W12workshop

# W12workshop - Exploration of Engineering Design EngE 1114...

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Engineering Education EngE 1114, Spring 2009 Exploration of Engineering Design EngE 1114 Week 12 Workshop (fire-up MATLAB)

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Engineering Education Agenda Hands-on MATLAB and flowcharting Functions While loops Relational operators and logical operators Stacked and nested if’s Text string input and output Vectors (almost) all accomplished via ‘Manning’ formula
Engineering Education Given the following scenario: A cylindrical tank filled with water has a valve and a section of piping attached at the bottom. The piping slopes away from the tank and is open at the far end. If the valve sticks in the ‘open’ position, how long will it take to empty the tank? (sketch a diagram of this to test your understanding)

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Engineering Education Rough sketch: valve What will affect the time it takes to empty?
Engineering Education Parameters affecting time-to-empty: Exit velocity Tank diameter Fluid depth in tank (tank height possibly) Viscosity of fluid Temperature of fluid Pressurized tank or tank venting Restriction to flow at valve Is valve at ‘bottom’ of tank Pipe length Pipe diameter or shape Roughness of the inside of the pipe Is pipe full? How much vertical drop is there in the pipe Density of the fluid Local value of gravity Pipe obstructions

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Engineering Education Rough sketch: valve QUICK! How long will it take for the tank to empty?
Engineering Education Note that the time to fill the ‘bucket’ is gallons/second……a flow rate. Let’s plot this vs time: Q flow t, time

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W12workshop - Exploration of Engineering Design EngE 1114...

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