PREFACE_1970_The-Dynamics-of-Aerocolloidal-Systems

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P R E F A C E 
DESPITE an ever widening technological interest in aerocolloidal systems, the fundamental 
science of aerosols, on which practical considerations must rely, largely has been set aside 
until recently in deference to other problems. However, in the last decade, a kind of 
renaissance in aerosol research has taken place in which much of the classical work of the 
early twentieth century is being extended. New sophisticated theoretical and experimental 
techniques are being developed, and are being applied to better understand the behavior 
of aerosol systems. 
As scientists in many diverse fields expand their activity in aerosol research, the results 
of investigations appear in a wide variety of journals that reach entirely different small 
groups of workers. The problems of communication of these scientific results are compli-
cated further by the worldwide character of aerosol science. To help focus attention on 
the variety of important aerosol research presently being published, and to open a new 
channel for international communication between workers in this field, we have organized 
a new series entitled, The International Reviews in Aerosol Physics and Chemistry. This 
work will consist of a collection of monographs of book length, and companion volumes 
of selected review articles dealing with several aspects of aerosol science, and its relation-
ship to the study of the so-called "particulate state of mat ter ." The scope of the Inter-
national Reviews will be limited to results which contribute significantly to the state of 
fundamental knowledge of aerosol behavior. 
Because The International Reviews in Aerosol Physics and Chemistry is designed to 
concentrate on the fundamental aspects of aerosol science, it should have considerable 
usefulness to both practicing scientists and to graduate students in such widely diverse 
fields as physics, physical chemistry, meteorology, geophysics, astronomy, chemical 
engineering, mechanical engineering, aerospace engineering, and medicine. 
We have chosen to introduce the International Reviews by publishing a monograph on 
the mechanics of aerocolloidal systems. This first volume contains a brief outline of 
various aspects of aerosol dynamics including topics ranging from transport processes to 
single particles to the generation and behavior of collections of particles, clouds. In this 
book, emphasis is placed on a truly distinguishing feature of particulate mat ter in the 
aerosol class. That is, the dynamics of particles in an environment requires consideration 
of fluid dynamics from the continuum regime to the free molecule regime. 
Though some of the theory discussed here involves classical hydrodynamics, the bulk 
of the topics presented stem from rather recent studies being published at an alarming 
rate in the last twenty five years. 
We anticipate that this book will be useful not only to the scholars but to scientists more 
concerned with practical aspects of aerosols. It is hoped that this volume also will be helpful 
to those who would consider teaching aerosol mechanics as part of a curriculum in the 
atmospheric sciences, or in other applied sciences including applied physical chemistry, 
and engineering. 
ix 
χ P R E F A C E 
It is a pleasure to acknowledge the support during the writing of this book of the 
National Science Foundat ion through its contract with the National Center for Atmo-
spheric Research, and of the Public Health Service through its grant N o . AP00479-01 to 
J. R. Brock. Thanks go to the many people who helped us with preparat ion and review of 
this manuscript. We are also grateful to those who kindly made the figures, plates and 
other data available to us for illustrating the many facets of aerosol dynamics. 
G .M.H. 
J .R.B.