Natural Convection Heat Transfer. Natural convection is a type of flow of motion of a liquid such as water or a gas such as air in which the fluid motion is not generated by any external source but by some parts of the fluid being heavier than other parts. Natural convection is the heat transfer due to the movement of liquid or air molecules.
Depending on the geometry and flow pattern natural convection is divided into. Natural convection heat transfer 121421 slide 14 natural convection in natural convection the fluid motion occurs by natural means such as buoyancy. Molecular movement occurs due to density difference which is a function of temperature.