Physics: Ch 24B - Convection: Test Your Knowledge (22 of 26) Natural Convection from a Wall

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We will calculate a) heat lost (cal/hr), dQ/dt=?, from both sides of a VERTICAL wall in still (ambient) air. b) And heat lost (cal/hr), dQ/dt=?, from both sides of a HORIZONTAL wall in still (ambient) air.

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You will be always remembered by your opening words...
*Welcome to

MOHNAKHAN
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Best wishes in 2020! Also, how is the trasmission coeffcient derived? Is it some empirical constant, or maybe it has different values depending on considered medium? Where can I get those values for certain cases?

rafakordaczek
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Hi sir, why didn't you multiply dQ/dt by 2 like u did with conduction? Or does the convection equation consider both sides of the wall already?

oneinabillion