end of Chapter 11 (geophysical aspects). Once again we decided that, except for a brief mention, convection in unsaturated media had to be beyond the scope of this book. D.A.N.againenjoyedthehospitalityoftheDepartmentofMechanicalEngine- ing and Materials Science at Duke University while on Research and Study Leave from the University of Auckland, and both of those institutions again provided ?nancial support. We are grateful for comments from Graham Weir and Roger Young on a draft of Section 11.9, a topic on which we had much to learn. We also are grateful to a large number of people who provided us with preprints of their papers prior to publication. Other colleagues have improved our understanding of the subject of this book in ways too numerous to mention here. Once again we relied on the expertise and hard work of Linda Hayes for the preparation of the electronic version of our manuscript, and again the staff at the Engineering Library of Duke University made our search of the literature an enjoyable experience.
From the reviews of the fourth edition:
"The book by Nield and Bejan provides a fundamental and comprehensive presentation of mathematical and physical theories of many classical and new (modern) areas of flow and transport in porous media ... . The book is excellently written and easily readable. ... extremely useful to a wide range of specialists working in the area of flow in porous media, such as university students, graduate students, design engineers, physicists, chemical engineers, and also to researchers interested in the mathematical theory of flow in porous media." (Ioan Pop, zbMATH, Vol. 1268, 2013)
"The book by Nield and Bejan provides a fundamental and comprehensive presentation of mathematical and physical theories of many classical and new (modern) areas of flow and transport in porous media ... . The book is excellently written and easily readable. ... extremely useful to a wide range of specialists working in the area of flow in porous media, such as university students, graduate students, design engineers, physicists, chemical engineers, and also to researchers interested in the mathematical theory of flow in porous media." (Ioan Pop, zbMATH, Vol. 1268, 2013)