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 133 for “"Coupled Model"”.
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Studies of climate variability in a simple coupled model
The mechanisms of variability of a coupled atmosphere-ocean model are investigated through the study of two coupled configurations: an aquaplanet in which gyres are absent, and an aquaplanet in which a ridge extending from pole to pole supports gyres. Empirical Orthogonal Functions (EOFs) are used …
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Coupled model transformations for QoS enabled component-based software design
… based on its constituting components. As models are used during software design but performance is a run-time attribute, the necessary abstraction in models from implementation details might remove performance-relevant aspects resulting in a loss of prediction accuracy. The solution …
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Future climate evolution in the canary current upwelling system from a regional coupled model
… of the CCUS using an atmosphere¿ocean regionally coupled model. The regional coupled model consists of a global oceanic component with increased horizontal resolution along the northwestern African coast (reaching the 5 km in Cape Ghir) coupled to a high-resolution regional atmosphere (25 km), …
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Analysis of Memristor Hysteretic Systems: A Hybrid Coupled Model with emphasis on Pinching/Degrading Behavior
This thesis proposes a novel model that accurately captures the asymmetric hysteretic behavior of memristive devices exhibiting self-crossing hysteresis loops. The proposed model combines the Bouc-Wen Baber-Noori model with other non-linear elements in the resistive switching process. Existing …
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An Aquifer-Well Coupled Model: a Refined Implementation of Wellbore Boundary Conditions in Three-Dimensional, Heterogeneous Formations
… to two widely used numerical groundwater flow models in an effort to improve upon the interaction between a well of finite length and conductivity with the surrounding formation. The first objective is to discard the common assumptions about flux- or head-based boundary conditions along the …
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A coupled model for ring dynamics, gas flow, and oil flow through the ring grooves in IC engines
… is intended to improve the understanding and modeling capability on this important oil transport mechanism for better analysis in engine oil consumption. A model incorporating ring dynamics, gas flow, and oil flow was developed to study oil transport in the piston ring-pack system. The major …
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Aerosol-Cloud interactions : a new perspective in precipitation enhancement
… and precipitation formation. We develop a new coupled model in which a very detailed model of aerosol activation is coupled to a three-dimensional cloud resolving model. This coupled model can accurately represent different kinds of aerosol populations. This coupled model is used to investigate …
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Modeling and Sensitivity Analysis for Trace Gas Sensors
… modulated laser to detect trace gases. Existing models of QEPAS sensors employ one-way coupling from the fluid to the structure that requires prior experimental measurements of the damping of the QTF due to its motion in the viscous fluid. We study an improved two-way coupled model that is based …
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A Dynamic Coupled Magnetosphere-Ionosphere-Ring Current Model
In this thesis we describe a coupled model of Earth's magnetosphere that consists of the Lyon-Fedder-Mobarry (LFM) global magnetohydrodynamics (MHD) simulation, the MIX ionosphere solver and the Rice Convection Model (RCM). We report some results of the coupled model using idealized inputs and …
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Dependence of tropical precipitation on changes in cross-equatorial atmosphere and ocean heat transport in global warming simulations
… ocean heat transport. In this study, we use Coupled Model Intercomparison (CMIP) output to determine the thermal forcings that result in hemispheric heating asymmetries and induce an ITCZ shift in the 21st century. Using a fully coupled model we also determine the atmosphere will transport …
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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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A Novel Dual Modeling Method for Characterizing Human Nerve Fiber Activation
… investigation and successful illustration of a coupled model of the human nerve fiber. SPICE netlist code was utilized to describe the electrical properties of the human nervous membrane in tandem with COMSOL Multiphysics, a finite element analysis software tool. The initial research …
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Three-Dimensional Volume Averaged Soil-Moisture Transport Model: A Scalable Scheme for Representing Subgrid Topographic Control in Land-Atmosphere Interactions
… A conjunctive surface-subsurface flow model at a large scale, a 1-D Diffusion Wave (DW) surface flow model interacting with the 3-D VAST model, is developed for the comprehensive terrestrial water and energy predictions in LSMs. For the implementation of the model, the mixed numerical …
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Evaluating the relationship between the temperature response to volcanic aerosols and climate sensitivity
… climate sensitivity is correlated across Coupled Model Intercomparison Project Phase 3 (CMIP3) models to the ratio of surface temperature response to top-of-atmosphere shortwave radiation response following Pinatubo, when excluding one anomalous model. In this thesis, Bender et al.'s …
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3-D Modeling of Nearshore Circulation Using ROMS-SWAN: Model Upgrades and Evaluation
<p>Regional Ocean Modeling System (ROMS v 3.0), a three dimensional numerical model, was recently modified for shallow water applications by including wave induced radiation stresses provided through coupling with a wave propagation model (e.g., SWAN, REF/DIF). The coupled model has been applied to …
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Peridynamic Modeling of Coupled Mechanical Deformations and Transient Flow in Unsaturated Soils
<p>A coupled peridynamic model for mechanical deformations and transient moisture flow in unsaturated soils is developed. The model is capable of simulating the emergence and evolution of cracks triggered by volumetric strains in the soil which are associated with changes in moisture content. The …
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Investigações sobre um esquema numérico desacoplado para modelos de circulação
The numerical modelation by the means of finite elements can represent the frontiers of an irregular water body more eficiently than those models employing finit differences. However, finit differences models are usually solved through highly efficient algorithims, such as the ADI (Alternate …
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A coupled electromagnetic and heat transfer finite-element model for simulating microwave processing of composite materials in a cylindrical resonant cavity
A coupled electromagnetic/heat transfer model capable of simulating microwave processing of composite materials in a cylindrical resonant cavity was developed. The two-dimensional model simulates processing of axisymmetric material loads in cylindrical resonant cavities operating in the TM₀₁₀ mode. …
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Area-average representation of land surface covers in large atmospheric models based on remotely sensed land surface cover data
… continental surfaces in global climate models. The problem it addressed was that current understanding of soil-vegetation-atmosphere interactions is considered only to be relevant to small plots of uniform vegetation with dimensions of the order 10-1000 m but, in order to provide …
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