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19 March, 14:14

Consider steady one-dimensional heat conduction through a plane wall, a cylindrical shell, and a spherical shell of uniform thickness with constant thermophysical properties and no thermal energy generation. The geometry in which the variation of temperature in the direction of heat transfer will be linear is (a) Cylindrical wall (b) Plane shell (c) Spherical shell (d) All of them (e) None of them

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  1. 19 March, 14:24
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    Plane shell which is option b

    Explanation:

    The temperature in the case of a steady one-dimensional heat conduction through a plane wall is always a linear function of the thickness. for steady state dT/dt = 0

    in such case, the temperature gradient dT/dx, the thermal conductivity are all linear function of x.

    For a plane wall, the inner temperature is always less than the outside temperature.
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