Convection works by transferring heat between a solid and a fluid, caused by the temperature difference between the two materials. Liquid molecules are moving faster than the solid's molecules, so cooling occurs more quickly than it would between two solids. The fluid takes the heat energy and leaves the solid cooler. Two types of convection exist: free convection and forced convection. Convection cooling occurs faster than radiation cooling, and forced convection can be even more efficient.
Convection works by transferring heat between a solid and a fluid. This phenomenon results from a temperature difference. Liquid molecules are moving faster than the solid's molecules, so cooling occurs more quickly than it would between two solids. The fluid absorbs the heat energy and leaves the solid cooler. Two types of convection exist: free convection and forced convection.
Free convection occurs naturally when a cooler liquid meets a heated solid. Forced convection happens when a cooler air or liquid is forced over a heated solid. Forced convection can occur as a result of a fan or by pumping, and it can be more efficient in cooling than free convection, working in concert with conduction to cool the solid.
Every object radiates thermal energy via temperature. Higher temperatures lead to higher levels of thermal radiation. Every object radiates thermal energy by temperature. Higher temperatures lead to higher levels of thermal radiation, and lower temperatures lead to lower levels of thermal radiation. When two objects' temperatures become unbalanced, it causes the heat radiation to transfer to the lower temperature object until it reaches equilibrium. Temperatures rise with the addition of more thermal energy than the object is currently radiating. Temperatures fall when objects are subjected to less thermal energy than they are radiating. Radiation cooling occurs more slowly than convection cooling.