Consider concentric annulus with inner radius i r and outer radius o r . There is no axial flow. The outer surface is fixed and the inner surface rotates with constant angular velocity. The annulus space is occupied by a Non-Newtonian fluid [ ( )n dV dr     ]. Develop an equation for friction coefficient, mean velocity

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.