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 9 of 9 for “"Linear Stochastic estimation"”.
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Empirical mode decomposition applied to planar and volumetric velocity field measurements of a supersonic separated flow
… in both the shear layer and the trailing wake. Linear stochastic estimation of these three-dimensional results revealed the presence of conventional hairpin and counter-hairpin vortices within the shear layer.
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Dynamic Estimation of Large-Scale Flow Events in Open Cavity Flows
… a combination of two data-driven techniques, Linear Stochastic Estimation (LSE) and Dynamic Mode Decomposition (DMD), in an innovative approach called sensor-based conditional DMD (conDMD). The sensor-based conDMD approach applies DMD directly to pressure measurements, contrary to traditional …
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Stochastic estimation of near-wall closure in turbulence models
Linear stochastic estimation (LSE), a best mean square estimator, is used to formulate boundary closure models for the numerical large eddy simulation (LES) of turbulence. The stochastic estimation method resolves coherent structure of the wall layer using empirical correlation functions, and …
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Complex Equilibrium of Laterally Curved Wakes
… in the turbulent structure of both wakes. Linear stochastic estimation reveals the presence of spanwise and double-roller eddy structures in the plane wake and only spanwise eddies were detected for the ring wake.
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APPLICATION OF DATA FUSION TO FLUID DYNAMIC DATA
… such as proper orthogonal decomposition (POD), linear stochastic estimation (LSE), and wavelet analysis. This process can generate large quantities of data and a method of handling all of the data and the techniques in an efficient manner is required. To accomplish this, a framework was …
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Contributions to the Understanding of Turbulent Boundary Layers Over Curved Walls
… scales relied on two-point statistical methods. Linear stochastic estimation showed that hairpin vortex packets had a significant role, irrespective of the pressure gradient and wall curvature. Consequently, the correlation contours based on the wall-tangent velocity were forward leaning. The …
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Three-dimensional turbulence mechanisms in a supersonic separated/reattaching longitudinal cylinder wake
… novel turbulence analysis techniques, such as linear stochastic estimation (LSE), proper orthogonal decomposition (POD), and several others. The volumetric TPIV data allowed for the identification and characterization of 3-D coherent turbulent structures within this flow, including upright …
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Unsteady Turbulence Interaction in a Tip Leakage Flow Downstream of a Simulated Axial Compressor Rotor
… has been studied. The Virginia Tech low speed linear cascade wind tunnel was adapted to model the unsteady tip leakage flow produced by a rotor operating in the vortical wakes of a set of stator vanes. The cascade, consisting of 8 GE rotor B blades, has adjustable tip gap, inlet angle of 65.1 …
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Modern Methods in Machine Learning as Applied to the Study of a Complex Supersonic Jet Flow
… over the past 80 years; however, the complex non-linear interactions between multiple merging canonical flows are not well understood. In this study, we seek to gain a better understanding of the flow physics in the near-field of a particular complex supersonic jet flow by using a combination of …