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 11 of 11 for “"canonical flows"”.
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Wall-modeled Large-eddy Simulation Based on Building-block Flows
… The core assumption of the model is that simple canonical flows contain the essential physics to provide accurate predictions of the SGS tensor in more complex flows. The model is constructed to predict zero-pressure-gradient wall-bounded turbulence, adverse/ favorable pressure gradient effects, …
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Predicting Motion of Engine-Ingested Particles Using Deep Neural Networks
… of aviation gas turbine engines. Complex flows, such as flow through a particle separator, naturally have rotation and strain present throughout the flow field. This study attempts to understand if the motion of particles within rotational and strained canonical flows can be accurately …
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Modeling of laminar-to-turbulent transition using a hybrid multi-scale simulation strategy
… by simulating temporal transition within two canonical flows: the Taylor-Green Vortex and plane Poiseuille flow. The assessment is performed by comparing the results against corresponding DNS.
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Parallel Simulations, Reduced-Order Modeling, and Feedback Control of Vortex Shedding using Fluidic Actuators
… understanding of the flow physics. Analyzing canonical flows, such as the flow past a cylinder, provides fundamental concepts governing the fluid behavior. Despite a simpler geometry, studying such flows are a building block in an effort to comprehend, model, and control complicated flows. For …
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Predictive Turbulence Modeling with Bayesian Inference and Physics-Informed Machine Learning
… design and analysis involving turbulent flows. In RANS simulations, the Reynolds stress needs closure models and the existing models have large model-form uncertainties. Therefore, the RANS simulations are known to be unreliable in many flows of engineering relevance, including flows with …
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Variations on bayesian optimization applied to numerical flow simulations
… characterized in typical applications involving canonical flows. In this work, the efficiency of classical BO and alternative derivative-free methods is compared on a simplified flow case, i.e. drag reduction in the two-dimensional flow around a cylinder. The application of BO to complex flows is …
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Experiments on turbulent flows in rough pipes: spectral scaling laws and the spectral link
… laws for the turbulent energy spectra of pipe flows. These new scaling laws— an inner scaling law and an outer scaling law—differ from the scaling laws that were predicated on Townsend’s attached–eddy hypothesis in that they are proper analogues (or spectral counterparts) of the classical …
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Detached Eddy Simulation of Turbulent Flow and Heat Transfer in Turbine Blade Internal Cooling Ducts
… feasible solutions of high Reynolds number flows undergoing massive separation with reliable accuracy. Since its inception, DES has been applied to a wide variety of flow fields, but mostly limited to unbounded external aerodynamic flows. This is the first study to apply and validate DES to …
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Investigating the Interaction of a Supersonic Single Expansion Ramp Nozzle and Sonic Wall Jet
… By decomposing this complex flow field into two canonical flows, a supersonic rectangular nozzle and a sonic wall jet, a fundamental approach is taken to observe how these two jets interact. </p> <p>Thorough investigations of the highly turbulent flow field are being performed. Current analytical …
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Modern Methods in Machine Learning as Applied to the Study of a Complex Supersonic Jet Flow
… 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 fundamental experiments, data fusion, and …
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Nonlinear dynamics of complex fluids in fragmentation and fracture
… mechanical response of complex fluids in such flows. Two distinct classes of model fluids/gels are studied in this thesis. First, a series of model viscoelastic solutions composed of a flexible homopolymer, poly(ethylene oxide) or PEO, dissolved in a water/glycerol mixture. These dilute …