Civil Engineering Hydraulics Mechanics of Fluids Overview.pdf · 14 January 2011 1 Civil...
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Civil Engineering Hydraulics Mechanics of Fluids Fundamentals Class hours 9:10 to 10:05 Textbook: Introduction to Fluid Mechanics, William S. Janna, Third Edition (you can use the Fourth Edition) Third Edition is available from Dr. Marchetta on the third floor. We will use an “Engineering Clicker” for the class Class Overview 2
Transcript of Civil Engineering Hydraulics Mechanics of Fluids Overview.pdf · 14 January 2011 1 Civil...
14 January 2011
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Civil Engineering Hydraulics Mechanics of Fluids
Fundamentals
¢ Class hours 9:10 to 10:05 ¢ Textbook: Introduction to Fluid
Mechanics, William S. Janna, Third Edition (you can use the Fourth Edition)
¢ Third Edition is available from Dr. Marchetta on the third floor.
¢ We will use an “Engineering Clicker” for the class
Class Overview 2
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Class Overview 3
What are my rules?
¢ Get here on time ¢ Come to class
l Even if I don’t entertain you ¢ Submit your homework ¢ Ask questions at any time
l There are no dumb questions ¢ Respect your classmates
Class Overview 4
What are my rules?
¢ You are becoming engineers, your work should reflect that l Homework submission on
engineering paper l Logical sequence of steps that could
be followed by a novice l Identify everything known or given by
the problem
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Class Overview 5
What are my rules?
¢ You are becoming engineers, your work should reflect that l A sketch is always useful in
describing a problem l Identify what you are looking for l Identify all your assumptions l Use units in all steps
Class Overview 6
What are my goals?
¢ Give you the opportunity to develop a sound fundamental background in fluid mechanics to allow you to utilize this background in l The FE exam l Further undergraduate study l Professional practice
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Class Overview 7
Questions for You
¢ What are your immediate goals (by the end of the semester)?
¢ What are you willing to do (honestly) to achieve those goals?
Class Overview 8
What are you willing to do to achieve your goals? ¢ This class meets three hours a week ¢ As an average, a student would
spend at least nine hours outside of class to get a B
¢ This usually holds true for every class not just this one
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Class Overview 9
Homework
¢ You can expect to have at least one problem but no more than four problems for any assignment
¢ Even if you don’t complete the assignment, submit what you have for evaluation
¢ Something is always better than nothing
Class Overview 10
Toolbox
¢ You are expected to have a working knowledge of l Algebra l Trig l Calculus l Physics l Some computational/programming
system or language
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Class Overview 11
A Quiz
¢ The following slides each have a question
¢ Please answer them the best you can ¢ Do not use any sort of calculation
device (phone, calculator, etc.) all you need is a pencil and paper
Class Overview 12
A Quiz
¢ How much, in force pounds, does a gallon of water weigh?
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Class Overview 13
A Quiz
¢ How much, in Newtons, does a liter of water weigh?
Class Overview 14
A Quiz
¢ How many gallons of water are in a cubic foot of water?
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Class Overview 15
A Quiz
¢ How many liters of water are in a gallon of water?
Class Overview 16
A Quiz
¢ What is the approximate volumetric flow rate of the water fountain across the hall in cubic feet per minute?
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Class Overview 17
A Quiz
¢ About how long would it take the average garden hose connected to a residential faucet to fill this classroom?
Class Overview 18
A Quiz
¢ What is the mass density of water in the USCS system?
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Class Overview 19
A Quiz
¢ How much does a slug weigh at standard gravity? Use pounds force for the weight.
Class Overview 20
A Quiz
¢ Putting a nozzle on the end of a hose will
1. Increase the velocity of the water 2. Increase the pressure of the water 3. Increase the volumetric flow rate of
the water 4. All of the above
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Class Overview 21
A Quiz
¢ Viscosity and density are the same thing l True l False
Class Overview 22
A Quiz
¢ Force and pressure are the same thing l True l False
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Class Overview Quiz Solutions
A Quiz
¢ How much, in force pounds, does a gallon of water weigh?
l 8.34 lbf
Class Overview Quiz Solutions
A Quiz
¢ How much, in Newtons, does a liter of water weigh?
l 1000 N
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Class Overview Quiz Solutions
A Quiz
¢ How many gallons of water are in a cubic foot of water?
l 7.48 gal/ft3
Class Overview Quiz Solutions
A Quiz
¢ How many liters of water are in a gallon of water?
l 3.785 l/gal
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Class Overview Quiz Solutions
A Quiz
¢ What is the approximate volumetric flow rate of the water fountain across the hall in cubic feet per minute?
l 0.07 cfm
Class Overview Quiz Solutions
A Quiz
¢ About how long would it take the average garden hose connected to a residential faucet to fill this classroom?
l Flow rate is about 18 gpm l Volume of the room is about 9400 ft3
l Time to fill would be 2 days 17 hours and 6 minutes
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Class Overview Quiz Solutions
A Quiz
¢ What is the mass density of water in the USCS system?
l 62.4 lbm/ft3
Class Overview Quiz Solutions
A Quiz
¢ How much does a slug weigh at standard gravity? Use pounds force for the weight.
l 32.17 lbf
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Class Overview Quiz Solutions
A Quiz
¢ Putting a nozzle on the end of a hose will
1. Increase the velocity of the water 2. Increase the pressure of the water 3. Increase the volumetric flow rate of
the water 4. All of the above
Class Overview Quiz Solutions
A Quiz
¢ Viscosity and density are the same thing l True l False
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Class Overview Quiz Solutions
A Quiz
¢ Force and pressure are the same thing l True l False
Class Overview 34
Reading
¢ Through Section 1.3 ¢ No homework problems yet.
