Chemical Engineering > GATE 2025 > Heat Conduction
A hot plate is placed in contact with a cold plate of a different thermal conductivity as shown in the figure. The initial temperature (at time t=0) of the hot plate and cold plate are Th and Tc, respectively. Assume perfect contact between the plates.
Which one of the following is an appropriate boundary condition at the surface S for solving the unsteady state, one-dimensional heat conduction equations for the hot plate and cold plate for t>0?
A
Temperature at S is same for both the plates
B
Gradient of temperature at S is same for both the plates
C
Gradient of temperature vanishes at S
D
Temperature at S is the average of Th and Tc

Correct : a

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