HEAT TRANSFER

Heat transfer refers to the transfer of thermal energy from one substance or system to another as a result of a difference in temperature. There are three primary mechanisms of heat transfer:

1. Conduction: The transfer of heat through direct contact between particles of a solid or through the vibration of particles in a fluid.
2. Convection: The transfer of heat by the movement of fluids, such as air or water, from a hot area to a cold area.
3. Radiation: The transfer of heat through electromagnetic waves, such as infrared radiation, without the need for a physical medium.

Heat transfer is an important concept in many fields, including thermodynamics, mechanical engineering, and building design. The study of heat transfer is used to design and improve heating and cooling systems, engines, and thermal processing equipment, and to understand the impact of thermal processes on the environment.