Answer to Question #163371 in Electrical Engineering for Mital sosa

Question #163371

1. Consider a square plate of 0.5 m x 0.5 m in a room at 30 C. One side of the plate is kept at a uniform temperature of 74 C while the other side is insulated. Determine the rate of heat transfer from the plate by free convection under the following three situations: (i) The plate is kept vertical (ii) The plate is kept horizontal with hot surface facing up (iii) The plate is kept horizontal with hot surface facing down.


1
Expert's answer
2021-02-16T07:29:26-0500

The properties of air at the film temperature of

= = and 1 atm here

(a) Vertical. The characteristic length in this case is the height of the plate, which is L = 0.5m. The Rayleigh number is

The natural convection Nusselt number

102.6

and


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