A very thick slab with thermal diffusivity 5.6x10-6 m2/s and thermal conductivity 20 W/m.K js initially at a uniform temperature of 325 oC. Suddenly, the surface is exposed to a coolant at 15 oC for which the convection heat transfer coefficient is 100 W/m2 .K.--> Determine temperatures at the surface and at a depth of 45 mm after 3 min have elapsed. tially at a uniform temperature of 325°C. Suddenly, the10- m/s and thermal conductivity 20 W/m K is ini-5.91 A very thick slab with thermal diffusivity 5.6 Xsurface is exposed to a coolant at 15°C for which theconvection heat transfer coefficient is 100 W/m² ·K.(a) Determine temperatures at the surface and at adepth of 45 mm after 3 min have elapsed.

Given, x→0 to0.45 mt=3 min or 180 sα=5.6×10-6 m2/sk=20 W/mKh=100 W/m2K

A very thick slab with thermal diffusivity 5.6x10-6 m2/s and thermal conductivity 20 W/m.K js initially at a uniform temperature of 325 oC. Suddenly, the surface is exposed to a coolant at 15 oC for which the convection heat transfer coefficient is 100 W/m2 .K. --> Determine temperatures at the surface and at a depth of 45 mm after 3 min have elapsed.

A very thick slab with thermal diffusivity 5.6x10-6 m2/s and thermal conductivity 20 W/m.K js initially at a uniform temperature of 325 oC. Suddenly, the surface is exposed to a coolant at 15 oC for which the convection heat transfer coefficient is 100 W/m2 .K. --> Determine temperatures at the surface and at a depth of 45 mm after 3 min have elapsed.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.62P

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

A very thick slab with thermal diffusivity 5.6x10^-6 m²/s and thermal conductivity 20 W/m^.K js initially at a uniform temperature of 325 ^oC. Suddenly, the surface is exposed to a coolant at 15 ^oC for which the convection heat transfer coefficient is 100 W/m² ^.K.

--> Determine temperatures at the surface and at a depth of 45 mm after 3 min have elapsed.

tially at a uniform temperature of 325°C. Suddenly, the
10- m/s and thermal conductivity 20 W/m K is ini-
5.91 A very thick slab with thermal diffusivity 5.6 X
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.

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