What is the term for heat transfer due to the movement of a fluid?

The term for heat transfer due to the movement of a fluid is convection. This process involves the transfer of heat through the circulation of fluids, which can include liquids and gases. When a fluid is heated, it becomes less dense and rises, while cooler fluid moves in to take its place. This movement of fluid creates a cycle that facilitates the transfer of heat.

Convection plays a significant role in various natural processes, such as atmospheric phenomena and ocean currents, as well as in engineering applications like heating systems and cooling processes.

In contrast, sublimation refers to the transition of a substance from solid to gas without passing through the liquid phase, while radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation. Conduction, on the other hand, is the transfer of heat through direct contact between materials, where heat moves from a hotter object to a cooler one without the bulk movement of the material itself.