Solved: Consider the thick slab of copper in Example
Chapter 5, Problem 5.143(choose chapter or problem)
Consider the thick slab of copper in Example 5.12,which is initially at a uniform temperature of 20C andis suddenly exposed to large surroundings at 1000C(instead of a prescribed heat flux).(a) For a surface emissivity of 0.94, calculate the tem-peratures T(0, 120 s) and T(0.15 m, 120 s) using thefinite-element software FEHT. Hint: In the Convec-tion Coefficienbox of the Specify/Boundary Condi-tionsmenu of FEHT, enter the linearized radiationcoefficient (see Equation 1.9) for the surface(x?0). Enter the temperature of the surroundingsin the Fluid Temperaturebox. See also the Helpsec-tion on Entering Equations. Click on Setup/Temper-atures in Kto enter all temperatures in kelvins.(b) Plot the temperature histories for x?0, 150, and600 mm, and explain key features of your results.
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