Analysis Of Turbulent Boundary Layers

Analysis of Turbulent Boundary Layers focuses on turbulent flows meeting the requirements for the boundary-layer or thin-shear-layer approximations. Its approach is devising relatively fundamental, and often subtle, empirical engineering correlations, which are then introduced into various forms of describing equations for final solution. After introducing the topic on turbulence, the book examines the conservation equations for compressible turbulent flows, boundary-layer equations, and general behavior of turbulent boundary layers. The latter chapters describe the CS method for calculating two-dimensional and axisymmetric laminar and turbulent boundary layers. This book will be useful to readers who have advanced knowledge in fluid mechanics, especially to engineers who study the important problems of design.

Modelling and Computation of Turbulent Flows has been written by one of the most prolific authors in the field of CFD. Professor of aerodynamics at SUPAERO and director of DMAE at ONERA, the author calls on both his academic and industrial experience when presenting this work. The field of CFD is strongly represented by the following corporate companies; Boeing; Airbus; Thales; United Technologies and General Electric, government bodies and academic institutions also have a strong interest in this exciting field. Each chapter has also been specifically constructed to constitute as an advanced textbook for PhD candidates working in the field of CFD, making this book essential reading for researchers, practitioners in industry and MSc and MEng students. * A broad overview of the development and application of Computational Fluid Dynamics (CFD), with real applications to industry * A Free CD-Rom which contains computer program’s suitable for solving non-linear equations which arise in modeling turbulent flows * Professor Cebeci has published over 200 technical papers and 14 books, a world authority in the field of CFD

Front Cover; Analysis of Turbulent Flows; Copyright Page; Contents; Chapter 1. Introduction; Chapter 2. Conservation Equations for Compressible Turbulent Flows; Chapter 3. Boundary-Layer Equations; Chapter 4. General Behavior of Turbulent Boundary Layers; Chapter 5. Algebraic Turbulence Models; Chapter 6.Transport-Equation Turbulence Models; Chapter 7. Short Cut Methods; Chapter 8. Differential Methods with Algebraic Turbulence Models; Chapter 9. Differential Methods with Transport-Equation Turbulence Models; Chapter 10. Companion Computer Programs; Subject Index.

This report describes the results of analytical, numerical, and experimental investigations of incompressible and compressible boundary layers. The subjects considered are (1) Laminar and/or turbulent numerical boundary-layer calculations in which the Reynolds stress is related to the turbulent kinetic energy; (2) an analytical investigation of turbulence near a wall which is not founded on classical mixing-length theory; (3) analytical solutions for relating velocity and temperature throughout turbulent boundary layers for nonunity Prandtl numbers; (4) a description of the data reduction of pitot pressure measurements utilizing these analytical results, and (5) the application of the numerical and analytical results to the analysis of turbulent boundary-layer measurements made in the Propulsion Wind Tunnel Facility (PWT).

Relevant to aerospace, mechanical, and civil engineers Boundary Layer Analysis, Second Edition spans the entire range of viscous fluid flows of engineering interest - from low-speed to hypersonic flows - introducing and analyzing laminar, transitional, and turbulent flows; the physics of turbulent shear flows; and turbulence models. It offers concurrent treatment of momentum, heat, and mass transfer, covering modern computational methods as well as analytical methods that are used widely in preliminary design, especially for design optimization studies. Boundary Layer Analysis, Second Edition features worked examples and homework problems employing user-friendly JAVA applets for boundary layer calculations including numerical methods. New to the second edition is a chapter introducing Navier-Stokes computational fluid dynamics.

An analysis of time-mean-turbulent boundary layer velocity profiles measured in a rapidly accelerating flow suggests that the outer region of the velocity profiles consists of essentially inviscid, rotational flow. The extent of this inviscid outer region was observed in some cases to exceed 90 percent of what is ordinarily thought of as the turbulent boundary layer thickness. On the other hand, the inner frictional region of these velocity profiles appears to have turbulent characteristics similar to those of more conventional turbulent boundary layers. Hence, the outer edge boundary condition for this inner region is more properly the external rotational flow region than the free stream.

This book presents a new method of asymptotic analysis of boundary-layer problems, the Successive Complementary Expansion Method (SCEM). The first part is devoted to a general presentation of the tools of asymptotic analysis. It gives the keys to understand a boundary-layer problem and explains the methods to construct an approximation. The second part is devoted to SCEM and its applications in fluid mechanics, including external and internal flows.