Viscous Effects: Fluid Resistance

This problem is located in Fluid Mechanics by Victor Streeter 5.4. The answers given for this problem are: 0.126 lb, 1.064X 10-6 cfs. The problems states: Determine the force on the piston of Fig. 5.42a due to shear and the leakage from the pressure chamber for U=0. I have sketched Fig. 5.42a in a powerpoint slide and am attaching it. Thank you.

Nonuniform flow compared to avg velocity

Compare a nonuniform flow with the average velocity see attachment

Hydraulic Accumulator Volume and Energy Problem

The diagram on the right shows the cross- section of an accumulator. When the hydraulic system was commissioned, the bladder was charged to a pressure of 50 bar and the volume of gas was 2 litres. What is the volume of the bladder when the system pressure is 200 bar? The accumulator is used in an intermittent application where the system is pumped- up to 200 bar, the pump is switched off and power is supplied by the accumulator until the system pressure drops to 100 bar. Please estimate how much energy is available from the accumulator under these conditions?

Gear pump volume and pressure difference problem

The diagram shows a gear pump. The maximum diameter of the gear wheels is 80 mm, the diameter of the roots of the teeth is 50 mm and the tooth width is 20mm. If the pump is driven at 500 rpm, please estimate the volume of oil pumped every minute. If the pressure difference across the pump is 50 bar, what shaft power has to be provided by the drive motor? You may assume the efficiency of the pump is 80%.

Learning the proper procedures for arranging the problem and proper procedures from first to last steps in solving the problem.

A trapezoidal channel made out of brick, with bottom width 6ft and with bottom slope 0.001, is to carry 600cfs. What should be the side slopes and depth of channel for the least number of bricks? Arrange the problem to solve it.