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
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Class Overview
What are my rules?
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Get here on time
Come to class
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Submit your homework
Ask questions at any time
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Even if I don’t entertain you
There are no dumb questions
Respect your classmates
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Class Overview
What are my rules?
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You are becoming engineers, your
work should reflect that
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Homework submission on
engineering paper
Logical sequence of steps that could
be followed by a novice
Identify everything known or given by
the problem
Class Overview
What are my rules?
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You are becoming engineers, your
work should reflect that
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A sketch is always useful in
describing a problem
Identify what you are looking for
Identify all your assumptions
Use units in all steps
Class Overview
What are my goals?
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Give you the opportunity to develop a
sound fundamental background in
fluid mechanics to allow you to utilize
this background in
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The FE exam
Further undergraduate study
Professional practice
Class Overview
Questions for You
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What are your immediate goals (by
the end of the semester)?
What are you willing to do (honestly)
to achieve those goals?
Class Overview
What are you willing to do to
achieve your goals?
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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
Class Overview
Homework
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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
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Class Overview
Toolbox
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You are expected to have a working
knowledge of
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Algebra
Trig
Calculus
Physics
Some computational/programming
system or language
Class Overview
A Quiz
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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
11
Class Overview
A Quiz
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12
How much, in force pounds, does a
gallon of water weigh?
Class Overview
A Quiz
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How much, in Newtons, does a liter
of water weigh?
13
Class Overview
A Quiz
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14
How many gallons of water are in a
cubic foot of water?
Class Overview
A Quiz
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How many liters of water are in a
gallon of water?
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Class Overview
A Quiz
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16
What is the approximate volumetric
flow rate of the water fountain across
the hall in cubic feet per minute?
Class Overview
A Quiz
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About how long would it take the
average garden hose connected to a
residential faucet to fill this
classroom?
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Class Overview
A Quiz
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18
What is the mass density of water in
the USCS system?
Class Overview
A Quiz
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How much does a slug weigh at
standard gravity? Use pounds force
for the weight.
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Class Overview
A Quiz
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Putting a nozzle on the end of a hose
will
1. 
2. 
3. 
4. 
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Increase the velocity of the water
Increase the pressure of the water
Increase the volumetric flow rate of
the water
All of the above
Class Overview
A Quiz
¢ 
Viscosity and density are the same
thing
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True
False
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Class Overview
A Quiz
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Force and pressure are the same
thing
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True
False
Class Overview
A Quiz
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How much, in force pounds, does a
gallon of water weigh?
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8.34 lbf
Class Overview Quiz Solutions
A Quiz
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How much, in Newtons, does a liter
of water weigh?
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1000 N
Class Overview Quiz Solutions
A Quiz
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How many gallons of water are in a
cubic foot of water?
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7.48 gal/ft3
Class Overview Quiz Solutions
A Quiz
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How many liters of water are in a
gallon of water?
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3.785 l/gal
Class Overview Quiz Solutions
A Quiz
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What is the approximate volumetric
flow rate of the water fountain across
the hall in cubic feet per minute?
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0.07 cfm
Class Overview Quiz Solutions
A Quiz
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About how long would it take the
average garden hose connected to a
residential faucet to fill this
classroom?
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Flow rate is about 18 gpm
Volume of the room is about 9400 ft3
Time to fill would be 2 days 17 hours
and 6 minutes
Class Overview Quiz Solutions
A Quiz
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What is the mass density of water in
the USCS system?
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62.4 lbm/ft3
Class Overview Quiz Solutions
A Quiz
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How much does a slug weigh at
standard gravity? Use pounds force
for the weight.
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32.17 lbf
Class Overview Quiz Solutions
A Quiz
¢ 
Putting a nozzle on the end of a hose
will
1. 
2. 
3. 
4. 
Increase the velocity of the water
Increase the pressure of the water
Increase the volumetric flow rate of
the water
All of the above
Class Overview Quiz Solutions
A Quiz
¢ 
Viscosity and density are the same
thing
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True
False
Class Overview Quiz Solutions
A Quiz
¢ 
Force and pressure are the same
thing
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True
False
Class Overview Quiz Solutions
Reading
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34
Through Section 1.3
No homework problems yet.
Class Overview