Maurice Tutor

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    Phoniex University
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Category > Management Posted 04 Apr 2018 My Price 5.00

equation qrad/qcond

Two large, black, horizontal plates are spaced a distance L from one another. The top one is warm at a controllable temperature, Th, and the bottom one is cool at a specified temperature, Tc. A gas separates them. The gas is stationary because it is warm on the top and cold on the bottom. Write the equation qrad/qcond = fn(N,T = Th/Tc), where N is a dimensionless group containing s, k, L, and Tc. Plot N as a function of T for qrad/qcond = 1, 0.8, and 1.2 (and for other values if you wish). Now suppose that you have a system in which L = 10 cm, Tc = 100 K, and the gas is hydrogen with an average k of 0.1 W/m·K . Further suppose that you wish to operate in such a way that the conduction and radiation heat fluxes are identical. Identify the operating point on your curve and report the value of Th that you must maintain.

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Maurice Tutor
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Status NEW Posted 04 Apr 2018 07:04 PM My Price 5.00

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