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 33 for “"numerical solver"”.
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A parallel numerical solver using hierarchically tiled arrays
… is one well-known example of a parallel solver for linear systems. The Hierarchically Tiled Array data type extends traditional data-parallel array operations with explicit tiling and allows programmers to directly manipulate tiles. The tiles of the HTA data type map naturally to the …
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Development of a Numerical Solver for Phase-Change and Two-Phase Flow in Porous Media
… of those systems. In this work, we develop a CFD solver using the object-oriented OpenFOAM architecture that can simulate most of the relevant physics of flow and phase-change in porous media. The developed solver is based on an existing solver based on the IMPES (Implicit Pressure, Explicit …
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Development of an electromagnetic numerical solver based on the finite difference time domain (FDTD) technique for research and teaching purposes
… integration of 1D-FDTD scheme into the 3D-FDTD solver is realized through the implementation of Total Field Scattered Field (TFSF) technique. The technique is used to excite plane wave into the 3D-FDTD domain and will be used for future wave propagation studies. All simulation results presented …
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Adjoint sensitivity analysis of the two-phase two-fluid model based on an approximate Riemann solver
A new shock-capturing upwind numerical solver (i.e. forward solver) and an adjoint sensitivity analysis framework for the two-phase two-fluid model are developed and verified. Both the numerical solver and the adjoint sensitivity analysis framework are based on an analytical analysis of the …
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Finite element analysis of periodic shells and origami tessellations
A numerical solver was designed to determine the effective material properties of smooth and rigid crease origamis. The solver was created using Ansys APDL and Workbench and utilized periodic boundary conditions for efficient unit cell-based simulations. Three origami tessellations were simulated …
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A Python Library For Ion Channel Modeling
… and stimulus definition, complete with a fast numerical solver, andattractive vector graphics plotting.
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A Web-based finite element model for heat transfer
… or steady state heat transfer problems. The numerical solver is based on the finite element method. The program is designed to work with both triangle and quadrilateral elements. In this thesis the development of the finite element method, using the Galerkin weighted residuals method, is …
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Aeroacoustic computation of sound radiation from ducts
… levels. High-performance computers and advanced numerical techniques are now taking an active role in this research area. In this work, a numerical solver is developed to accurately and efficiently predict noise radiation from ducts. The solver is based upon a hybrid methodology whereby only the …
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Thermodynamic modeling of solder melting and solidification for proposed squishbot design
… observations about the behavior of the program's numerical solver, seem to suggest that the proposed joint locking system is feasible. A framework is laid out to proceed with improved and more specific models for use as an optimization tool.
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Complex fluid dynamical computations via the Finite Volume Method
Numerical simulations of the complex flows of viscoelastic fluids are investigated. The viscoelastic fluids are modelled, primarily, via the Johnson-Segalman constitutive model. Our Numerical approach is based on finite volume method, based on the Johnson-Segalman constitutive model and implemented …
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Effect of grazing flow on structural-acoustic response of an elastic plate with sound in a duct
… on this key contribution, this analytical and numerical study focuses on the structural-acoustic interaction of sound with a thin elastic plate mounted flush on a wall in a rectangular duct in the presence of a uniform mean subsonic and supersonic flow. A linear, time-harmonic theory based on …
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Accelerating The Discontinuous Galerkin Cell-Vertex Scheme (Dg-Cvs) Solver On Cpu-Gpu Heterogeneous Systems
… Scheme) is an efficient, accurate and robust numerical solver for general hyperbolic conservation laws. It can solve a broad range of conservation laws such as the shallow water equation and Magnetohydrodynamics equations. Dg-Cvs is a Riemann-Solver-free high order space-time method for …
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Developing a Data-Driven Digital Twin Model for Lubricant Oil Transport and Oil Consumption Study in Internal Combustion Engines
… piston ring pack, which is then coupled with a numerical solver to model the long term oil-gas interaction and subsequently determine the oil consumption rates. Extensive parametric study is performed and results of which demonstrate the effectiveness of the model for a wide range of different …
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A new constitutive and numerical model for arching of cohesive powders in hoppers
… of empirical powder property determination and numerical simulation. Cohesive arching at the outlet is a formation of an arch of cohesive powder (usually fine powder) at the smallest cross-section of a flow channel in a silo (usually the outlet). If it builds up the material inside of the silo, …
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Numerically optimized implementations, mitigation and simulations of polarisation mode dispersion in real-time transmission systems
The aim of this thesis is to present numerical investigations of the polarisation mode dispersion (PMD) effect. Outstanding issues on the side of the numerical implementations of PMD are resolved and the proposed methods are further optimized for computational efficiency and physical accuracy. …
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Acceleration of combustion computation fluid dynamics simulations through machine learning
… in the chemical source term evaluation. Another numerical experiment showed an overall reduction of approximately 30% in computation time. This was achieved by directly replacing the ODE solver for chemical reactions with cost-effective machine learning inference. Moreover, the proposed framework …
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Adaptive Numerical Methods for Elastohydrodynamic Lubrication
Numerical solutions to elastohydrodynamic lubrication problems have been computed for the last half century. Over the past decade multilevel techniques have been successfully applied in several solvers and significant speed-ups achieved. The aim of numerical research in this field is to develop …
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Physics motivated algorithms for partial differential equations
… analytical approaches. Thus, devising efficient numerical algorithms to solve PDEs is important for the study of nonequilibrium systems, and has traditionally been considered a major branch of applied mathematics. A computationally efficient model that captures the crucial physics of a system can …
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Intelligent design of microfluidic components for Newtonian and complex fluid systems
… of microfluidic devices based on theoretical and numerical design rules and algorithms. More specifically, this research focuses on understanding and controlling fluid dynamics in applications involving complex non-Newtonian fluids in shear and extensional flows. Biomimetic principles and shape …
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Dimensionally reduced modeling and gradient-based design of microchannel cooling networks
… reduced thermal and hydraulic models, a numerical solver and a shape optimization scheme. Another goal of this project is to verify and validate the dimensionally reduced models against a commercial computational fluid dynamics software package and experiments. The final goal is to apply …
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