Glossary of Symbols and Notation

In reading the literature on the fluid mechanics of diffusion, one encounters numerous difficulties because of the diversity of reference frames and definitions used by authors in various fields. Frequently more time is spent in translating from one system of notation to another than is spent in the actual study of the physics of the problem. It is hoped that the glossaries of terminology and symbols given here will be of use to those whose fields of research require a familiarity with the literature on diffusion. This exposition should emphasize the extreme importance of giving lucid definitions in any discussion of diffusion and mass transfer. 

It is important to mention briefly the issues of notation and units. A glossary of frequently used symbols is given in Appendix A. Note that the definition of thermodynamic work used here is the work done on a system (e.g., dw = -p dV). As a result, the first law of thermodynamics has the form dE= dq + dw. Note also that E is used for the thermodynamic internal energy and U for the potential energy instead of the lUPAC choices of... 

There are a very large number of concepts, symbols and quite terse notations used in quantum chemistry. Most of the standard notation used throughout this work is collected here. All of this appendix should be duplicated somewhere in the text, this is merely a collection and, in some sense, a glossary. 

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