Heat transfer is classified into various mechanisms, the fundamentals are:
- Advection: is the transport mechanism of a fluid from one location to another, and is dependent on the motion and momentum of that fluid.
- Thermal conduction or diffusion: the transfer of energy between objects that are in physical contact. Thermal conductivity is the property of a material to conduct heat and evaluated primarily in terms of Fourier’s Law for heat conduction.
- Convection: the transfer of energy between an object and its environment, due to fluid motion. The average temperature is a reference for evaluating properties related to convective heat transfer.
- Thermal radiation: the transfer of energy by the emission of electromagnetic radiation.