The equation governing the diffusion of heat in a conductor. It states
where is the density, is the heat capacity and constant pressure, is the change in temperature over time, Q is the heat added, k is the thermal conductivity, is the temperature gradient, and is the divergence. Eric Weisstein's World of Math
Heat Conduction Equation, Heat Diffusion
References
McGee, H.; McInerney, J.; and Harrus, A. "The Virtual Cook: Modeling Heat Transfer in the Kitchen." Physics Today 52, 30-36, Nov. 1999.
