1 definition by 42 is the answer
Introduction:
The convection Heat transfer process can be divided into two broad categories (a) when the flow is generated due to an external forcing agent, such as a fan, pump, natural breeze, forced breeze, generated breeze, motion of a heated object, and (b) when the fluid motion arises simply because of density differences caused by temperature differences in a body force field, such as gravity... zzz... zzz...
The convection Heat transfer process can be divided into two broad categories (a) when the flow is generated due to an external forcing agent, such as a fan, pump, natural breeze, forced breeze, generated breeze, motion of a heated object, and (b) when the fluid motion arises simply because of density differences caused by temperature differences in a body force field, such as gravity... zzz... zzz...
by 42 is the answer November 24, 2010