- (physics) The convection (carriage) of contents of a fluid, such as mass or (especially) heat, by means of currents induced in the fluid by a buoyancy force which is dependent on an acceleration (such as gravity) acting upon density changes in the fluid which are induced by heat.
- The draft of a chimney due to a fire in a fireplace, and the rising of smoke particles from a fire, are due to free convection.
- The transfer of heat from a hot object by means of upward hot air currents from the object, is due to free convection.
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