Heat Transfer I
Lecture 17:Free Convection
Prof: Dr. Ibrahim Hassan
Free Convection
In
free convection, fluid motion is due to buoyancy forces
within the fluid, while in forced convection, it is externally
imposed
Buoyancy is due to the combined presence
Heat Transfer I
Lecture 16: Internal Force
Convection
Prof: Dr. Ibrahim Hassan
Laminar and Turbulent Flow in Tubes
For flow in a circular tube, the Reynolds number is defined as
Re
Heat Transfer I
VavgD
VavgD
Lecture 16
I.Hassan
2
Laminar and Turbulent F
Heat Transfer I
Lecture 18:Radiation Heat Transfer
Prof: Dr. Ibrahim Hassan
Thermal Radiation
Is energy emitted by matter that is at
a finite temperature. The emission may
be
attributed
electron
to
changes
configurations
in
of
the
the
constituent atoms or
Heat Transfer I
Lecture 19:Radiation Heat Transfer
Prof: Dr. Ibrahim Hassan
Radiation Shape Factor
Consider two black surfaces. Obtain a general expression for
the energy exchange between the two surface?
Let us define the radiation shape factors:
F 2 fra
Heat Transfer I
Lecture 20:Radiation Heat Transfer
Prof: Dr. Ibrahim Hassan
Heat Exchange Between Non-black
Bodies
For a non-black bodies, all the energy striking a surface will not
be absorbed, part will be reflected
Assume the surface is diffuse, and un
Solutions Manual
for
Chapter 4
TRANSIENT HEAT CONDUCTION
Heat and Mass Transfer: Fundamentals & Applications
5th Edition
Yunus A. Cengel & Afshin J. Ghajar
McGraw-Hill, 2015
4-15 An iron whose base plate is made of an aluminum alloy is turned on. The time
Chapter 2
HEAT CONDUCTION EQUATION
2-18 The variation of the absorption of solar energy in a solar pond with depth is given. A relation for the total rate of heat
generation in a water layer at the top of the pond is to be determined.
Assumptions Absorpti
Solutions Manual
Heat and Mass Transfer: Fundamentals & Applications
5th Edition
Chapter 5
NUMERICAL METHODS IN HEAT
CONDUCTION
5-19 A plane wall with no heat generation is subjected to specified temperature at the left (node 0) and heat flux at the right
Chapter 1
INTRODUCTION AND BASIC CONCEPTS
1-21 A house is heated from 10C to 22C by an electric heater, and some air escapes through the cracks as the heated air in
the house expands at constant pressure. The amount of heat transfer to the air and its cos
CONCORDIA UNIVERSITY
FACULTY OF ENGINEERING AND COMPUTER SCIENCE
DEPARTMENT OF MECHANICAL AND INDUSTRIAL ENGINEERING
HEAT TRANSFER I
(MECH 352)
Sample Problems
SOOLLVVEE PPAARRTTSS AA AANNDD BB OONNLLYY
SSOOLLVVEE PPAARRTTSS AA AANNDD BB OONNLLYY
Consider
Solutions Manual
for
Chapter 3
STEADY HEAT CONDUCTION
Heat and Mass Transfer: Fundamentals & Applications
5th Edition
Yunus A. Cengel & Afshin J. Ghajar
McGraw-Hill, 2015
3-25 A double-pane window consists of two layers of glass separated by a stagnant ai
Heat Transfer I
Lecture 15: External Force
Convection
Prof: Dr. Ibrahim Hassan
Force Convection
In all previous lecture, convection was consider only as it related
to the boundary condition
In this lecture, we will interested in the empirical method for
p
Heat Transfer I
Lecture 14: Review on Conduction
Heat Transfer
Prof: Dr. Ibrahim Hassan
Fouriers law
q
dT
K
A
dx
(Fourier's Law) (1)
Where: q is the heat flow
K is thermal conductivity (
w
)
mC
A is normal area to q vector (m2 )
dT
C
is the temperature g
Heat Transfer I
Lecture 1: Introduction
Prof.: Dr. Ibrahim Hassan
Department of Mechanical and Industrial Engineering Office: EV4-213 Office Hours: W& F, 4:00 to 5:00 PM, E-mail: IbrahimH@alcor.concordia.ca Website: MyConcordia PORTAL - Moodle
Heat Tran
Heat Transfer I
Lecture 2: Convection and Radiation Heat Transfer Prof: Dr. Ibrahim Hassan Pr f: Dr Ibr him H ss n
Previous Lecture P i L t
Introduction I t d ti Modes of heat transfer Fourier s Fourier's law (Conduction)
q dT = -K A dx
Heat Transfer I
Le
Heat Transfer I
Lecture 3: One Dimensional, Steady State Heat Conduction Prof: Dr. Ibrahim Hassan
Previous Lecture
Introduction to convection heat transfer
q hA(Tw T )
Introduction to radiation heat transfer
qblack body ATs 4
q net, 2 surfaces F F A(T1 4
Heat Transfer I
Lecture 4: Thermal Resistance Concept Prof: Dr. Ibrahim H P f D Ib hi Hassan
Previous Lecture P i L t
One dimensional heat conduction equation General heat conduction equation Boundary and initial condition
Heat Transfer I
Lecture 4
I.Hass
Heat Transfer I
Lecture 5: Two Dimensional,
Steady State Heat Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
Thermal resistance networks
Thermal contact resistance
Multilayer plane wall
Multilayer cylinders and spheres
Critical thickness of insulati
Heat Transfer I
Lecture 6: Conduction-Convection
Systems
Prof: Dr. Ibrahim Hassan
Previous Lecture
Two dimensional conduction steady heat conduction- analytical
method
Heat Transfer I
Lecture 6
I.Hassan
2
Present Lecture
Fin equation
Fin efficiency
Fin ef
Heat Transfer I
Lecture 7: Unsteady State
Heat Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
Fin equation
Fin efficiency
Fin effectiveness
Heat Transfer I
Lecture 7
I.Hassan
2
Present Lecture
Unsteady state heat conduction
Lumped system analysis
Tr
Heat Transfer I
Lecture 8: Unsteady State Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
Unsteady state heat conduction
Lumped system analysis
Transient heat conduction in semi-infinite solids
Heat Transfer I
Lecture 8
I.Hassan
2
Present Lecture
Uns
Heat Transfer I
Lecture 9: Multidimensional Systems
Prof: Dr. Ibrahim Hassan
Previous Lecture
Unsteady State Conduction (Graphical method)
Heat Transfer I
Lecture 9
I.Hassan
2
Present Lecture
Multidimensional System
Heat Transfer I
Lecture 9
I.Hassan
3
Mu
Heat Transfer I
Lecture 10:Numerical Methods in
Heat Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
Multidimensional System
Heat Transfer I
Lecture 10
I.Hassan
2
Present Lecture
Numerical method in heat conduction- one dimensional
Finite
difference
Heat Transfer I
Lecture 11: Two Dimensional
Steady State Heat Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
Numerical method in heat conduction- one dimensional
Finite difference formulation of differential equations
Heat Transfer I
Lecture 11
I.Ha
Heat Transfer I
Lecture 12: Two Dimensional,
Steady State Heat Conduction
Prof: Dr. Ibrahim Hassan
Previous Lecture
2 Dimensional steady-state conduction, numerical analysis
Heat Transfer I
Lecture 12
I.Hassan
2
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2 Dimensional steady state
Heat Transfer I
Lecture 13: Transient
Numerical Method
Prof: Dr. Ibrahim Hassan
Previous Lecture
Two dimensional steady state heat conduction- numerical
method
Heat Transfer I
Lecture 13
I.Hassan
2
Present Lecture
Transient Numerical Method
Heat Transfer