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Laser-Strophometry: High-Resolution Techniques for Velocity Gradient Measurements in Fluid Flows: Lecture Notes in Physics Monographs, cartea 69

Autor Wilfried Staude
en Limba Engleză Hardback – 23 oct 2001
This book is the result of two decades of research work which started with an accidental observation. One of my students, Dipl. phys. Volkmar Lenz, - ticed that the speckle pattern of laser light scattered by a cuvette containing diluted milk performed a strange motion every time he came near the cuvette with his thumb. After thinkingabout this e?ect we came to the conclusion that this motion can only be caused by scatteringparticles with di?erent velocities, as in the case of the di?raction pattern of an optical grating: A linear motion of the grating does not change the pattern whereas a rotation of the grating does. The observed speckle motion could then be explained qualitatively as produced by the inhomogeneous velocity of the convection within the cuvette which was produced by the heat of the thumb. The theoretical treatment of this e?ect revealed that the velocity gradient of the light scattering medium is responsible for the speckle motion. The idea to use this e?ect for developingmeasurement techniques for velocity gradients arose almost immediately. For that purpose we had to develop not only experimental set-ups to measure the pattern velocity but also the theory which describes the connection between this velocity and the velocity gradient. The result of this work together with the description of a method developed by another group forms the contents of this book. I am indebted to the students who worked in my laboratory and developed the measurement techniques. These were, in temporal order, Dr.
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Specificații

ISBN-13: 9783540426226
ISBN-10: 3540426221
Pagini: 200
Ilustrații: XV, 180 p. 2 illus.
Dimensiuni: 155 x 235 x 17 mm
Greutate: 0.46 kg
Ediția:2001
Editura: Springer Berlin, Heidelberg
Colecția Springer
Seria Lecture Notes in Physics Monographs

Locul publicării:Berlin, Heidelberg, Germany

Public țintă

Research

Cuprins

A Short Review of Velocity Gradient Measurement Techniques.- Mathematical Background.- Physical Basis: Theoretical Part.- Physical Basis: Experimental Part.- FRS: Forced Rayleigh Scattering.- LICC: Light Intensity Cross-Correlation.- DPSS: Double Pulse Speckle Strophometry.- DSS: Differential Speckle-Strophometry.- Measurement of Velocity Gradient Correlations.- Outlook.

Recenzii

From the reviews of the first edition:
"This book describes techniques that allow the measurement of arbitrary velocity gradient components in fluids with high spatial and temporal resolution, e.g. turbulent fluids. The techniques are based on the properties of scattered laser light. The book gives a detailed and rigorous treatment of the physical and mathematical background in a pedagogical presentation accessible to students in physics and engineering. From both the theoretical and experimental points of view, four different schemes are discussed in detail … ." (ETDE – Energy Database, February, 2002)

Textul de pe ultima copertă

This book describes techniques that allow the measurement of arbitrary velocity gradient components in fluids with high spatial and temporal resolution, e.g. turbulent fluids. The techniques are based on the properties of scattered laser light. The book gives a detailed and rigorous treatment of the physical and mathematical background in a pedagogical presentation accessible to students in physics and engineering. From both the theoretical and experimental points of view, four different schemes are discussed in detail; the schemes differ in the way the velocity of the moving pattern of the scattered laser light is measured.

Caracteristici

This is a comprehensive presentation of new measurement techniques in fluids with high spatial and temporal resolution Includes supplementary material: sn.pub/extras