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A dynamic multiscale viscosity algorithm for shock capturing in Runge Kutta Discontinuous Galerkin methods

Author(s)
Brachet, Jean-Baptiste
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Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
Advisor
Jamie Peraire.
Terms of use
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
In order to improve the performance of higher-order Discontinuous Galerkin finite element solvers, a shock capturing procedure has been developed for hyperbolic equations. The Dynamic Multiscale Viscosity method, originally presented by Oberai and Wanderer [8, 9] in a Fourier Galerkin context, is adapted to the Discontinuous Galerkin discretization. The notions of diffusive model term, artificial viscosities, and the Germano identity are introduced. A general technique for the evaluation of the multiscale model term's parameters is then presented. This technique is used to perform efficient shock capturing on an one-dimensional stationary Burgers' equation with 1-parameter and 2-parameter model terms. Corresponding numerical results are shown.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.
 
Includes bibliographical references (p. 69-70).
 
Date issued
2005
URI
http://hdl.handle.net/1721.1/32441
Department
Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
Publisher
Massachusetts Institute of Technology
Keywords
Aeronautics and Astronautics.

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  • Aeronautics and Astronautics - Master's degree

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