When do you want to use shell feature? a)-make a 2d sketch of a gear b)-make a 3d model of a gear box c) make a 2d shell of a shaft (d) make a 3d mate for a cam

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)