This textbook aims to facilitate access to technical fluid mechanics and the design of fluid machines based on fundamental physical knowledge. The book is intended for undergraduate engineering students at technical universities, colleges, and vocational academies, as well as for master's students, and also for engineers and technicians in practice who wish to familiarize themselves with the issues of fluid flow. Starting from basic concepts that are largely familiar from physics education, the complex relationships for flowing fluids are gradually developed and made comprehensible through numerous calculation examples. Many exercises aid in understanding these relationships. Special emphasis has been placed on clear technical presentation and illustrations, which have been revised for the second edition.