Experimental Study on the Effect of Orientation of Heating Circular Plate on Film Boiling Heat Transfer for Fluorocarbon Refrigerant R-11

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Abstract
The characteristics of film boiling heat transfer from a heated horizontal circular brass plate to a pool of fluorocarbon R-11 are examined for the case in which only the top side of the plate is in contact with the liquid (facing upward) and for the case in which the bottom side of the plate is in contact with the liquid (facing downward). It is found that the film coefficient for the facing downwards orientation of the plate was found to be closely correlated by the following: Nu=0.35(L/CpΔT)Gr0.25·Pr0.25

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