Steam enters a nozzle operating at steady state at 4 MPa, 280 oC with a velocity of 70 m/s. The exit pressure and temperature are 0.7 MPa and 165.0 oC, respectively. During testing it was observed that no water condensed at the exit. The mass flow rate is 4 kg/s. Neglecting the heat transfer and potential energy, determine:(a) the exit velocity in m/s, (b) the inlet and exit flow areas.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)