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An adaptive‐order discontinuous Galerkin method for the solution of the Euler equations of gas dynamics
Author(s) -
Baumann Carlos Erik,
Tinsley Oden J.
Publication year - 2000
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/(sici)1097-0207(20000110/30)47:1/3<61::aid-nme761>3.0.co;2-d
Subject(s) - discontinuous galerkin method , mathematics , solver , euler equations , convergence (economics) , galerkin method , compact space , boundary value problem , conservation law , mathematical analysis , domain (mathematical analysis) , jump , boundary (topology) , finite element method , mathematical optimization , physics , economics , thermodynamics , quantum mechanics , economic growth
We present an adaptive‐order discontinuous Galerkin technique that produces a compact, higher‐order‐accurate, and stable solver. The method involves a weak approximation of the conservation equations and a weak imposition of the Rankine–Hugoniot jump conditions across interelement and domain boundaries. This discontinuous Galerkin approximation is conservative and permits the use of different polynomial order in each subdomain according to the local smoothness of the solution. Moreover, the compactness of the formulation makes possible a consistent and accurate implementation of boundary conditions. Analytical studies of stability and numerical solutions of representative two‐ and three‐dimen‐ sional problems suggest that the method is robust and capable of delivering high rates of convergence. Copyright © 2000 John Wiley & Sons, Ltd.