High Order Invariant Domain Preserving Finite Volume Schemes for Nonlinear Hyperbolic Conservation Laws
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Date
2019-05-24
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Abstract
In this dissertation we develop high order invariant domain preserving schemes for general hyperbolic systems. The schemes are based on the general central schemes of formally second, third and fourth order accuracy. The invariant domain property is modified as the quasiconcave constraint and is enforced via a so-called convex limiting technique. There are two classes of schemes developed.
One is based on the invariant domain satisfying nonlinear reconstruction and the other method is made to be invariant domain preserving via the convex flux limiting. The main theoretical results are Theorem 4.3.1 and Theorem 4.3.2. The convex limiting process could sufficiently reduce the oscillations of the numerical solutions at discontinuities like shocks, while it does not deteriorate the order of the underlying central scheme. The numerical performance of the methods is tested on a variety of benchmark problems.
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nonlinear hyperbolic systems, Riemann problem, invariant domain, high-order method, convex limiting, finite volume method, central schemes.