Convection is the photography gods power due to the founding of the medium such as air or water, where convection is divided into two styles, hassle-free convection and convection, forced convection, i.e. freedom to movement of air with density changes of air temperature change, because of the material and the air to circulate through the surface. In the section of a forced convection, resulting from the use of devices that make intermediates through the skin like material using natural wind pump or fan.In the case of material of high temperature than the temperature of the flow.
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