An accumulator receives two streams of water. the first state is saturated steam at 0.6 mpa, the second is at 0.6 mpa and 600 ºc. at the output the temperature is 400 ºc, with pressure equal to the input. considering that the accumulator is adiabatic, calculate the entropy generation.

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)