The totals heat transfer rates in the case of natural and forced convection over a heated vertical flat plate: In natural convection, any fluid motion is caused by natural means such as the buoyancy effect, i.e. the rise of warmer fluid and fall of the cooler fluid.
Whereas in forced convection, the fluid is forced to flow over a surface or in a tube by external means such as a pump or fan.
Forced convection increases the fee of warmth transfer in comparison to natural convection. The charge of the heat switch in compelled convection relies upon the rate of air. The better the airspeed, the higher might be the rate of warmth switch. pressured convection involves fluid movement in addition to conductive warmth transfer.
The overall equation for the case of pressured convection is Nu = f(Re, Pr). within the case of loose convection, it's miles Nu = f(Gr, Pr). in which Tp is the surface temperature.
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