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Too high radiation

Posted Mar 23, 2012, 9:50 a.m. EDT Heat Transfer & Phase Change Version 4.2 0 Replies

Marie Seltveit Haugen
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I have modeled two walls with a radiation shield between, in 2D. The walls and the shield are made opaque and I have surface-to-surface radiation on the four inner boundaries (and insulation on the two outer). The two walls have different constant temperatures.

lxxl lxl lxxl

x-opaque domain, l-boundary.

I want to obtain the irradiation on the right wall, and I use a line integration over this boundary.
But the result I get here for the irradiation is higher than the radiosity at the left side at the shield, and even higher than the radiosity at the left wall (which has the highest constant temperature).

It looks to me like COMSOL is allowing radiation through the opaque radiation shield? How can I obtain the correct irradiation at the right wall?
0 Replies Last Post Mar 23, 2012, 9:50 a.m. EDT
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Hello Marie Seltveit Haugen

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