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 636 for “"numerical modeling"”.
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Numerical modeling of suspension flows
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1999.
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Numerical modeling of wetland hydrodynamics
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Numerical Modeling of Blast-Induced Liquefaction
… The simulation procedure involved the modeling of a three-dimensional half-space soil region with pre-defined, embedded, and strategically located explosive charges to be detonated at specific time intervals. LS-DYNA, a commercially available finite element hydrocode, was the solver …
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3-D Numerical Modeling of Turbidity Currents
… and the transport and deposition of sediment. Numerical modeling of turbidity currents can provide valuable insights into current dynamics including turbulence structures and their ef- fects on deposit thickness, grain size, and distribution pattern. Proper modeling of turbulence in these …
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Numerical modeling of electron cyclotron resonance plasma
The semiconductor industry is introducing electron cyclotron resonance (ECR) plasma reactors as reliable wafer etching tools. This industry requires radially uniform etching rate and radially uniform etching anisotropy. The etching rate and etching anisotropy depend on the ECR plasma properties.
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Numerical modeling of microstrip circuits and antennas
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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LHD vibrations analysis and numerical modeling during operations
… focused on developing valid analytical and numerical models for determining the vibration propagation in LHDs. Also, this research pioneered the development and analysis of comprehensive dynamic virtual models of LHDs with detailed vibration analysis of the operator-seat interface. The …
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Numerical Modeling of Turbulent Combustion and Flame Spread
… to address several important aspects of numerical modeling of turbulent combustion and flame spread. The developed models include a pyrolysis model for charring and non-charring solid materials, a fast narrow band radiation property evaluation model (FASTNB) and a turbulence model for …
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Numerical modeling study on meandering and cutoff dynamics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Numerical modeling of methane venting from lake sediments
… by changes in hydrostatic load. The mechanistic, numerical model is tuned to and compared against ebullition data from Upper Mystic Lake, MA, and the predictions match the daily temporal character of the observed gas releases. We conclude that the combination of plastic gas cavity deformation and …
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Fully kinetic numerical modeling of a plasma thruster
… with conductive acceleration channel walls was numerically modeled using 2D3V Particle-in-Cell (PIC) and Monte-Carlo Collision (MCC) methodolo- gies. Electron, ion, and neutral dynamics were treated kinetically on the electron time scale to study transport, instabilities, and the electron energy …
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Numerical Modeling of Air Cushion Vehicle Flexible Seals
… that affect performance is through high fidelity numerical simulation. As previous numerical efforts have employed separate iterative partitioned solvers, or have implemented simplified physics, the approaches have been complex, computationally expensive, or of limited utility. This research …
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Numerical Modeling and Prediction of Bubbling Fluidized Beds
Numerical modeling and prediction techniques are used to determine pressure drop, minimum fluidization velocity and segregation for bubbling fluidized beds. The computational fluid dynamics (CFD) code Multiphase Flow with Interphase eXchange (MFIX) is used to study a two-stage reactor geometry with …
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Numerical Modeling of Synthetic Vortical Disturbance Interactions Using OpenFOAM
<p>Nowadays, the number of Advance Air Mobility (AAM) Electic Vertical Take-off and Landing (eVTOL) concepts is rapidly increasing due to their capability of vertical take-off and landing at vertiports located on rooftops of tall urban buildings, which does not require using the ground space in a …
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Numerical modeling of chemical recovery from black liquor char
A complete CFD model for the char burning stage of chemical recovery from black liquor is presented. Chemical recovery from black liquor is characterized by the occurrence of multiple, simultaneous reactions occurring in dynamic flow conditions. Rate equations for the different chemical reactions …
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Multiscale Numerical Modeling and Characterization of Carbon/Carbon Composites
… scientists and engineers with substantial modeling challenges when it comes to predicting material's behavior under various loading conditions. My research has been focused on characterization, mutliscale modeling and mechanical testing of this composite. A set of new elasticity solutions …
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Advanced Numerical Modeling Techniques For Modern Waste Management Systems
… presents original results to the advancement of numerical modelling of a modern waste management system with respect to generation, collection, and disposal of non-hazardous solid waste. The first part of the thesis specifically look at lag times relating to variables that attempt to predict …
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