convection is the movement of molecules within fluids and hreids. It cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids. convection is one of the major modes of heat transfer and mass transfer. convection heat and mass transfer take place through both diffusion, the random Brownian motion of individual particles in the fluid, and by advection in which matter or heat is transported by the larger-scale motion of currents in the fluid. in the context of heat and mass transfer, the term " convection" is used to refer to the sum of advective and diffusive transfer
advection refers to transport with the mean fluid flow. for example, if the wind is blowing toward the east, advection will carry any pollutants present in the atmosphere toward the east. similarly, if a bag of dye is emptied in to the center of river, advection will carry the resulting spot of dye downstream
is it similar to diffusion in heat transfer
what is Brownian motion
what is the driving force of thí motion
is it similar to diffusion in heat transfer