The temperature field in a hollow cylinder due to a source moving along a helix

We solve the problem of the temperature distribution in a hollow cylinder due to a source moving along a helix on the outer surface with boundary conditions of the second kind. The solution can be used to calculate temperature fields on a computer for various forms of processing materials.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 20, No. 1, pp. 154–156, January, 1971.