Natural convection in openFOAM

teofil · October 8, 2022, 12:23

I would like to simulate a buoyantSimpleFoam in a box with an imposed temperature on a patch like a heat source and a free convection on the walls of the box that is like a certain coefficient, let me say h, time the difference of temperature of the box and the ambient temperature, let me say 20°C for example.
The classical: Power Loss[W]=h(T-Tamb)
Anyone could explain me wich BC I could use?

Regards, Alex

Alczem · October 10, 2022, 04:59

Hey!

I think that the externalWallHeatFluxTemperature condition is what you are looking for.

https://www.openfoam.com/documentati...alarField.html

October 8, 2022, 12:23	Natural convection in openFOAM	#1
teofil New Member Rovera Alessandro Join Date: Nov 2010 Location: Dronero (CN) Piemonte Italy Posts: 12 Rep Power: 15	I would like to simulate a buoyantSimpleFoam in a box with an imposed temperature on a patch like a heat source and a free convection on the walls of the box that is like a certain coefficient, let me say h, time the difference of temperature of the box and the ambient temperature, let me say 20°C for example. The classical: Power Loss[W]=h(T-Tamb) Anyone could explain me wich BC I could use? Regards, Alex

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October 10, 2022, 04:59		#2
Alczem Senior Member Join Date: Dec 2021 Posts: 235 Rep Power: 5	Hey! I think that the externalWallHeatFluxTemperature condition is what you are looking for. https://www.openfoam.com/documentati...alarField.html