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 56 for “"water model"”.
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Evaluation of Snow and Streamflow in the National Water Model with Analysis using Machine Learning
… and snowmelt from the mountains is a vital water source for downstream communities dependent on snow fed lakes, rivers and streams. This study explored the snow and streamflow prediction capabilities of process-based numerical prediction and data-driven machine learning models.</p> <p>The …
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A physical assessment of Snake Pond of Cape Cod, Massachusetts, including a thermal and surface/ground water model
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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The Economic Water Model - a method and software program for assessing the impacts of storm water "green solutions" in urban areas
A new model is needed for storm water "green solutions" such as rain gardens, bioswales, and rain barrels. Estimating average annual runoff at the property level is essential to providing precise estimates on the effectiveness of stormwater “green solutionsâ€� like rain barrels and rain gardens. …
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Model studies of plasma heating in the continuous casting tundish.
A room temperature water model of a tundish was design, constructed and operated. The model was equipped with a steam heating system that simulates that simulates the tundish plasma heating systems operated by some of the more modem continuous casting plants. Similarity between steam heating in the …
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Application of the Hydraulic Analogy to Internal Subsonic Flow
… the degree of correlation between an air and water model of a typical pure fluid element. The fluid element used in the experimental program was a nonsymmetrical flow divider. It was shown that, in spite of the many simplifying assumptions made in the analogy, the quantitative data correlated …
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The role of wavenumber one and two in the development of sudden stratospheric warmings
… We use MERRA reanalysis data and the FMS shallow-water model to compare and contrast their propagation into the stratosphere, their interactions within the stratosphere, and their effects on the polar vortex. The results have implications for the predictability of sudden stratospheric warmings …
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Mathematical modeling of the fluid flow, multicomponent slag-metal reactions and desulfurization efficiency in gas-stirred ladles
… transient computational fluid dynamics (CFD) model was developed to simulate the fluid flow, phase interfaces and slag-eye characteristics as well as the slag-metal reactions and desulfurization efficiency in the gas-stirred ladles. The volume of fluid (VOF) model, discrete phase model (DPM), …
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Modulational instability in some shallow water wave models
… phenomenon of Stokes' periodic waves on the water surface. In this dissertation, we study this phenomenon for periodic traveling wave solutions of various shallow water wave models. We study the spectral stability or instability with respect to long wave length perturbations of small …
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Molecular modeling of water and aqueous electrolytes under electric field: thermal, dielectric, and transport properties
Water plays a critical role in thermal transport, electrochemical energy storage, and electrically driven interfacial phenomena. Accurately capturing its coupled thermo-electrical behavior remains a challenge in MD simulations. This study combines machine learning, and MD simulations to provide a …
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SIMULATION OF ABSORPTION CYCLES FOR INTEGRATION INTO REFINING PROCESSES
… energy efficiency. This thesis details the modeling procedure for single and double effect water/lithium bromide and single effect ammonia/water chillers. Comparison of these models to published modeling results and experimental data shows acceptable agreement, within 5% for the …
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NORMAL MODE SPECTRA OF SOUND WAVES IN VISCOUS SOLID AND FLUID MEDIA WITH PARTICULAR APPLICATIONS TO SHALLOW WATER ACOUSTICS
<p>Sound propagation in shallow water is modelled using the Green's function formalism and normal mode techniques. The water layer is bounded above by a pressure-released condition and below by a halfspace of viscoelastic solid media. Nine different marine sediments are investigated by …
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Optimal Point Charge Approximation: from 3-Atom Water Molecule to Million-Atom Chromatin Fiber
Atomistic modeling and simulation methods enable a modern molecular approach to bio-medical research. Issues addressed range from structure-function relationships to structure-based drug design. The ability of these methods to address biologically relevant problems is largely determined by their …
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Ground water-surface water interaction of Rio Grande Biopark area, Albuquerque, New Mexico
Ground water and surface water are typically considered as separate entities, but all surface water features interact with ground water in different ways. Better understanding of ground water-surface water interaction is important for effective land and water management. This study investigated the …
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Theory and Applications of Fluctuating-Charge Models
Fluctuating-charge models are computationally efficient methods of treating polarization and charge-transfer phenomena in molecular mechanics and classical molecular dynamics simulations. They are also theoretically appealing as they are minimally parameterized, with parameters corresponding to the …
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Transient Study of Turbulent Flow and Particle Transport During Continuous Casting of Steel Slabs
… approach. A criterion was developed to model particle pushing and capture by the solidifying shell and was incorporated into the particle transport model. The criterion was validated by reproducing experimental results in different systems. The particle transport model was applied to a …
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A finite element model of submarine ground water discharge to tidal estuarine waters
In the research presented here, a new ground water model, FEMCoast, was developed to simulate ground water discharge to the intertidal zone of estuarine systems. This research may be the first attempt to model the ground water discharge process in a tidal estaurine system. The development of FEM …
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Developing Fast and Accurate Water Models for Atomistic Molecular Dynamics Simulations
Water models are of great importance for different fields of studies such as fluid mechanics, nano materials, and biomolecule simulations. In this dissertation, we focus on the water models applied in atomistic simulations, including those of biomolecules such as proteins and DNA. Despite water's …
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Tropical transport and the seasonal variability of the subtropical "edges" in the stratosphere
… using three very different tools: a simple model of stratospheric transport, which allows us to investigate the role of tropical transport in determining global transport timescales, satellite observations of long-lived tracers, which allow us to diagnose the seasonal variability of the …
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Rain Induced Runoff Simulation Using A 2D Numerical Model
… retention. In this study, CCHE2D, a numerical model for free surface flow hydrodynamics, is applied to study the rain induced runoff and channel flow mixed problems. The main goal of this study is to incorporate rainfall as an input into the existing free surface flow model, CCHE2D; to verify …
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Realistic natural atmospheric phenomena and weather effects for interactive virtual environments.
… and weather effects. The system simulates water vapour, cloud water, cloud ice, rain, snow and hail. The water model incorporates control parameters and the cloud model uses an arbitrary vertical temperature profile, with a tool described to allow the user to define this. The result of this …
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