External Flow:
Flow over Bluff Objects
(Cylinders, Spheres, Packed Beds)
and
Impinging Jets
Chapter 7
Sections 7.4 through 7.8
Cylinder in Cross Flow
The Cylinder in Cross Flow
Conditions depend on special features of boundary layer development, includin

CHEN 323 Homework for 11/24/03
(Each problem valued at 20 points) (Answers are approximate because some were solved with slightly different equations from the 323 text book) 1. 45,000 lb/hr of a 35 API distillate (Cp = 0.6 BTU/(lb F) is cooled from 2

Due date: Apr-09-2015 (In Class)
CHEN 323-500
Homework #7
1) (25 Points) Problem 7.51; Incropera, et al., 7/e
2) (25 Points) Problem 7.54 (a,b, and c) ; Incropera, et al., 7/e
3) (25 Points) Problem 7.108; Incropera, et al., 7/e
4) (25 Points) (25 Points)

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 1
Name: _
Instruction:
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When you sit in the room, hav

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 1
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, hav

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 1
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, hav

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 2
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, hav

10.2 Fourier Series
Later in this chapter you will nd that you can solve many important problems involving partial differential equations, provided that you can express a given function
as an innite sum of sines and/or cosines. In this and the following t

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 3
Name: _
Instruction:
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the question.
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When you sit in the room, hav

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 2
Name: _
Instruction:
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the question.
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When you sit in the room, hav

Due date: Apr-23-2015 (In Class)
CHEN 323-500
Homework #9
1) (25 Points) Problem 11.2 ; Incropera, et al., 7/e
2) (25 Points) Problem 11.7; Incropera, et al., 7/e
3) (25 Points) Using LMTD method, solve the following problem:
1) (25 Points) Using LMTD met

Due date: Mar-05-2015 (In Class)
CHEN 323-500
Homework #5
1) (20 Points) Obtain an expression for T(x,y) for the geometry
shown below.
2) (20 Points) Obtain an expression for T(x,y) for the geometry
shown below.
3) (20 Points) Consider a thin wire which i

CHEN 323
Chemical Engineering Heat Transfer Operations
FINAL EXAMINATION
Name: _
Instruction:
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the question.
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When you sit in the room, have at

Introduction to Convection
Until now, convection effects have been treated as boundary
conditions for conduction calculations.
Convection heat transfer is energy transfer between a surface
and a fluid moving over the surface.
Our focus on convection wi

Objectives of Chapter 8 Internal Flow
Appreciation for the physical phenomena associated with
internal flow.
Obtain convection coefficients for flow conditions of practical
importance.
ChEn 323 Chapter 8 Slide 1
Hydrodynamic Considerations
For fully de

Heat Exchanger Design:
Part A
Determine the area required to achieve the desired temperature changes
T1
T2
Crossow Heat Exchangers
= ( , )
Determine the exit temperatures for a given area of Heat Exchanger

Selec%on of Heat Exchangers
Heat Transfer Rate
This is the most important quantity in the selection
of a heat exchanger.
A heat exchanger should be capable of transferring
heat at the specified rate in order to achieve the
desired temperature chang

Definition
Heat exchangers are devices in which heat is
exchanged between the two fluids at different
temperatures.
There are three broad types of heat exchangers:
Direct Transfer Type
Storage
Direct Contact Type
Applications
Heat exchangers are used

CHAPTER 1 Introduction 1
1.1 What and How? 2
1.2 Physical Origins and Rate Equations 3
1.3 Relationship to Thermodynamics 12
1.4 Units and Dimensions 36
1.5 Analysis of Heat Transfer Problems: Methodology 38
1.6 Relevance of Heat Transfer 41
1.7 Summary 4

Due date: May-05-2015
Only VNET submissions will be accepted.
CHEN 323-501
COMSOL PROJECT
Use COMSOL to obtain a solution for time-dependent heat transfer
occurring on the 2-D copper, gold, or silver name (letter) necklace
of your initials (e.g., Mustafa

CHEN 323
Chemical Engineering Heat Transfer Operations
FINAL EXAMINATION
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, have at

CHEN 323
Chemical Engineering Heat Transfer Operations
FINAL EXAMINATION
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, have at

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 2
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, hav

Due date: Mar-03-2016 (In Class)
CHEN 323-500
Homework #5
1) (20 Points) Obtain an expression for T(x,y) for the geometry
shown below.
2) (20 Points) Obtain an expression for T(x,y) for the geometry
shown below.
3) (20 Points) Consider a thin wire which i

CHEN 323
Chemical Engineering Heat Transfer Operations
MID-TERM EXAMINATION 2
Name: _
Instruction:
Write neatly: if I cannot read it, you're not going to get credit for
the question.
Only write on the front side of each page.
When you sit in the room, hav

Chapter 1 - Introduction
A synopsis of much of the rest of
the course.
This is a basic chapter and most
final relationships should be
known and understood well
enough that they come to mind
easily.
Chapter 1 - Introduction
Objectives of Chapter 1:
Be

Boundary conditions for the heat diffusion equation
at the surface (x=0)
1.
Surface temperature BC
T(0,t) = Ts
2.
Surface heat flux BC
T
a) Finite heat
k flux qs
x
x 0
b) AdiabaticT
or insulated surface
x
T
x
0
x 0
k surface
h condition
T T ( 0 ,t )
c)