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5 Feb 2012 22:04:58 IST

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transfer of heat

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in convection the heat transfers vertically upwards than wats the logic used in convection microwave model because in that the heat transfers from three directions ????

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Viraat Gupta

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Joined: 21 Jun 2011

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12 Feb 2012 04:04:11 IST

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Convective heat transfer, or convection, is the transfer of heat from one place to another by the movement of fluids, a process that is essentially transfer of heat via mass transfer.Free, or natural, convection occurs when bulk fluid motion (steams and currents) are caused by buoyancy forces that result from density variations due to variations of temperature in the fluid. Forced convection is a term used when the streams and currents in the fluid are induced by external means?such as fans, stirrers, and pumps?creating an artificially induced convection current

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