I'm having a bit of trouble with a Thermal Physics excercise. I was wondering if anyone knew what the definition of the heat transfer coefficient was? I can't find anything about it in my textbook (Thermal Physics, 2nd ed., C.B.P. Finn). More specifically, the assignment at hand says to find the temperature [tex]T(r)[/tex] in a hollow cyllinder with length [tex]L[/tex] (where [tex]r[/tex] is the distance from the axis of the cyllinder, so that the cyllinder is symmetric about this axis), inner radius [tex]r_1[/tex], outer radius [tex]r_2[/tex], inner wall is kept at temperature [tex]T_1[/tex] and outer wall temperature is kept at [tex]T_2[/tex] (temperature of the surroundings), after equilibrium has been reached. The material of the cyllinder has heat transfer coefficient [tex]H[/tex]. Also, [tex]T_2<T_1[/tex]. (It also asks explicitly if the result depends on [tex]H[/tex].) Any tips or hints to get me started?