ENGR 2097: Fluid Mechanics
Lecture 1: Introduction
Dr. Junfeng Zhang
Office: F224, Ext. 2248
Email: jzhang@laurentian.ca
What are Fluids?
Water
Air
Fluids inside our Bodies
Fluids in Motion: Water
Fluids in Motion: Air
Moving in Fluids or on Fluid Surface
ENGR 2097 Fluid Mechanics I
Assignment #9
Solutions
11-31
Solution
Water flow in a rectangular channel is considered. The character of flow, the flow velocity, and
the alternate depth are to be determined.
Assumptions The specific energy is constant.
Anal
ENGR 3526 Assignment #7
Problems
Q1
25
Q2
25
Q3
25
Q4
25
Q1: As shown in the figure below, water is flowing through a 15-cm-diameter
pipe and discharges vertically downward to air at 7 m/s. The mass of pipe
section when filled with water is 15 kg per mete
ENGR 2097 Fluid Mechanics I
Assignment #1
Q1
20
Q2
20
Q3
20
Q4
20
Q5
20
Q1: A 50-cm30-cm20-cm block weighing 150 N is to be
moved at a constant velocity of 0.8 m/s on an inclined surface
with a friction coefficient of 0.27. (a) Determine the force F that
ENGR 3526 Assignment #5
Problems
Q1
15
Q2
35
Q3
20
Q4
30
Q1: An airplane flies at a speed of 800 km per hour at an altitude of 3000 m. If the boundary layers on
the wing surfaces can be approximated as those on a flat plate, estimate the extent of laminar
18
16
14
12
10
Total Head (m)
System
pump
8
6
4
2
0
0
20
40
60
Capacity (L/min)
80
100
120
Density
Specific
Weight
Kinematic
Viscosity
Length
Diameter
Area
Roughness
p
y
9319.5 N/m3
v
L
D
A
7.24E-07 m2/s
1.75 m
0.02093 m
3.439E-04 m2
1.50E-04
Relative
D/
Assignment # 2
Due Date 2:30 pm Monday January 31, 2011
*There will be quiz from 3:00 to 3:15 on Wednesday Jan. 26.
P1- A 15 [cm] diameter steel cylinder is to be machined in a lathe (i.e., fixed axes rotation). The
cutting speed is to be 3000 [cm/min]. D
ENGR 2097 Assignment #6 Problems
(25 marks each)
Q4: A necked-down section in a pipe flow,
called a venturi, develops a low throat pressure
which can aspirate fluid upward from a reservoir,
as shown in the figure below. Using Bernoullis
equation, derive a
IV - 1
Objective:
To determine the quantitative difference between materials that form a glass structure
and materials that form a crystal structure. The lab used thermal analysis to determine these
properties due to the different rates of cooling.
Theory
Macroeconomic
Problems,
Microeconomic
Peter J. Boettke
Solutions
Econ 881/Spring 2005
February 28
Main Points to Stress
Macroeconomic problems are coordination problems
Production plans must mesh with consumption demands
Incentives must be aligned and cap
ANSWERS TO END-OF-CHAPTER PROBLEMS
CHAPTER 6
Quick Check
1.
a.
b.
c.
d.
e.
f.
g.
h.
2.
False.
False.
False. 44% of unemployed workers leave the unemployment pool each month.
True.
False.
Uncertain/False. Most workers have some bargaining power, depending
III - 1
Objective:
The purpose of this experiment was to develop and compare concretes that can
undertake 25 MPa in compressive strength both with and without air entrainment. The
specimen was subject to a slump test, and several compressive strength test
Should smoking be banned in public
places?
Critical Thinking
Inquiry and Critical analysis
C. Blais, PHD
ACEX 1006 EL-01
Name: Keli Zhang
Student Number: 0314098
Many governments in North America or European have the idea about a ban on
smoking in public
Air Pollution
by
Factory Activities
By: Keli Zhang
Ziqian
Huang
Shafa
Algallaf
Outline
Introduction
Cause
Global Warming
Acid Rain
Health is Influenced by PM2.5
Conclusion
References
Introduction
What is air pollution?
The causes of air pollution
Factorie
I-1
Objective:
The purpose of this experiment was to determine the grading curve and the fineness
modulus for 3 samples of fine aggregate and investigate the grain size distribution in 3 samples
of coarse aggregate. The data obtained was also compared to
ENGR 3526 Assignment #3
Problems
Q1
15
Q2
10
Q3
10
Q4
15
Q5
20
Q6
10
Q7
20
Q1: A two-dimensional diverging duct is being designed to diffuse
the high-speed air exiting a wind tunnel. The x-axis is the centerline
of the symmetric duct, and the wall is to b
ENGR 3526 Assignment #4
Problems
Q1
15
Q2
40
Q3
15
Q1: A water droplet in a rain cloud has diameter D = 42.5 m. The
air density is 1.184 kg/m3 and viscosity is 1.849 10-5 kg/ms. The
density of water is assumed as 997.0 kg/m3. Find out how fast the air
has