In the paper a solution of the inverse heat conduction problem with the
Neumann boundary condition is presented. For finding this solution the
homotopy perturbation method is applied. Investigated problem consists in
calculation of the temperature distribution in considered domain, as well as
in reconstruction of the functions describing the temperature and the heat
flux on the boundary, in case when the temperature measurements in some
points of the domain are known. An example confirming usefulness of the
homotopy perturbation method for solving problems of this kind are also
included.