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 “"Lagrangian frame"”.
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Numerical modeling of strain localization in granular materials using Cosserat theory enhanced with microfabric properties
Finite element solution in the updated Lagrangian frame is used to investigate the strain localization phenomenon "shear bands" in granular materials. The micro-polar theory was used as the mathematical foundation for the continuum formulations. A laboratory testing results are used for …
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Probable maximum flooding using quantitative weather radar
… Storm efficiencies have been determined in a Lagrangian frame of reference for these events and used as input into a storm model to determine the corresponding PMP. Results show that while the peak rainfall rates are somewhat less with the storm model than suggested by the NERC FSR (current UK …
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Novel Bioinspired Pumping Models for Microscale Flow Transport
… particle tracking simulation approach in the Lagrangian frame of reference is also used to strengthen and support our pumping paradigm developed in this dissertation.
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A novel state-space based method for direct numerical simulation of particle-laden turbulent flows
… is stated purely in a deterministic Eulerian framework. The method is coupled to an incompressible three-dimensional Navier-Stokes solver. We focus on dilute suspensions where the volume fraction and mass loading of the particles in the flow are low enough so that the approximation of one-way …
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Vertical fluxes in the upper ocean
… below the mixed layer into two components in a Lagrangian frame: vertical velocity along sloping isopycnal surfaces and the adiabatic vertical velocity of isopycnal surfaces and demonstrate that vertical motion along isopycnal surfaces is particularly important at submesoscales (1-10 km). The …
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Vertical Fluxes in the Upper Ocean
… below the mixed layer into two components in a Lagrangian frame: vertical velocity along sloping isopycnal surfaces and the adiabatic vertical velocity of isopycnal surfaces and demonstrate that vertical motion along isopycnal surfaces is particularly important at submesoscales (1-10 km). The …
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Three-dimensional particle tracking velocimetry for turbulence applications
… a flow measure- ment technique that tracks the Lagrangian paths of a set of particles using photogrammetric principles. This technique allows to investigate complex fluid flows by measuring velocity and acceleration along particle trajectories. Implementing and optimizing the technique is, …
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Kinetic modelling of eletrospray systems using particle in cell method
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Lagrangian dynamics of turbulence: Applications with 3D particle tracking velocimetry
Lagrangian dynamics of turbulence allow for a distinct characterization of the motion of particles. It is particularly useful in the understanding of dispersion, mixing, and transport phenomena. Due to the complexity and difficulty in quantifying Lagrangian properties, experimental studies on …
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A Unified Theory Characterising the Spontaneous Condensation Tendency of Working Fluids in Organic Rankine Cycle Expansion: Key Difference from Steam and its Implications
… a two-dimensional time-marching mixed Eulerian-Lagrangian numerical scheme for solving inviscid two-phase condensing flows of various organic working fluids, following a similar strategy to previous mixed Eulerian-Lagrangian wet steam methods developed in the Cambridge University Engineering …
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Lagrangian observations and numerical modelling of hydrodynamics, turbulence, and sediment transport in a tidal river
… stretch of the tidally influenced river in a Lagrangian (flow-following) frame of reference by comparing predictions to a unique Lagrangian dataset which offers exceptional spatial resolution of quantities along the river. Specifically, I examine (1) the ability of the model to reproduce the …