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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 11 of 11 for “"convection-diffusion problems"”.
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Layer-adapted meshes for convection-diffusion problems
… on numerical methods for singular perturbation problems - in particular stationary convection-dominated convection-diffusion problems. More precisely it is devoted to the construction and analysis of layer-adapted meshes underlying these numerical methods. An early important contribution towards …
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Adaptive refinement methods for singularly perturbed convection-diffusion problems
Contains fulltext : 145683.pdf (Publisher’s version ) (Open Access)
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On numerical methods for direct and inverse convection-diffusion problems
De thesis bestaat uit 3 delen. In het eerste deel komen oplossingsmethoden van “directe” of “voorwaartse” randwaardeproblemen aan bod. In hoofdstuk 2 wordt een niet-lineair convectie-diffusievraagstuk beschouwd. Dit vraagstuk modeleert de verspreiding van contaminanten in de ondergrond ten gevolge …
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Moving Mesh Finite Element Method for Time Dependent Convection-Diffusion Problems
… This is especially true for singularly perturbed convection-diffusion problems. In the presence of vanishing molecular diffusivity, MM- FEM may not suffice. The numerical method may exhibit under-diffusive properties and other methods need to be integrated into the classic Galerkin formulation. We …
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Efficient reduced-basis approximation of scalar nonlinear time-dependent convection-diffusion problems, and extension to compressible flow problems
… method is applied to nonlinear time-dependent convection-diffusion parameterized partial differential equations (PDEs). A proper orthogonal decomposition (POD) procedure is used for the construction of reduced-basis approximation for the field variables. In the presence of highly nonlinear …
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A Nodal Approach to Arbitrary Geometries, and Adaptive Mesh Refinement for the Nodal Method
… Application of this modified implementation to convection-diffusion problems proves that the coarse mesh efficiency of the nodal method can be maintained by taking advantage of ""off the shelf"" advanced solver technology."
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High Resolution Time-Limiter Schemes for Conservation Laws
… may generate strong oscillations in non-smooth problems. The new Limited-DIRK3 scheme (L-DIRK3) is proposed. For convenience of applications to systems of equations, we also propose a new and convenient construction of time-limiter, which allows an arbitrary choice of reference quantity with …
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Unstructured Nodal Discontinuous Galerkin Method for Convection-Diffusion Equations Applied to Neutral Fluids and Plasmas
… the DG method has been extensively applied to convection-diffusion problems. In this dissertation, a numerical package, texttt{PHORCE}, is introduced to solve a number of convection-diffusion problems in neutral fluids and plasmas. Unstructured grids are used in order to randomize grid errors, …
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Implicit-explicit methods for time-dependent PDE’s
… partial differential equations. For problems with terms of different types, implicit-explicit (IMEX) schemes have been used, especially in conjunction with spectral methods. For convection-diffusion problems, for example, one would use an explicit scheme for the convection term and an …
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Speeding up high-order algorithms in computational fluid and kinetic dynamics: based on characteristics tracing and low-rank structures
… finite volume (EL-RK-FV) method for solving convection and convection-diffusion problems. Eulerian-Lagrangian and semi-Lagrangian methods have become popular ways to solve hyperbolic conservation laws due to their ability to allow large time-stepping sizes. The proposed scheme is formulated …
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Defektkorrekturverfahren für singulär gestörte Randwertaufgaben
… zweidimensionale singulär gestörte Konvektions-Diffusions-Probleme auf einer Klasse von Shishkin-Typ-Gittern. Im eindimensionalen Fall wird nachgewiesen, dass das Verfahren von (fast) zweiter Ordnung, gleichmäßig bezüglich des Diffusionsparameters $\epsilon$ konvergiert. Zur Konvergenzanalyse …