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 23 for “"three-dimensional simulation"”.
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Three dimensional simulation of functional neuro-vascular imaging
… large volumes of turbid media. For this reason, three dimensional Monte Carlo simulations of light propagation combined with high resolution vascular anatomy were used to directly simulate FLIM and LSCI in the brain. Using these simulations, the imaging depth, degree of multiple scattering, and …
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Three-dimensional simulation of coherent inverse Compton scattering
… novel sources requires improvements to existing simulation routines to incorporate Coulomb forces among particles and effects related to the phase of emitted radiation. This thesis develops a numerical routine for calculating the radiation scattered by electrons counter-propagating with a …
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Three dimensional simulation of ultrasonic cleaning vessels and verification of results
… detailing the mathematical modelling behind the simulation system and the logical progression of the work, from basic 2D models used for rapid prototyping to full 3D models used to simulate a wide variety of complex systems with parameters hitherto un-described within the literature. A variety of …
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The need for and the use of three dimensional simulation in dental education
… the growing number of publications relating to three-dimension (3D) and education, the need for this technology, its usability and educational impact are not clear for dental education with the exception of haptics. The first stage of this doctoral research used a mixed method to examine key …
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Three-dimensional simulation of thermo elastic plastic plate bending by the line heating method
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1989.
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Modeling and computer simulation of tumor growth and tumor response to radiotherapy
… a cellular radiobiological model and to develop three-dimensional simulation methods that allow simulation of tumors with clinically relevant sizes. Simulations of unperturbed tumor proliferation are compared to corresponding experimental growth curves in vivo. The most important radiobiological …
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Estimation of axial compressor body forces using three-dimensional flow computations
… curvature calculation and an unsteady, three-dimensional flow simulation. A two-dimensional body force representation is defined as a benchmark to evaluate the departures of the computed forces from two-dimensional behavior. The most important contribution to this departure (for both the …
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Three-Dimensional, Vision-Based Proportional Navigation for UAV Collision Avoidance
… (CAS), most approaches are focused on two-dimensional environments. In order to operate in complex three-dimensional urban environments, three-dimensional collision avoidance systems are required. This thesis develops a three-dimensional vision-based collision avoidance system to provide …
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Enriching low-order finite elements by interpolation covers
… of the adaptivity is illustrated by two- and three-dimensional simulation examples.
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High-resolution simulation of pattern formation and coarsening dynamics in 3D convective mixing
… C0₂ sequestration by means of high-resolution three-dimensional simulation. We find that the C0₂ concentration field self-organizes as a cellular network structure in the diffusive boundary layer right beneath the top boundary. By studying the statistics of the cellular network, we identify …
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A computational and experimental investigation into the aeroacoustics of low speed flows
… generation and far field radiation. Numerical simulations are performed to investigate the tonal noise radiated by two- and three-dimensional cavities submerged in low-speed turbulent and laminar flows. A numerical approach is developed that combines near field flow computations with an …
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Mechanistic study of slug formation and evolution in high-viscosity-liquid/High-density-gas multiphase flows in channels/pipes
… Immersed Flow (FCIF) solver for the three-dimensional simulation of fluid-fluid interaction by coupling two distinct flow solvers using an Immersed Boundary (IB) method. The FCIF solver captures dynamic interactions between two fluids with disparate flow properties, while retaining …
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Direct and large-eddy simulation of interactions between reacting flows and evaporating droplets
… understanding of complex interactions. Numerical simulations can overcome these limitations, but are restricted by the available computer capacity. Therefore, most previous simulations in the field employ simplifications such as a two-dimensional configuration, the Eulerian description of the …
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Next Generation Algorithms for Magnetically Confined Fusion Reactor Simulations
… for whole-system nuclear fusion reactor simulations, with a focus on predicting and understanding non-linear MHD (magnetohydrodynamics) plasma instabilities and disruption events. The objective is to model all reactor regions (plasma, quasi-vacuum, and containment vessel) within a single …
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Adaptive Spline-based Finite Element Method with Application to Phase-field Models of Biomembranes
… basis is obtained as a tensor product of the one-dimensional basis. This necessitates a rectangular grid that cannot be refined locally in regions of embedded interfaces. To address this issue, we develop an adaptive spline-based finite element method that employs hierarchical refinement and …
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The prediction of flux decline in cross-flow microfilters via three-dimensional fluid dynamic models of tortuous pore structure
… the associated effect on flux decline. A three-dimensional tortuous pore geometry was created to study the development of fouling mechanisms via a fluid dynamic model. The geometry was obtained by reconstructing a three-dimensional geometry from images of two-dimensional cross-sectional …
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Lagrangian Visualization and Real-Time Identification of the Vortex Shedding Time in the Wake of a Circular Cylinder
… the control techniques. In the current work, two-dimensional, two-component velocity data was collected in the wake of a circular cylinder using a planar digital particle image velocimetry (DPIV) measurement system at Reynolds numbers of 9,000 and 19,000. This experimental data, as well as …
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Numerical and analytical modelling of battery thermal management using passive cooling systems
… single battery to module level. A simplified one-dimensional transient computational model of a prismatic lithium-ion battery cell is developed using thermal circuit approach in conjunction with the thermal model of the heat pipe. The proposed model is compared to an analytical solution based on …
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Numerical simulation of mechanofusion system for dry particle coating process
A numerical simulation of the Meclianofusion device for dry particle coating is carried out using Discrete Element Method (DEM) technique. In dry particle coating, tiny sub-micron guest particles are coated onto larger micron sized host particles by using mechanical forces, which the Mechanofusion …
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