Conventions

1. Vector quantities are shown in bold ( u).

2. The task of integrating nomenclature from different fields has been a daunting one; not only is the terminology often not consistent, it is sometimes directly opposed. Our strategy has been, where possible, to keep to nomenclature in widespread use rather than inventing new symbols. This means that some symbols are used for two (or more!) quantities, for example h for the heat transfer coefficient and specific enthalpy, ? for momentum thickness, diffuser half-angle, and the circumferential coordinate, and W for work and for channel and diffuser width.

3. Several conventions have been used for station numbers. These are generally numerical: 0, 1, 2, 3, etc. Situations in which there is reference to inlet and exit conditions are denoted by i and e; these are noted where used. The subscripts i and o are used to denote inner and outer radii, and, again, the specific notation is defined where needed. The subscript E denotes the part of the stream which is outside ( external to ) the viscous layer (boundary layer) adjacent to a solid surface.

   Far upstream and far downstream stations are denoted by ? ? and ? respectively. In some cases two or more streams exist and these are denoted by 1, 2, etc. In situations in which there are two or more streams at different stations the convention used is that the first subscript denotes the stream and...