Transport Phenomena II
CHBE 351
Dr. Trajano
Heat transfer
Heat is a form of energy and heat transfer is thermal energy in transit
Thermodynamics is about
Interaction of energy with matter
Conversion o
Problem 9.2 Textbook Unsolved
Problem 9.3 Textbook Unsolved
Problem 9.17 Textbook Unsolved
Consider a vertical plate of dimension 0.25 m x 0.50 m that is
at Ts=100oC in a quiescent environment at T=20
Example Problem 6.1  Textbook
16
17
Example 6.2  Textbook
18
19
Example 6.3  Textbook
20
21
Problem 6.59 Textbook Unsolved
An object of irregular shape 1 m long at Ts=100oC is suspended in an airst
Transport Phenomena II
(Heat and Mass Transfer)
Concentric Tube Annulus
Review Problems on Internal Flows
The Concentric Tube Annulus
Fluid passes through the annulus and convection heat transfer may
Transport Phenomena II
(Heat and Mass Transfer)
Laminar Flow Correlations
Turbulent Flow Correlations
Laminar Flow Correlations
For fullydeveloped laminar flow in a circularsection pipe, partial
di
Transport Phenomena II
(Heat and Mass Transfer)
Energy Balance in Pipe Flow
Constant Heat Flux at the Wall
Constant Surface Temperature
Energy Balance in Pipe Flow
Heat transfer for full length of pip
Transport Phenomena II
(Heat and Mass Transfer)
Internal Flow
Velocity Profile in Internal Flow
Temperature Profile in Internal Flow
External and Internal Flow
External Flow
Boundary layer grows
with
Transport Phenomena II
(Heat and Mass Transfer)
Heat/Mass Transfer Analogy
Evaporative Cooling
The Reynolds Analogy
Heat/Mass Transfer Analogy
T*(x*,y*=0)=0
T*(x*, y*)=1
C*(x*,y*=0)=0
C*(x*, y*)=1
No
Transport Phenomena II
(Heat and Mass Transfer)
Boundary Layer Analysis
Fundamental Transport Equations
Dimensionless Numbers
Functional Relations
Boundary Layer Analysis
Apply conservation laws to di
Transport Phenomena II
(Heat and Mass Transfer)
Introduction to Convection
Modes of Heat Transfer
Heat transfer is the thermal energy in transit
due to a temperature difference
3 modes of heat trans
Transport Phenomena II
(Heat and Mass Transfer)
Conservation of Energy
First Law of Thermodynamics
The Surface Energy Balance
First Law of Thermodynamics
Over a time interval:
The increase in the am
Transport Phenomena II
(Heat and Mass Transfer)
External Flow
Flow over a Flat Plate
External Flow
Evaluate convection heat transfer problems by
assessing the system geometry and flow conditions and
Engineering Thermodynamics
CHBE 346
Phase diagrams of Nonideal Systems
Concepts for Generalized Phase Equilibria

Explain nonidealities
Explain deviations from Raoults law
Nonideal Systems
Positive d
Heat and Mass Transfer
CHBE 351
Tutorial 05
Problem 1 (Problem 6.83  Textbook Unsolved)
A disk of 20mm diameter is covered with a water film. Under steadystate
conditions, a heater power of 200 mW