Air at 20 c and 1 atm flows over a flat plate at 35 m/s. the plate is 75 cm long and is maintained at 60 с. assuming unit depth in the x direction, calculate the heat transfer from the plate.

Q=3198.744 W/m

Explanation:

Given that

Air temperature=20 C

Velocity V= 35 m/s

Temperature of surface= 60 C

Length of plate= 75 cm

Now first find the properties of air at mean temperature of 20 and 60,it means that  properties of air at  temperature 40 C

Pr=0.71

Lets find the Reynolds number

So this is turbulent flow

Nusselt equation of turbulent flow

Now by putting the values

Nu=2961.68

We know that

So

So heat transfer

Q=hAΔT

Q=106.68 x 0.75 x 1 x (60-20)

Q=3198.744 W/m