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How to define a surface source term in the energy equation across a flow |
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June 30, 2016, 08:52 |
How to define a surface source term in the energy equation across a flow
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Member
Jeff
Join Date: May 2016
Posts: 44
Rep Power: 9 |
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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