دانلود کتاب Laser Velocimetry in Fluid Mechanics

In fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes.Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map.This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements. Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.Content: Chapter 1 Measurement Needs in Fluid Mechanics (pages 1–13): Daniel Arnal and Pierre MillanChapter 2 Classification of Laser Velocimetry Techniques (pages 15–31): Alain BoutierChapter 3 Laser Doppler Velocimetry (pages 33–138): Alain Boutier and Jean?Michel MostChapter 4 Optical Barrier Velocimetry (pages 139–147): Alain BoutierChapter 5 Doppler Global Velocimetry (pages 149–157): Alain BoutierChapter 6 Particle Image Velocimetry (pages 159–281): Michel Riethmuller, Laurent David and Bertrand LecordierChapter 7 Seeding in Laser Velocimetry (pages 283–303): Alain Boutier and Max ElenaChapter 8 Post?Processing of LDV Data (pages 305–387): Jacques Haertig and Alain BoutierChapter 9 Comparison of Different Techniques (pages 389–397): Alain Boutier