Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"outer scale"”.
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Stellar interferometry - detectors and the atmosphere.
… is sensitive to a very wide range of scales in the seeing - both temporal and spatial. The well-established theoretical models of seeing are currently not well constrained experimentally, especially in relation to the outer scale of turbulence. The size of this latter parameter is the …
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Propagation of Gaussian Beams Through a Modified von Karman Phase Screen
… statistics, utilizing the Fried parameter, inner scale and the outer scale. The scintillation index is analyzed as a function of the structure constant, phase screen location, the initial width of the Gaussian beam, etc. Similarly, the numerical simulations are extended using a pair of …
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Effects Of Large-Scale Free Stream Turbulence On A Turbulent Boundary Layer
… the ratio of the free stream turbulence length scale to the boundary layer depth is greater than unity. Hot wire measurements show that, at high turbulence intensities, the effects of the free stream turbulence extend deep into the boundary layer, affecting the wall stress as well as the …
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Fade Statistics For A Lasercom System And The Joint Pdf Of A Gamma-gamma Distributed Irradiance And Its Time Derivative
… to infer the structure constant, Cn2, the inner scale and the outer scale from the optical measurements. The inferred parameters were used in calculations for the theoretical PDFs. It was found that fade predictions made by the gamma-gamma and lognormal distributions provide an upper and lower …
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Effects of surface roughness on the flow characteristics in a turbulent boundary layer
… was also found that the application of a “mixed outer scale” caused the velocity profile in the outer region to collapse onto the same curve, irrespective of Reynolds numbers and roughness conditions. The present results showed that there is a common region within the overlap region of the mean …
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Measuring Optical Turbulence Parameters With A Three-aperture Receiver
… along with a method to estimate the inner scale developed by Hill. The theory and minimization algorithm used to infer the atmospheric parameters are discussed. The main focus is on the analysis and collection of experimental data with a three-aperture receiver system. Intensity …