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 20 of 28 for “"open-boundary"”.
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The Dielectric Tube Resonator-a Slow-Wave, Open Boundary, Dielectric Resonator for The Generation and Measurement of Millimeter and Submillimeter Wavelength Electromagnetic Radiation
Made available in DSpace on 2014-12-04T21:03:06Z (GMT). No. of bitstreams: 1 5902004.pdf: 11355962 bytes, checksum: 13141c1b532a2eb7b5eec65b12a1e0f6 (MD5) Previous issue date: 1959
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Stochastic modeling of flows behind a square cylinder with uncertain Reynolds numbers
… the numerical solution. The thesis uses a novel open boundary condition formulation for DO stochastic Navier-Stokes equations, which allows the modeling of a wide range of random inlet boundary conditions with a single DO simulation of low stochastic dimensions, reducing computational costs by …
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Salinity Transport in a Finite-Volume Sigma-Layer Three-Dimensional Model
… friction coefficients, wind stress and various boundary treatments. The results showed that the density-driven exchange of saltwater at the open boundary required a baroclinic boundary condition for salinity as well as a lateral filter at the boundary on each sigma layer. A new radiative …
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Towards first-principles electrochemistry
… charged slabs in vacuum subject to periodic boundary conditions. We show that the corrective potential (defined as the difference between the exact open-boundary potential and the periodic potential obtained from a Fourier transform) varies smoothly over space, allowing for its determination …
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Studies of South China Sea circulation and thermal structure using a three dimensional numerical model
… and observational oceanic inflow/outflow at the open boundaries. The seasonally averaged effects of isolated forcing terms are presented and analyzed from the following experiments: 1) non-linear effects removed, 2) wind effects removed, 3) open boundary inflow/outflow set to zero, and 4) open …
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Numerical Solutions of Nonlinear Free-Surface Wave Problems (Numerical Analysis, Filtering, Artificial Viscosity)
… on a fixed, small computational domain, using an open boundary condition.
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Implementing a Lattice Formulation of the Schwinger Modelwith Periodic Boundary Conditions Using Tensor Networks
… formulation of the Schwinger model with periodic boundary conditions. The primary challenge is to enforce the local constraints imposed by Gauss's Law. I do this by combining global conservation of a specially defined quantum number with the local optimization steps used in the density matrix …
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Non-equilibrium dynamics in three-dimensional magnetic spin models and molecular motor-inspired one-dimensional exclusion processes
… are multiples of the maximum step size, for both open and periodic boundary conditions, and verify this using a mean-field calculation. For open boundary conditions, we observe intriguing damped oscillator-like distribution of particles over the lattice with a periodicity equal to the maximum step …
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Modeling flow encountering abrupt topography using hybridizable discontinuous Galerkin projection methods
… Poisson equation with homogeneous Neumann boundary conditions everywhere along the boundary. Extensive numerical results using physically realistic ocean flows are presented to verify the HDG projection methods, including the formation of internal wave beams over a shallow but abrupt …
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Theoretical and Simulation Studies of a Driven Diffusive System
… study a system on a square lattice with periodic boundary conditions (PBC) along both principal lattice axes, while the drive acts along only one of these axes. For such systems, we analyze the full distribution of structure factors. Next, we investigate the effects of imposing other boundary …
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A Streamline Upwind/ Petrov-Galerkin FEM based time-accurate solution of 3D time-domain Maxwell's equations for dispersive materials
… are implemented to enable the solution of open boundary problems such as radiation patterns and radar cross sections. A unified perfectly matched layer absorbing boundary layer is implemented to efficiently terminate the computational region. Numerical simulations of these equations are …
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K-complexity and the Jordan-Wigner transformation
… time behaviour and symmetries. We find that for Open Boundary Conditions (OBC) the early time behaviour of the K-Complexity correlates with operator size, but that large operators can have very low K-Complexity if dual to a small operator. We find that for Periodic Boundary Conditions (PBC) …
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Finite Element Method Modeling Of Advanced Electronic Devices
… are examined by solving a full time-dependent, open-boundary Schrödinger equation. The non-quasi-static characteristics, such as the finite channel charging time, and the dependence of small signal transconductance and gate capacitance on the frequency, are explored. The validity of the …
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A Finite-Element Coarse-GridProjection Method for Incompressible Flows
… validated on standard test cases with realistic boundary conditions using unstructured triangular meshes. We also pioneer investigations of the effects of CGP on the accuracy of the pressure field. It is found that although CGP reduces the pressure field accuracy, it preserves the accuracy of the …
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A numerical study of the interaction of tidal flows in the Mersey estuary and Liverpool bay
… information to the river model across the common boundary of two models. After the joined model was set up and operated satisfactorily, the numerical experiments were carried out in Liverpool bay and the Mersey estuary to study the interaction of tidal flow in these two areas. The model was …
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Subduction in an eddy-resolving state estimate of the northeast Atlantic Ocean
… search for an initial eddy field and eddy-scale open boundary conditions by the use of an adjoint model. The adjoint model for this region of the ocean is stable and yields useful information despite concerns about the chaotic nature of eddy-resolving models. The method is successful because the …
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Inhomogeneous Totally Asymmetric Simple Exclusion Processes: Simulations, Theory and Application to Protein Synthesis
… asymmetric simple exclusion process (TASEP) with open boundaries. We incorporate the essential components of the translation process: Ribosomes, cognate tRNA concentrations, and mRNA templates correspond to particles (covering ell > 1 sites), hopping rates, and the underlying lattice, …
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Development of high-order doubly asymptotic open boundaries for wave propagation in unbounded domains by extending the scaled boundary finite element method
… the development of high-order doubly asymptotic open boundaries used for the numerical simulation of wave propagation problems in unbounded domains, including homogeneous semi-infinite layers with a constant depth, homogeneous full-planes with a circular cavity and semi-infinite layered systems. …
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Modeling macroalgae growth to optimize biomass.
… data assimilation was included to nudge the open boundary conditions to ensure stability when all boundaries were specified-pressure time series, which allowed this model to be forced by a regional-scale EFDC or ROMS model. Developments integrated with a domain decomposition-based MPI …
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Radiating instability of nonzonal ocean currents
… in the interior of the ocean away from the swift boundary currents. The energy radiation due to the temporal growth of non-trapped (radiating) disturbances in such a boundary current is thought to be one of the main sources for the described variability. The problem of stability of an energetic …
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