# Convection

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[[Image:Convection.jpg|'''[[Convection]]''' is the movement of molecules within '''[[fluids]]''' (i.e. '''[[liquids]]''', '''[[gases]]''' and rheids). It cannot take place in '''[[solids]]''', since neither bulk current flows or significant diffusion can take place in solids. Convection is one of the major modes of '''[[heat transfer]]''' and mass transfer.|thumb|300px]] | [[Image:Convection.jpg|'''[[Convection]]''' is the movement of molecules within '''[[fluids]]''' (i.e. '''[[liquids]]''', '''[[gases]]''' and rheids). It cannot take place in '''[[solids]]''', since neither bulk current flows or significant diffusion can take place in solids. Convection is one of the major modes of '''[[heat transfer]]''' and mass transfer.|thumb|300px]] | ||

- | '''[[Convection]]''' is the movement of molecules within '''[[fluids]]''' (i.e. '''[[liquids]]''', '''[[gases]]''' and rheids). It cannot take place in '''[[solids]]''', since neither bulk current flows or significant diffusion can take place in solids. Convection is one of the major modes of '''[[heat transfer]]''' and mass transfer. Convective 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. | + | '''[[Convection]]''' is the movement of molecules within '''[[fluids]]''' (i.e. '''[[liquids]]''', '''[[gases]]''' and rheids). It cannot take place in '''[[solids]]''', since neither bulk current flows or significant diffusion can take place in solids. |

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+ | Convection is one of the major modes of '''[[heat transfer]]''' and mass transfer. | ||

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+ | Convective 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. | ||

## Revision as of 09:16, 11 June 2011

** Convection** is the movement of molecules within

**fluids**(i.e.

**liquids**,

**gases**and rheids). It cannot take place in

**solids**, since neither bulk current flows or significant diffusion can take place in solids.

Convection is one of the major modes of **heat transfer** and mass transfer.

Convective 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.

## Also see

## Reference

Wikipedia see *Convection* [1]

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