A plane wall of thickness 2L = 4 cm and thermal conductivity k = 10 W/mK is subjected to a uniform heat generation rate of q = 1000 W/m3. The wall is initially at a uniform temperature of T_i = 20°C. Suddenly, the left face of the wall is exposed to a fluid at T∞ = 100°C, with a convection heat transfer coefficient of h = 100 W/m2K. Determine the temperature distribution in the wall at t = 10 s.

ρc_p * ∂T/∂t = k * ∂^2T/∂x^2 + q

T(x,t) = T∞ + (T_i - T∞) * erf(x / (2 * √(α * t))) + (q * L^2 / k) * (1 - (x/L)^2)

The following is a sample problem and solution from the "Incropera Principles of Heat and Mass Transfer solution pdf":

T(x,t) = 100 + (20 - 100) * erf(x / (2 * √(0.01 * 10))) + (1000 * 0.02^2 / 10) * (1 - (x/0.02)^2)

where α is the thermal diffusivity, which is given by:

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