Question

Air at 40°C enters a mixing chamber at a rate of 225 kg/s where it mixes with air at 15°C entering at a rate of 540 kg/s. Calculate the temperature of the air leaving the chamber, assuming steady.flow conditions. Assume that the heat loss is negligible.

Answer 1

Air at 40C at atmospheric pressure flows over a flat plate at a velocity of 3 m/s. if the plate is 1 m wide and 80C, the following at x = 300 mm.

So,

Fluid temperature $T= 20°C$

, Velocity$U = 3 m/s$

Wide. $W = 1 m$

Surface temperature$Tw = 80°C$

Distance $x = 300 mm = 0.3 m$