A 60 ◦C hot, vertically standing, square plate of dimensions L = b = 1 m has air at a pressure of 0.1 MPa and a temperature of 20 ◦C flowing over it from top to bottom at a velocity of 1 m/s. How much...

A 60 ◦C hot, vertically standing, square plate of dimensions L = b = 1 m has air at a pressure of 0.1 MPa and a temperature of 20 ◦C flowing over it from top to bottom at a velocity of 1 m/s. How much heat does the plate release? The following properties of air at the mean boundary layer temperature of 40 ◦C are given: thermal conductivity λ = 0.0274W/Km, kinematic viscosity ν = 17.23·10−6 m2/s, Prandtl number P r = 0.706. Further, the thermal expansion coefficient at 20 ◦C is β∞ = 1/T∞ = 3.2 · 10−3 K

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