Question

In which methods of heat transfer, gravity does not play any part?

Answer 1

According to thermodynamic systems, heat transfer is defined as the movement of heat across the border of the system due to a difference in temperature between the system and its surroundings. Heat can travel from one place to another in several ways. The different modes of heat transfer include:

1. Conduction: The transfer of heat by direct contact between the molecules is known as conduction. Eg: The heat we feel when we touch something hot.
2. Convection: The transfer of heat due to the moment in fluids is known as convection, the fluids carry the heat along with them. Eg: Ocean currents are the best example of convection
3. Radiation: The transfer of heat through electromagnetic waves is known as Radiation. Eg: The heat we feel when we stand in the sunlight.

Gravity does not play any part in radiation and conduction because in both these processes heat is transferred without any motion of the medium particles.