I am trying to model heat flow in a material using the Heat Transfer in Solids interface of COMSOL (5.1). I would like to include conduction and convection as well. Guidance needed for a new user.
Thank you.
Heat Transfer in Solids can be used to model only conductive heat transfer. Heat Transfer in Fluids can be used to model both conductive and convective heat transfer. When using Heat Transfer in Fluids, your material does not actually need to be a fluid.
@kimmo Sir, thank you for the reply. My material is Calcite and its solid with some porosity, should I still use Heat Transfer (HT) in fluids? I am using an antenna's radiation to find out heat transfer, temperature rise in calcite. Do you think comsol will include conduction in the interface?
If your material is solid, use the Heat Transfer in Solids module with the correct thermal conductivity, density, and heat capacity. The attached link contains a lot of information on thermal properties of rocks.
http://pubs.usgs.gov/of/1988/0441/report.pdf
@Mark Sir, Thank you for the link. I have another question in mind. Suppose I provide input to my antenna for one hour and then i turn off the input, can i use heat that has already propagated in calcite, and will it conduct further through diffusion, radiation etc? Think of it as a Pulse input, is it possible in comsol?
Well, you can model pretty much everything using COMSOL. You can model ohmic heating and conductive-convective heat transfer in porous media. You just have to know what you want and which physics to use and how to couple them. I think you first need to figure out what you want to do. If your material is low porosity then you might want to disregard convection as it is not trivial in porous media. And if you don't have the convenient modules to work with you would have to set it all up yourself. Maybe write your equations in weak form. That is far from trivial. However, very much possible of course.
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