HEAT TRANSFER
_Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy and heat between physical systems. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation,
and transfer of energy by phase changes. Engineers also consider the
transfer of mass of differing chemical species, either cold or hot, to
achieve heat transfer. While these mechanisms have distinct
characteristics, they often occur simultaneously in the same system