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BC for Boltzmann radiation on external wall

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Old   May 19, 2016, 17:18
Default BC for Boltzmann radiation on external wall
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Dear all,
Im trying to simulate the cooling down of a solid over time due to radiative energy transport. So my domain consists of only the solid (its walls are external walls) and the domain looses energy due to Boltzmann radiation.
Does anyone know of a BC that allows to do that.
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