Nieustalone przewodzenie ciepła ciał o dużej przewodności cieplnej w warunkach konwekcji swobodnej w powietrzu

The paper presents a solution of the problem of unsteady heat transfer in bodies of high thermal conducitivity; at the surface of the body the heat is exchanged under the conditions of free convection. Calculations are made in the case of air convection. The results obtained are compared with those evaluated under the assumption of a constant heat transfer coefficient.