About Heat Transfer. Convection is the movement of heat by a fluid such as water or air. Radiation heat transfer is mediated by electromagnetic radiation known as thermal radiation that arises due to the temperature of a body.
When part of a solid absorbs heat energy the atoms vibrate faster and with bigger amplitude. The rate of heat transfer depends upon the temperatures of each entity and the medium through which the thermal energy is being transferred. Radiation heat transfer is mediated by electromagnetic radiation known as thermal radiation that arises due to the temperature of a body.
By conduction by convection and by radiation.
The convection heat transfer is usually described by the newtons law of cooling namely 314 q h a t s 2 t where h in wm 2 k 1 is the convective heat transfer coefficient a is the surface area ts2 is the surface temperature and t is the bulk temperature of the fluid. As the air or liquid is heated it travels away from. It may also be transferred by the principle of convection which is air or a liquid being heated. Heat can be transferred in three ways.