Calculate, using the numerical finite difference procedure for one dimensional conduction, the steady state temperature in a long flat plate of 1m thickness (and also 1m width) with a uniform energy generation of 4 x 104W/m3 The surface at x = 0 is a
UC Berkeley Department of Mechanical Engineering
ME 109 Heat Transfer (CCN 55509)
Spring 2016
Wednesday January 20th to Friday May 6th, 2016
Instructor:
Dr. David Rich
(davidrich@berkeley.edu, rich@reaxengineering.com)
Office: 60 A Hesse Hall
Office Hours
ME#109#HWK#1#Solutions#
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PROBLEM 2.6
KNOWN: Rod consisting of two materials with same lengths. Ratio of thermal conductivities.
FIND: Sketch temperature and heat flux distributions.
SCHEMATIC:
T1
T2
T1 < T
ME 109 HWK #1
Due 1/30/15
Problem 1
A truncated cone 30 cm high is made of aluminum [k=204 W/mK]. The diameter at
the top is 7.5 cm and the diameter at the bottom is 12.5 cm. The lower surface
Homework Assignment #1
ME 109 Heat Transfer
University of California, Berkeley
Fall 2016
Assigned:
August 31, 2016
Due:
Wednesday, September 7, by 10:00 am,
Turn in to the ME109 homework box (box #4) on the 3rd floor of Etcheverry Hall.
Topics
Thermal Res
Homework Assignment #3
ME 109 Heat Transfer
University of California, Berkeley
Fall 2016
Assigned:
September 14, 2016
Due:
Wednesday, September 21, by 4:00 pm,
Turn in to the ME109 homework box (box #4) on the 3rd floor of Etcheverry Hall.
Topics
Critical
Homework Assignment #2
ME 109 Heat Transfer
University of California, Berkeley
Fall 2016
Assigned:
September 7, 2016
Due:
Wednesday, September 14, by 4:00 pm,
Turn in to the ME109 homework box (box #4) on the 3rd floor of Etcheverry Hall.
Topics
Thermal R
ME109 Heat Transfer
Midterm 1- Fall04
Instructor: Prof. A. Majumdar
Oct. 19, 2004; 5:10 pm - 6:30 pm; Maximum Points = 30
NOTE: This is an open book, open notes exam.
1. C onsider a v ery t hin p lanar h eater
surrounded by materials on both sides, as
sho
ME109 Heat Transfer
Midterm 2- Fall04
Instructor: Prof. A. Majumdar
Nov 23, 2004; 5:10 pm - 6:30 pm; Maximum Points = 30
NOTE: This is an open book, open notes exam.
1. To keep the passengers warm in a car, the waste heat from a car exhaust is utilized
th
ME 109 Heat Transfer HW Chapters 6 and 7: Assigned Monday 3/7/16, Due Friday 3/18/16
Problem 1:
Appendix E of your text provides the following energy equation:
Chapter 6, Equation 6.29 presents a reduced form of equation E.4 as follows:
a) Walk through th
ME 109, HEAT TRANSFER (3)
Spring 2015
MWF 2-3 105 North Gate
Costas P. Grigoropoulos, Professor
Text: Fundamentals of Heat and Mass Transfer
6177 Etcheverry Hall
Incropera and De Witt, 7th
ME109 Heat Transfer
Final Exam; Instructor: Prof. A. Majumdar
December 18, 2004; Time: 12:30-3:30 pm; Maximum Points = 100
NOTE: This is an open book, open notes exam.
Transmissivity, tl
Reflectivity, rl
1. Give brief answers with explanation and reasonin
ME109 Heat Transfer
Midterm 1- Fall01
Instructor: Prof. A. Majumdar
Oct. 12, 2001; 10:10 am - 11:00 am; Maximum Points = 30
NOTE: This is an open book, open notes exam.
1. For solving a 2-D transient heat conduction problem, a node, To, is placed on the b
PROBLEM 13.60
KNOWN: End of propellant tank with radiation shield is subjected to solar irradiation in space
environment.
)
(
FIND: (a) Temperature of the shield, Ts, and (b) Heat flux to the tank, q1 W / m 2 .
SCHEMATIC:
ASSUMPTIONS: (1) All surfaces are
Note: This problem could also be solved by realizing that the radiation from a sphere varies like
1/r^2 where r is the distance from the center of the sphere. In this case, the flux at a distance of
r_sun = 6.96e8 m must increase from the value at d = 1.5