there other BCs that could work? Regards Christoph

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December 4, 2019, 08:05		#2
rohan1495 New Member rohan majalekar Join Date: Aug 2018 Posts: 3 Rep Power: 7	hi You mentioned htc- local heat transfer coefficient. My query is about post processing of heat transfer coefficient. The utility wallHeatTransferCoeff is giving error, I have gone through all related threads but still I am figuring it out so any hints for htc calculation or post processing would be appreciated. Thank you