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A plate of length 30 mm in the direction of the flow, a width of 45...

A plate of length 30 mm in the direction of the flow, a width of 45 mm and thickness of 1mm, has a surface temperature of 78oC is placed in a stream of air at a temperature of 30oC and velocity of 3.5m/s . Calculate:

  • The heat loss from the top and bottom of the plate
  • The heat loss from a cylinder 5cm long and has the same volume as the plate and placed across the flow.

for air: ν= 18.4×10-6 m2/s, Pr = 0.704, k = 0.0282 W/m⋅K.

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