Theory of thermal diffusivity by pulse technique

General solutions of the heat conduction equation are presented for axially symmetric pulse heating of a cylindrical sample with constant surface conditions. The solutions, established by means of Green's functions, are applicable to cases in which the radial and axial components may be treated separately and the heat source function is of the form Q f(x) g(r) ψ(t). Particular results already presented in the literature are derived, as well as more general formulae. Reference is made to a novel form of digital computing technique for finding the values of parameters which give the best correlation of theoretical and experimental temperature-time characteristics.