A very thick slab with thermal diffusivity 5.6 x 10 -6 m 2 /s and thermal conductivity
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A very thick slab with thermal diffusivity 5.6 x 10-6 m2/s and thermal conductivity 20 W/m ∙ K is initially at a uniform temperature of 325°C. Suddenly, the surface is exposed to a coolant at 15°C for which the convection heat transfer coefficient is 100 W/m2 ∙ K.
(a) Determine temperatures at the surface and at a depth of 45 mm after 3 min have elapsed.
(b) Compute and plot temperature histories (0 < t < 300 s) at x = 0 and x = 45 mm for the following parametric variations: (i) a = 5.6 X 10-7, 5.6 x 10-6, and 5.6 X 10-5 m2/s; and (ii) k = 2, 20, and 200 W/m ∙ K.
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Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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