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 125 for “"scale modeling"”.
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Dynamic scale modeling of bed configurations.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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MULTI-SCALE MODELING OF HIGH-SHEAR GRANULATION
… 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 methodology …
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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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Fine-scale modeling of failure in an adhesive layer
… thesis presents the results from a fine scale modeling of the removal of a layer of filter cake by a time dependent pressure pulse. In this model the filter cake is grid in 16,000 imaginary blocks on a filter, of area 160 cm2. The cleaning of the filter is simulated through 10 consecutive …
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Cross-scale Modeling of Functional Grading in Musculoskeletal Tissues
… aims to identify, through mathematical modeling of graded tissue regions, the ways that these regions contribute to physiological function, and the ways that the degeneration of these regions contribute to pathology. The dissertation introduces new modeling tools for this purpose. By …
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Multi-scale Modeling and Sensitivity Analysis in Biological Systems
… Sensitivity analysis is a powerful tool in the modeling process that can be leveraged in various ways including model reduction and model fitting to data. There are two novel models that have been developed in this work where sensitivity analysis was applied. A stochastic computational model was …
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Scale Modeling of Tests with Combined Thermo-Structural Loading
… for fire resistance testing require large-scale assemblies and are typically conducted on specialized furnaces at considerable cost. This research focused on developing a scaling methodology for a reduced-scale fire resistance test that reduces the size of the test article while maintaining …
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PNA-protein conjugates for nano-scale modeling of protein aggregates
Abstract Programmable assembly of proteins on molecular frameworks requires the development of facile and orthogonal chemical approaches and molecular scaffolds. In this research, the unique characteristics of PNA were applied to create controllable protein assemblies directed by precise PNA-DNA …
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Thermomechanical Meso-Scale Modeling of Combustion of Heterogeneous Solid Propellants
In the final part of this dissertation, the coupled thermomechanical and propellant surface regression solver is further enhanced through addition of fluid-phase equations for transport of chemical species and temperature. A simple three-step kinetics model is used to describe the complex reactions …
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Multi-Length Scale Modeling of Rubber Tribology For Tire Application
… interface. Past research studies developed multiscale techniques for estimation of friction coefficient due to hysteretic losses from internal damping of the rubber material because of oscillation from surface undulations. Later, contact mechanics models developed using Hertzian technique or …
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Wellbore Microannulus Characterization and Seal Repair: Computational and Lab Scale Modeling
… of the joint model with a thermally active large-scale reservoir coupled with pore pressure caused by dynamic CO2 injection and subsequent microannulus region affects.
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Subgrid Scale Modeling for Large Eddy Simulation of Buoyant Turbulent Flows
… buoyant turbulent flows, requires accurate modeling of the subgrid sclae (SGS) momentum and buoyancy fluxes. This thesis presents a series of LES and direct numerical simulation (DNS) studies towards a priori and a posteriori evaluation of existing SGS models, and development of new SGS …
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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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SCALE MODELING OF THE TRANSIENT BEHAVIOR OF HEAT FLUX IN ENCLOSURE FIRES
… the scaling hypotheses were conducted at two scales. Wood cribs were used to model a fuel load. The repeatability of wood crib fires has been demonstrated. Experimental results indicate that radiation heat flux scales according to the thermally thick emissivity criteria. Convective heat flux …
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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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Chip-scale modeling of pattern dependencies in copper chemical mechanical polishing processes
… thesis, the first predictive semi-physical chip-scale pattern dependent model for copper CMP processes is developed. A comprehensive model calibration methodology for any multi-step copper CMP process is also developed. The model takes into account the initial long range electroplated topography, …
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Multiphysics Transport in Heterogeneous Media: from Pore-Scale Modeling to Deep Learning
… of these applications. In this dissertation, nanoscale transport phenomena in porous media are studied through physics-based simulations, and the effective solution of forward and inverse transport phenomena problems in heterogeneous media is tackled using data-driven, deep learning approaches. …
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Multi-scale modeling of the hydrodynamics, sediment transport, and morphodynamics in the nearshore
… 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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