Problem 2.254

Find the temperature distribution in the space between two coaxial cylinders of radii $R_{1}$ and $R_{2}$ filled with a uniform heat conducting substance if the temperatures of the cylinders are constant and are equal to $T_{1}$ and $T_{2}$ respectively

T=T_{1}+\frac{T_{2}-T_{1}}{\ln \left(R_{2} / R_{1}\right)} \ln \frac{r}{R_{1}}

Transport Phenomena