Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow ).

2022年9月18日 · The three types of heat transfer differ according to the nature of the medium that transmits heat: Conduction requires contact. Convection requires fluid flow. Radiation does not require any medium. Conduction is heat transfer directly between neighboring atoms or molecules. Usually, it is heat transfer through a solid.

Convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids. The initial heat transfer between the object and the fluid takes place through conduction, but the bulk heat transfer happens due to the motion of the fluid.

2025年1月22日 · convection, process by which heat is transferred by movement of a heated fluid such as air or water. Natural convection results from the tendency of most fluids to expand when heated—i.e., to become less dense and to rise as a result of the increased buoyancy .

Heat energy transferred between a surface and a moving fluid with different temperatures - is known as convection. In reality this is a combination of diffusion and bulk motion of molecules. Near the surface the fluid velocity is low, and diffusion dominates.

2024年11月2日 · Convection is a process of heat and mass transfer in fluids that occurs naturally in the atmosphere, oceans, and Earth’s interior and is widely applied in engineering. Understanding convection provides insight into everything from weather patterns and ocean currents to industrial processes and the interior dynamics of stars. What Is Convection?

Convection is a way for heat to move, also referred to as a heat transfer mechanism. This transfer of heat happens when a fluid such as air or water is in motion. Convection is driven by temperature differences across that fluid.

Convection is heat transfer by the macroscopic movement of mass. Convection can be natural or forced and generally transfers thermal energy faster than conduction. The table gives wind-chill factors, indicating that moving air has the same chilling effect of much colder stationary air.

2023年1月2日 · Convection is the heat transfer process from one region to another due to the movement of fluids like air or water. The initial heat transfer occurs through conduction, but the primary transfer occurs through convection. It is the dominant form of heat transfer in liquids and gases. Convection is of two types – natural and forced.

2023年3月29日 · Convection is one of the ways heat can be transferred from one place to another. It only happens in liquids and gases, and relies on the differences in density between hot matter and cold matter. Convection is important for weather, baking, the Earth's magnetic field and the Sun's plasma flow.