Preface
The fourth edition of this textbook sees some additions and deletions but no philosophical
change. The basic outline of eleven chapters and five appendices remains the
same. The triad of integral, differential, and experimental approaches is retained and
is approached in that order of presentation. The book is intended for an undergraduate
course in fluid mechanics, and there is plenty of material for a full year of instruction.
The author covers the first six chapters and part of Chapter 7 in the introductory semester.
The more specialized and applied topics from Chapters 7 to 11 are then covered
at our university in a second semester. The informal, student-oriented style is retained
and, if it succeeds, has the flavor of an interactive lecture by the author.
Approximately 30 percent of the problem exercises, and some fully worked examples,
have been changed or are new. The total number of problem exercises has increased
to more than 1500 in this fourth edition. The focus of the new problems is on practical
and realistic fluids engineering experiences. Problems are grouped according to
topic, and some are labeled either with an asterisk (especially challenging) or a computer-
disk icon (where computer solution is recommended). A number of new photographs
and figures have been added, especially to illustrate new design applications
and new instruments.

Hacene@freebooks
thanx
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