Re: Convection in a domestic space (beginner)

Tue, 16 Mar 2010 15:40:40 +0000

I thought I would attach a file along with the problem, essentially I have tried to adapt the free convection example in the comsol documentation.

The solution does not converge, I read that the navier stokes may need a good inital guess in order to help it converge. I was wondering what is the best strategy to do this as i dont know what the flow set up will be!

thanks very much

James

Convection in a domestic space (beginner)

Mon, 15 Mar 2010 20:29:28 +0000

The problem I am trying to model is that of a radiator heating a room.
I am intending to use the model to see how long it takes the room to warm up so that there is an even
temperature distribution. Once this is found, a fan will be placed somewhere in the room to set up a forced convection cycle. Then I want to be able to find out if this can heat up the centre of the room quicker.

I am new to Comsol and - only having some knowledge of Ansys for vibration problems - I am a little unsure on how to go about fixing the problem.

Currently I have been following some of the tutorials from comsol help or the model gallery, but I cannot find a solution that converges when I try to adapt them to my model.

I was wondering how best to set up the heat transfer boundary conditions? I know some heat has to be lost in the model but i am unsure how to set this up realistically.

When the solver stops, the (junk) solution that was given showed the convection current in the velocity field as i expected it, but the heat does not seem to be transferring with the fluid flow.

Thank you very much for any help you can offer.

James

COMSOL Forums: Convection in a domestic space (beginner)

Re: Convection in a domestic space (beginner)

Convection in a domestic space (beginner)