Model Heat Transfer with COMSOL

[dccorbes]

Does anyone here have experience with COMSOL?

I want to model a system where i have a fluidic channel containing warm fluid running through a block and I want to analyze the heat transfer from the channel into the block .

To establish the warm fluid I put an initial temperature condition at the inlet of the channel. But I think this limits my model since the heat isn't being "carried" by the fluid down the length of the channel. For example I don't see much difference when varying the flow rate which I would expect.

Does anyone know what would be better boundary conditions for this model? Can I put in an equation for heat flux? What variables should the equation include? Should I apply it to the inlet or the walls of my channel?

Thanks!

 

[gtoguy97]

Yes, I have experience with COMSOL. In this case, you should apply the equation for heat flux to the walls of the channel. The variables that should be included in the equation are the temperature and the thermal conductivity of the wall material, as well as the surface area of the walls. You can also include any additional variables that you feel are relevant to the problem, such as the flow rate or other physical parameters.