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How to define a surface source term in the energy equation across a flow

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Old   June 30, 2016, 08:52
Default How to define a surface source term in the energy equation across a flow
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Jeff
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Hi foamers

I am facing the following problem:

a stream of air in a pipe passes through an electrically heated gauze.
I need to estimate air température downstream the gauze and gauze peak temperature. (pressure drop can be initially neglected).

I need to add a "heating" source term to the energy equation for that purpose.(also the heating power will be function of temperature so I will use a swak4foam expression).

To the best of my knowledge (please correct me if I am wrong), I can use fvOption only if I model the heat source as a volume source in a layer around the gauze. This is a problem in my context for the following reasons:

1 If I choose the thickness of this layer as the thickness of the gauze it creates ridiculously small and umpractical mesh.

2- if I choose larger mesh I underestimate the peak temperature which is not good for practical reason

My questions:
Is there an existing way ( ideally materialized through an example /tutorial) to define a surface heat source on a patch across the flow?
Any recommandation how to tackle this configuration?

Thanks a lot
JF
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