Hi all,

I am at my wits' end. I need to study heat transfer through a chimney.

Up till now, I have tried all sorts of methods...but i just couldn't get my flow going.

I am doing a 2D modeling.

Anyone can help me by suggesting way to model the heat source?

I tried specifying the bottom wall as the boundary condition, with a heat flux value. I tired inserting a radiator at the base of the chimney.

Anyone have any suggestion as to how i can heat up my flow at the base of the chimney??

Millions of thanks to whoever that helps me.

Hi,

what kind of chimney? (materials, shape, etc..) what are your assumptions?

Hi JB, Thanks for your reply.

It's a chimney made of concrete. The shape will be rectangle in 2D. The wall will be insulated.

That's all. As simple as it sounds, but i can't get it work.

Hope you can bring some light to me. Thanks!

Ok,

I never had to modelize free convection, but I guess that's what it is.... I think you should define at one point 2 temperatures: 1 would be the temperature of your oven, or whatever. the other one would be the outside temperature. I don't know anything about how to modelize free convection, but I'm sure you can find some data on the web Hope this will help!

cheers jb

thanks JB,

My heat source has to be specified by either a constant heat flux or heat generation rate, not by constant temp.

Anyway, thanks for ur help