Mechanical and Materials Engineering Homework Solutions

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 att ...continues

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 applicati ...continues

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 ...continues

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.

What does the speed of a pressure wave through a pipe depend upon?

What does the speed of a pressure wave through a pipe depend upon?

How to change to SI units.

The density of a substance is 2.94g/cm. In SI units, what is its (a) specific gravity (b) specific volume, and (c) specific weight?

Resistance/Ascent Model Testing

The resistance to the ascent of a balloon is to be determined by studying the ascent of a 1:50 scale model in water. How would such a model study be conducted and the results converted to prototype behavior?

Determine the speed and height of a surge wave.

A rectangular channel is discharging 50 cfs per foot of width at a depth of 10ft when the discharge upstream is suddenly increased to 70 cfs/ft. What is the speed and height of the surge wave.

How do I find my dimensional parameters?

In flows past solid bodies, the force exerted on the body by the fluid motion depends upon the fluid velocity u, the density p, the viscosity, and the principal dimension of the body L. What are the dimensional parameter for the given conditions?

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