Maurice Tutor

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Category > Management Posted 28 Oct 2017 My Price 4.00

thermal conductivity

A very thick slab with thermal diffusivity 5.6 × 10-6m2/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) α = 5.6 10-7, 5.6 10-6, and 5.6 × 10-5 m2/s; and (ii) k = 2, 20, and 200 W/m ∙ K.

 

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Maurice Tutor
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Status NEW Posted 28 Oct 2017 08:10 PM My Price 4.00

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