Periodically contacting finite regions - Apparent limit heat resistance for null or infinite contact durations

The knowledge of heat transfer between periodically contacting metallic surfaces is necessary in numerous engineering applications. The analytical solution for quasi-steady state heat transfer in periodically contacting finite regions was first given by MIKHAILOV [1], and then by VICK and OZISIK [2]. These solutions are revisited. The limit cases at infinite or nul contact duration are studied. It is shown that the apparent limit resistances of the system are: [GRAPHICS] These expressions are convenient physical tools easier to implement than the exact analytical solution.