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Gas Dynamics by Ethirajan Rathakrishnan: A Review
Gas Dynamics by Ethirajan Rathakrishnan is a book that covers the fundamental concepts and applications of gas dynamic processes. The book is suitable for students and professionals in aerospace engineering, mechanical engineering, chemical engineering and applied physics. The book provides a clear and concise explanation of the basic equations of compressible flow, wave propagation, steady and unsteady one-dimensional flow, normal and oblique shock waves, expansion waves, potential flow, rarefied gas dynamics and high-temperature gas dynamics. The book also includes numerous worked-out examples, illustrations and exercises to enhance the understanding of the topics.
The book is divided into 12 chapters, each covering a specific aspect of gas dynamics. The first chapter introduces some preliminary thoughts on gas dynamics and its importance in various fields. The second chapter derives the basic equations of compressible flow from the conservation laws of mass, momentum and energy. The third chapter discusses the concept of wave propagation and the characteristics of different types of waves. The fourth chapter analyzes the steady one-dimensional flow of a perfect gas with varying area, friction, heat transfer and mass addition. The fifth chapter deals with the normal shock waves that occur when a supersonic flow encounters a sudden change in area. The sixth chapter extends the analysis to oblique shock waves and expansion waves that occur when a supersonic flow encounters a wedge or a corner. The seventh chapter introduces the potential equation for compressible flow and its applications to two-dimensional supersonic flows. The eighth chapter covers the similarity rule and its use in solving problems involving geometrically similar flows. The ninth chapter presents the method of characteristics for solving two-dimensional supersonic flows with complex boundaries. The tenth chapter introduces the concept of rarefied gas dynamics and its applications to low-density flows. The eleventh chapter discusses the effects of high temperature on gas properties and gas dynamic processes. The twelfth chapter summarizes the main points of the book and provides some suggestions for further reading.
The book is well-written and easy to follow. The author has used a logical and systematic approach to explain the fundamental aspects of gas dynamics. The book is also rich in examples and exercises that help the reader to apply the concepts to practical problems. The book is suitable for both undergraduate and postgraduate courses on gas dynamics or compressible flows. It is also a useful reference for scientists and engineers working in the field of gas dynamics in industries and research laboratories.One of the strengths of the book is its emphasis on the physical understanding of gas dynamic phenomena. The author explains the underlying principles and assumptions behind the mathematical formulations and provides physical interpretations of the results. The book also covers some topics that are not commonly found in other books on gas dynamics, such as the power of compressible Bernoulli equation, the method of characteristics for nozzle design, and the effects of high temperature on gas properties. The book also includes a chapter on measurements in compressible flows and optical flow visualization techniques, which are useful for experimental studies.
Another strength of the book is its pedagogical approach. The author has organized the book in a logical and coherent manner, starting from the basic concepts and gradually moving to more advanced topics. The author has also provided numerous examples and exercises throughout the book to illustrate the applications and test the understanding of the concepts. The examples are well-chosen and relevant to real-world problems. The exercises are challenging and cover a wide range of topics and difficulty levels. The book also provides a solutions manual for instructors containing the complete worked-out solutions to chapter-end problems.
The book is not without its limitations, however. One limitation is that the book does not cover some topics that are important for modern gas dynamics research, such as hypersonic flows, shock wave boundary layer interactions, detonation waves, and computational fluid dynamics. The book also does not provide any software or code for solving gas dynamic problems numerically. Another limitation is that some of the derivations and explanations in the book are too brief or unclear, and may require further clarification or reference to other sources. Some of the figures and tables in the book are also poorly labeled or formatted, and may cause confusion or misunderstanding.
Overall, Gas Dynamics by Ethirajan Rathakrishnan is a comprehensive and accessible book that covers the essential topics and issues associated with gas dynamic processes. The book is suitable for students and professionals who want to learn the fundamentals and applications of gas dynamics. The book is well-written and easy to follow, with a strong emphasis on the physical understanding and problem-solving skills. The book also provides numerous examples and exercises to enhance the learning experience. The book has some limitations, such as not covering some advanced topics and having some unclear or poorly formatted content, but these do not detract from its overall quality and usefulness. ec8f644aee