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 15 of 15 for “"Finite Difference Method (FDM)"”.
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Medial surface transformations for rapid approximation of casting solidification
… spots and cooling patterns. Comparison with a finite difference method (FDM) solution showed that the locations and shapes of hot spots predicted by FDM converge to the shapes and locations predicted by the experimental software.
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Efficient numerical methods for the valuation of American barrier options
… particular interest to study efficient numerical methods for the valuation of American barrier options . This thesis considers three methods that have been developed to price such options; the Ritchken Trinomial Method <RTM), the Finite Difference Method <FDM> and the Finite Element Method <FEM>. …
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Method for Evaluating Changing Blood Perfusion
This thesis provides insight into methods for estimating blood perfusion, emphasizing the need for accurate modeling in dynamic physiological environments. The thesis critically examines conventional error function solutions used in steady state or gradually changing blood flow scenarios, revealing …
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An investigation into the performance of a very shallow borehole thermal energy store for a solar-assisted ground source heat pump
… time of simulation was carried out between the Infinite Line Source (ILS) model, the Infinite Cylindrical Source (ICS) model, and a new model developed by the author based on the Finite Difference Method (FDM). To consider in the model the interaction between adjacent boreholes as well as the …
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Predicting the Spatial Output Field of a Laser Beam in a Thermally Self-Induced Inhomogeneous Medium
… and the transverse wave assumption. An explicit, finite-difference method (FDM) for solving the heat diffusion equation is coupled with an implicit FDM solution of the paraxial wave equation. The reasons for choosing these schemes are presented, along with a mixed-mode parallelization method in …
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Modal Analysis of a Discrete Tire Model and Tire Dynamic Response Rolling Over Short Wavelength Road Profiles
… are usually extracted using a detailed finite element model. The main issue with full modal models (FEA, for example) is the inability to integrate the tire modal model with the vehicle models to tune the suspension system for optimal ride comfort. An in-plane rigid–elastic-coupled tire …
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Performance Modeling, Optimization, and Characterization on Heterogeneous Architectures
… modeling application that is based on the finite difference method (FDM), using MPI and CUDA over a hybrid CPU+GPU cluster. We describe the generic computational complexities involved in porting such applications to the GPUs and present our strategy of efficient performance optimization and …
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A tool for analyzing the evolution of non-uniformities in lithium-ion cylindrical battery cells at the module level under various operating conditions
… cylindrical lithium-ion batteries along with a finite difference thermal model for spatial temperature prediction of cylindrical cell These models address key challenges in simulating real-world battery behavior. The electrical model utilizes a 2 R-C pair equivalent circuit framework integrated …
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A boundary integral equation approach to three dimensional electromagnetic wave scattering problems
… that is usually possible in purely analytical methods, it provides valuable insight into the physics of actual problems. Second, forward scattering models are important in solving the inverse problem where the scattered fields are used for characterizing the size, the shape and the constitution …
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A High-Resolution Microscopic Electrical Impedance Imaging Modality: Scanning Impedance Imaging
… electrical impedance imaging typically involve methods that either increase image resolution or image contrast. This study investigates the possibility of the resolution improvement for electrical impedance imaging using motion, and presents a novel high-resolution and calibrated impedance …
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A Two-Dimensional Heterogeneous Numerical Model for Auto-Thermal Reforming of Synthetic Crude Glycerol in a Packed Bed Tubular Reactor
… it proves advantageous to apply reforming methods to this feedstock to produce hydrogen. This work presents numerical models for a catalytic auto-thermal reforming (ATR) process developed for converting synthetic crude glycerol (CG) to hydrogen gas in packed bed tubular reactor (PBTR). The …
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Heat Transfer During Melting and Solidification in Heterogeneous Materials
… heat transfer process is solved using the energy method. The investigation is conducted in several phases using a building block approach. First, a lumped capacity system during phase transition is studied, then a one-dimensional homogeneous material during phase change is investigated, and …
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Study of induced seismicity for reservoir characterization
… of the development and applications of three new methods, each of which focuses on a different aspect of fractures/faults and the resulting seismicity. In general, the thesis work discusses reservoir characterization from two aspects: 1) understanding fractures and faults in reservoirs as seismic …
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Nonlinear Dynamics of Tapping Mode Atomic Force Microscopy
… model based on a differential quadrature method (DQM) is employed to explore the dynamics of the AFM probe in the bistable phase where the multimode Galerkin procedure is computationally expensive. We found that the DQM with a few grid points accurately predicts the static bifurcation …
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Frequency Effect on Peak Pressure Coefficients Using the Narrowband Synthesis Random Flow Generator (NSRFG) Method
… the development of computing software, numerical methods based on computational fluid dynamics (CFD) have been adopted to study peak pressures produced by wind forces on infrastructure. Once CFD measurements show a good agreement with field measurements and experimental measurements, CFD has the …