|July 1, 2013, 10:36||
Emissivity’s dependence on thickness?
Join Date: Jul 2013
Posts: 4Rep Power: 2
I'm completely new to CFD and would like to ask some entry-level questions:
In some flow simulation softwares they usually requires specifying emissivity for surfaces, such as in Solidworks Flow Simulation this might appear as:
but there is a question on the exact definition for this: it ϵ thickness-dependent?
According to http://en.wikipedia.org/wiki/Emissivity:
Although it is common to discuss the "emissivity of a material" (such as the emissivity of highly polished silver), the emissivity of a material does in general depend on its thickness. The emissivities quoted for materials are for samples of infinite thickness (which, in practice, means samples which are optically thick) — thinner samples of material will have reduced emissivity.I wonder in doing the calculations, does Solidworks (and other more sophisticated software) make any adjustment according to the actual thickness of a surface?
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