This book has been written for the introductory course of fluid mechanics for students at the undergraduate and postgraduate levels. It provides the fundamental knowledge allowing students in engineering and natural sciences to enter fluid mechanics and its applications in various fields where fluid flows need to be dealt with. Volume 2 of this book contains ten chapters to help build the basic understanding of the subject matter. It adequately addresses the more complex and advanced issues on fluid mechanics in simplest of manners. The book covers laminar flow (viscous flow), turbulent flow, boundary layer theory, flow through pipe, pipe flow measurement, orifices and mouthpieces, flow past submerged bodies, flow through open channels, notches and weirs, and compressible flows. The concepts are supported by numerous solved examples and multiple-choice questions to aid self-learning in students. The book also contains illustrated diagrams for better understanding of the concepts. The book is extremely useful for the undergraduate and postgraduate students of engineering and natural sciences.