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Charles Vest (1979)
Holographic Interferometry
U. Köpf (1972)
Application of speckling for measuring the deflection of laser light by phase objectsOptics Communications, 5
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Study of laminar thermal boundary layers occurring around the leading edge of a vertical isothermal wall using a specklegram techniqueExperiments in Fluids, 13
N. Fomin, E. Lavinskaja, W. Merzkirch, D. Vitkin (1999)
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Wave Propagation in a Turbulent Medium
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Study of thermal flows from two-dimensional, upward-facing isothermal surfaces using a laser speckle photography techniqueExperiments in Fluids, 17
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Particle Image Velocimetry
Zengyuan Guo, Yao-zu Song, Zhixin Li (1995)
Laser speckle photography in heat transfer studiesExperimental Thermal and Fluid Science, 10
The speckle tomography technique is used for reconstructing both large-scale structures in turbulent flows and the microstructure of turbulence. The technique is based on multi-projectional line-of-sight speckle photography measurements with a subsequent computer-assisted tomographic reconstruction of the interior structure of the flowfield. The large-scale structure is reconstructed using the Radon integral equation, and the microstructure is analysed using a statistical approach and a novel Erbeck–Merzkirch integral transform. Digital speckle photography and speckle tomography methods are described. Numerical simulation of the optical technique is performed using digital ray tracing through a turbulent flowfield. The methods are illustrated by the 3D "averaged" temperature fields in turbulent convective flows obtained earlier and by the recent reconstruction of 3D correlation functions of density variations in turbulent flows. Local values of turbulence (Kolmogorov) microscale are evaluated using these correlation functions and the Erbeck–Merzkirch integral transform The precision of the reconstruction and the spatial resolution achieved are analysed.
Experiments in Fluids – Springer Journals
Published: Jul 18, 2002
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