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 48 for “"multi-scale modeling"”.
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MULTI-SCALE MODELING OF HIGH-SHEAR GRANULATION
… of liquid binder. This thesis focuses on the multi-scale nature of high-shear granulation in order to understand behavior changes due to coupled consolidation and coalescence as well as operational changes that occur during the scale up of horizontal ploughshare mixer granulators. The …
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Multi-scale modeling of nanosecond plasma assisted combustion
… experimental investigations, research on modeling and simulation of plasma assisted combustion has received less attention. There is a dire need for development of self-consistent numerical models for construction and validation of plasma chemistry mechanisms. High-fidelity numerical …
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Multi-scale Modeling and Sensitivity Analysis in Biological Systems
<p>We develop a multi-method sensitivity framework, which incorporates two variance-based methods, namely Sobol's method, eFAST and Derivative-based global measures to identify which parameters are most influential to the model outputs. A new implementation version of eFAST, namely DeFAST, was …
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Multi-scale modeling of laser induced breakdown in non-equilibrium plasmas
This dissertation discusses the modeling of breakdown of gases under nano-second laser discharges, the plasma kernel dynamics, the plasma core decay, and the subsequent post-dischargee hydrodynamics, together with some of its engineering applications (e.g., flow control and ignition of combustible …
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Multi-scale modeling of anisotropic polycrystalline plasticity in a shaped charged liner
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Multi-scale modeling of the hydrodynamics, sediment transport, and morphodynamics in the nearshore
… always been demanding in coastal zones. Here, a multi-scale modeling approach was taken to study the hydrodynamics and the underlying sediment transport and morphodynamics for a variety of bed sediment configurations under different wave conditions. First, using a laboratory-scale model (scale of …
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Road Surface Measurement and Multi-Scale Modeling of Rubber Road Contact and Adhesion
… of this research is to develop a physics-based multiscale rubber-road friction model that can predict the effectiveness of the tire as it interacts with the vehicle and the pavement. The model is developed based on sound physics and contact mechanics theories and uses road profile measurements …
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Multi-Scale Modeling for Analysis and Design of Transcranial Electric and Magnetic Brain Stimulation
… neural circuits. This dissertation presents multiscale computational models that predict the neural response to TMS and tES at the single-cell and population levels for analysis and rational design of transcranial brain stimulation.We adapted biophysically-realistic models of cortical neurons …
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Variational multi-scale modeling for particle-laden gravity currents over flat and triangular wavy terrains
We deploy the residual-based variational multi-scale (RBVMS) method for simulating dilute particle-laden currents at large Reynolds number Re = 10000. The physical model is based on the coupling balance of fluid momentum and convection and diffusion. We derive the RBVMS formulation for the weak form …
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Investigation on Physics-based Multi-scale Modeling of Contact, Friction, and Wear in Viscoelastic Materials with Application in Rubber Compounds
… aims to contribute towards the understanding and modeling of tribological phenomena of contact, friction, and wear in viscoelastic materials with application in rubber compounds. Tribiological properties of rubber compounds are important for many applications such as tires, shoe heels and soles, …
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A multi-scale modeling study of the impact of land surface heterogeneity on the convective boundary layer in the U.S. Midwest
… are determined by atmospheric oscillations on multiple temporal and spatial scales. The principal factors contributing to the growing season rainfall in the U.S. Midwest include synoptic scale moisture intrusion into the region from the Gulf of Mexico through the Great Plains Low Level Jet …
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A molecular dynamics simulation based principal component analysis framework for computation of multi-scale modeling of protein and its interaction with solvent
… normal modes and interactions over time scales that are computationally challenging. It also provides a starting point for experimental and further computational studies of protein conformational changes. A protein's function is sometimes linked to its conformational flexibility. Normal …
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Multi-scale modeling tools for coupled reaction, phase equilibrium and two-phase mixing phenomena with application to supercritical water heavy oil upgrading process
… tools to simulate such processes at different scales with varying levels of fidelity in describing the underlying physical phenomena. Over the past decade, a number of experiments have been performed in batch reactors to study the upgrading of various heavy oils and crude oil vacuum residua …
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Mechanical Properties Of Portland Cement And Its Constituents At The Nano-Level
… portion of the project titled Nano to Continuum Multi-Scale Modeling Techniques and Analysis For Cementitious Materials Under Dynamic Loading in association with North Carolina Agricultural & Technical State University and the US Army. This research investigates several attempts at creating a …
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Exploring the Stochastic Performance of Metallic Microstructures With Multi-Scale Models
… properties of Ti-7Al. The homogenized macro-scale material properties are directly related to the crystallographic structure at the micro-scale. Furthermore, microstructural uncertainties arising from experiments and computational methods propagate on the material properties used for …
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Multiscale Modelling of Molecules and Continuum Mechanics Using Bridging Scale Method
his PhD dissertation is about developing a multiscale methodology for coupling two different time/length scales in order to improve properties of new space materials. Since the traditional continuum mechanics models cannot describe the influence of the nanostructured upon the mechanical properties …
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Learning to Model Atoms Across Scales
… are extremely complex, requiring highly accurate modeling of many atoms for a considerable period to study. Computational chemistry methods may not be accurate or efficient enough, limiting the applicable domains and scales. Furthermore, discovering new materials and drugs requires novel candidate …
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Mathematical models and numerical methods for the movement and life cycle of invasive pests across multiple scales
… managing these invasive pests is mathematical modeling, which enables forecasting of movements and the establishment potential of invasive species in an area, and can provide warnings to practitioners. In particular, principled models coupled with well-designed numerical methods enable …
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