文档介绍：HEAT CONDUCTION
IN TWO AND THREE DIMENSIONS
Computer Modelling of
Building Physics Applications
Thomas Blomberg
May 1996
Report TVBH-1008
ISRN LUTVDG/TVBH- -96/1008- -SE/(1-188)
ISBN 91-88722-05-8
DepartmentofBuildingPhysics
Lund University, Sweden
The Cover
The front cover ¯gure shows the surface temperatures for a corner, see
Section . The temperatures are calculated by HEAT3 and displayed
using MATLAB. The calculation took less than a minute on a PC.
The back cover ¯gures show the input, the numerical mesh, and the
calculated temperatures for a window frame with 20 cavities. The tem-
peratures are calculated by HEAT2 and displayed using MATLAB. Ra-
diation inside the cavities is taken into account. This calculation took a
few minutes on a PC.
Natural laws have no pity
Robert A. Heinlein ("Time enough for love")
Preface
This work has been made within the research tradition of the Lund Group -
putational Building Physics. The mathematical part of Chapter 7 concerning radiation
coupled to heat conduction has been formulated by my supervisor Docent Johan Claesson.
I wish to express my sincere appreciation to Johan Claesson who has been involved in
a great part of the presented work. His e®orts were a constant source of encouragement.
I am also grateful to Prof. Carl-Eric Hagentoft, Prof. Arne Elmroth, and Docent GÄoran
HellstrÄom for various suggestions, comments, and contributions. I have the pleasure to
thank Lilian Johansson for skillfully preparing the illustrations.
The ¯nancial support provided by the Swedish Council for Building Research is grate-
fully acknowledged. I am also grateful to the Axelsson-Johnson-foundation, being the
main sponsor to my research visit in Italy in 1992. I would also like to extend my grati-
tude to the Valle-foundation for the one-year scholarship at the University of Washington
in Seattle in 1988-1989.
To Sanja and Julia, I owe a debt of gratitude for all the hours stolen from them. It