Air is contained between two vertical plates spaced 2 cm apart, with the air space evacuated so that the mean free path is equal to the plate spacing One plate is at 400 K with 0 1 while the other plate is at 300 K with 0 15 The accommodation coefficients for the surfaces are 0 9 Calculate the heat transfer between the two plates

Question: Air is contained between two vertical plates spaced 2 cm apart, with the air space evacuated so that the mean free path is equal to

Air is contained between two vertical plates spaced 2 cm apart, with the air space evacuated so that the mean free path is equal to the plate spacing. One plate is at 400 K with ϵ = 0.1 while the other plate is at 300 K with ϵ = 0.15. The accommodation coefficients for the surfaces are 0.9. Calculate the heat transfer between the two plates.

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