What is Convection?
Convection is the transfer of heat from one place to another made possible by the flow of fluids or liquids, and it happens in both liquids and gases. Fluid expands and loses density when it is heated. As it moves upward, the heated fluid pushes down towards the heat source, separating the cold fluid that was above it. Fluid will constantly move from a region of high heat to low heat as the cold fluid warms up and rises upward.
Examples
- Using a burner to heat water.
- Land and sea breeze
- In contrast to an oven that only uses heating components or a gas flame, a convection oven circulates heated air while cooking more equally.
- Warm air rises, cools, and lowers.
- Ice melting.
Difference Between Conduction, Convection And Radiation
Thermal energy travels from one location to another during heat transmission. All matter transfers heat because atoms and molecules have dynamic and thermal energy by nature. Heat transfer is the flow of heat as a result of a temperature differential between a system and its surroundings. Temperature and heat movement are the basic principles of heat transfer. There are three different kinds of heat transfer depending on the type of medium used to convey heat that is: Conduction, Convection, and Radiation. Conduction is the direct transmission of heat energy and convection is the movement of heat caused by the actual movement of matter, while radiation is the transfer of energy using electromagnetic waves.