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Thermal structure coupling：Radiant
Posted 10 ago 2022, 23:31 GMT-4 Heat Transfer, Materials, Structural Mechanics Version 6.0 1 Reply
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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?
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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.