Hi, I have a tube exposed from the top to solar radiation and contains air inside it, the tube is closed from both ends, I want to calculate the heat transferred from the upper side to the lower side?
Assalamuwalaiqum ,Please follow the link to get your answer. It has a similar problem just need to modify the layers
https://youtu.be/bsHUDz7C4xw
https://youtu.be/qZMW-O-blRU
thank you sajid for your answer, but I need to calculate the heat transmitted from the surface of the upper wall through the air gap to the surface of the lower wall of the tube, knowing that the thickness of the tube is less than 1 mm and the tube is heated by solar radiation from upper wall surface only
Depending on precision, you can try for simple 1D conduction along the wall,
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