A 12 cm thick wall has a thermal diffusivity of 1.5 x 10-6 m2/s and initially a uniform temperature of 85 °C is found. Suddenly the temperature of the outer surface drops to 20 °C while the other is perfectly insulated. Using the finite difference method, with a distance increment of 30 mm and a time increment of 300 s, determine the temperature distribution (T = f(x) ) at 49 minutes. What is the temperature in the middle of the wall at that moment?

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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.