The best way to use this notebook is to open it in Mathematica and work through the examples and make changes in parameters or procedural steps to explore these problems. On line help is available in Mathematica 3 so that a definition and in most cases examples for any unknown command can be obtained. If you do not have a license for Mathematica, you can download MathReader (http://www.wolfram.com/mathreader/) free of charge. It does not let you change anything or run the calculations, but it does allow full access to the notebook.
Other notebooks that cover a range of fluid dynamics problems are available at:
http://www.nd.edu/~mjm/
These can also be used to explore multifluid flows and learn more about using Mathematica.