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 8 of 8 for “"Large Time Step"”.
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Large Time Step and Overlapping Grids for Conservation Laws
One focus of this dissertation is to construct a large time step Finite Volume Method for computing numerical solutions to hyperbolic systems of conservation laws. We also consider a method of overlapping spatial grids for which variants have proved to be an important consideration in large scale …
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An efficient multinomial sampling algorithm for spatially distributed stochastic particle simulations
… adjacent sub-volumes in the domain at each time-step. The particle-resolved method is compared with the traditional finite volume and Monte Carlo methods. Stability and convergence of the particle method are also investigated. We extend the particle grid method (PGM) to the large time-step …
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High Resolution Time-Limiter Schemes for Conservation Laws
This study investigates the high resolution time-limiter schemes for conservation laws. These schemes are proposed (K.Duraisamy, J.D.Baeder, J-G Liu, 2003) to enhance the stability of high order implicit time marching when the time step is beyond the original TVD limit. The improved stability is …
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A consistent segment procedure for solution of 2D contact problems with large displacements
… for the analysis of contacting bodies undergoing large displacements. A sub-segment approach is adopted, which allows the algorithm to pass the contact patch test. Passing the patch test is a fundamental requirement for optimal convergence of the finite element solution. The algorithm is a …
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Modeling of Power Electronics Distribution Systems with Low-frequency, Large-signal (LFLS) Models
… uses new types of models called low-frequency, large-signal models in a circuit simulator (Saber) to model a complex hybrid ac/dc power electronics system. The new achievement in this work is being able to model the different components as circuit-based models and to capture some of the …
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Matrix-free time-domain methods for general electromagnetic analysis
… demand an efficient computational solution of large-scale problems. If a computational method can be made free of matrix solutions, then it has a potential of solving very large scale problems. Among existing computational electromagnetic methods, the explicit finite-difference time-domain …
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Fast time- and frequency-domain finite-element methods for electromagnetic analysis
<p>Fast electromagnetic analysis in time and frequency domain is of critical importance to the design of integrated circuits (IC) and other advanced engineering products and systems. Many IC structures constitute a very large scale problem in modeling and simulation, the size of which also …
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Efficient coarse-grained brownian dynamics simulations for dna and lipid bilayer membrane with hydrodynamic interactions
… systems such as a single DNA macromolecule to large and complicated systems, for instances, vesicles and red blood cells (RBCs), the numerical results have shown outstanding agreements with experiments and continuum modeling by adopting Stokesian dynamics and explicit solvent model. Finally, …