Draw the thermal circuit diagram

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Reference no: EM131283362

An initially cold T1(t = 0), pure aluminum spherical particle is rolling over a hot surface of temperature Ts at a constant speed ub and is heated through a contact conduction resistance Rk,c. This is shown in Figure Pr. 3.70.

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(a) Draw the thermal circuit diagram.

(b) Is the assumption of a uniform temperature valid? Use Rk,1 = 1/(4πD1k1) for the internal conduction resistance.

(c) Determine the length L the ball has to travel before its temperature reaches Tf . Assume that the contact conduction is the only surface heat transfer (surfaceconvection and radiation heat transfer are assumed negligible).

Reference no: EM131283362

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