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Thermal structure coupling:Radiant

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In the default settings of comsol, the thermal radiation absorption and emission coefficients of the material surface are equal. If they are not equal, how to set them?


1 Reply Last Post 11.08.2022, 02:47 GMT-4

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Posted: 2 years ago 11.08.2022, 02:47 GMT-4

The equal of the thermal radiation absorption and emission coefficients is Graybody hypothesis. The actual radiation absorption and emissivity of a material are temperature (wavelength) dependent, so you can set Wavelength correlation of radiation properties as “Multi-spectral bands” or “Sunlight and environment” to get different coefficients.

The equal of the thermal radiation absorption and emission coefficients is Graybody hypothesis. The actual radiation absorption and emissivity of a material are temperature (wavelength) dependent, so you can set Wavelength correlation of radiation properties as “Multi-spectral bands” or “Sunlight and environment” to get different coefficients.

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