Fluid with a viscosity p and density p flows between two ver

Fluid with a viscosity p and density p flows between two vertical parallel planes moving at velocities U_1 and U_2, respectively. A pressure gradient (dp/dz) is applied in the direction of the flow. Starting from the Navier -Stokes equation, determine the velocity profile.

Solution

design a two stage compound reverted gearbox to be used in a small power drill. To meet the requirement of low-torque and high torque setting, design the gearbox for two velocity ratios 8 and 40. the gear box is connected to a 2500 rpm. 10 hp electric motor and must be designed to work at an elavated temprature 400 F. The gears are to be made of 4140 Nitrided Steel