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 6 of 6 for “"adaptive grids"”.
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Modelling of premixed laminar flame propagating in channels
… higher than 200. For large &, the computational grids should be very fine because of the small thickness of preheat zone. The Generalized Curvilinear Coordinate Gridding method is introduced and an elliptic grid generator based on the variational approach is employed to construct the …
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Dynamic grid adaption using the LPE equation
… the development and implementation of a dynamic adaptive grid method for general two and three dimensional static and transient fluid flow problems solved over structured grids. The technique automatically manipulates the location of grid points within the domain of interest to concentrate cells …
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Very large eddy simulations of spatially evolving supersonic turbulent shear layers
… Transport (FEM-FCT) scheme with unstructured adaptive grids. In general, it was found that the highest simulation fidelity was obtained by using a full turbulence spectra consistent with measured turbulent kinetic energy levels and an incompressible wavelength distribution. This model is the …
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Accelerated Ray Traced Animations Exploiting Temporal Coherence
Ray tracing is a well-know technique for producing realistic graphics. However, the time necessary to generate images is unacceptably long. When producing the many frames that are necessary for animations, the time is magnified. Many methods have been proposed to reduce the calculations necessary …
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Nonequilibrium green function approach to elastic and inelastic spin-charge transport in topological insulator-based heterostructures and magnetic tunnel junctions
… theory in finding inverse of a sparse matrix, adaptive grids for integrations and programming languages ({\it e.g.,} MATLAB and C++) and distributed computing tools (MPI, CUDA). Outline of the Thesis: After giving an introduction to the topics covered in this thesis in Chapter 1, I present the …
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Entwicklung eines effizienten Verfahrens zur Simulation kompressibler Strömungen in 3D auf Parallelrechnern
… ein. Dies gilt insbesondere für die modernen adaptiven numerischen Verfahren, die durch eine an die sich dauernd ändernde berechnete Näherungslösung angepasste Verteilung der Freiheitsgrade eine entscheidend verbesserte Genauigkeit erreichen. Diese sich kontinuierlich ändernden Zusammenhänge …