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Published in: Mathematical Models and Computer Simulations 1/2023

01-02-2023

Implicit-Explicit Bicompact Schemes for Hyperbolic Systems of Conservation Laws

Author: M. D. Bragin

Published in: Mathematical Models and Computer Simulations | Issue 1/2023

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Abstract

High-order bicompact schemes for hyperbolic systems of conservation laws are considered. We aim to significantly speed up these schemes. Implicit-explicit Runge–Kutta methods are proposed for time discretization, instead of the previously used diagonally implicit methods. The global Lax–Friedrichs–Rusanov flux splitting is a premise for the implicit-explicit approximation. It is shown that implicit-explicit bicompact schemes are stable for any ratio of steps in time and space. The accuracy of the new implicit-explicit schemes and the substantial speed-up achieved are demonstrated on multidimensional gas dynamics problems.

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Literature
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2.
go back to reference P.-O. Persson, “High-order LES simulations using implicit-explicit Runge–Kutta schemes,” in Proc. 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition (Orlando, FL, Janu-ary 4–7, 2011), AIAA 2011-684. https://doi.org/10.2514/6.2011-684 P.-O. Persson, “High-order LES simulations using implicit-explicit Runge–Kutta schemes,” in Proc. 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition (Orlando, FL, Janu-ary 4–7, 2011), AIAA 2011-684. https://​doi.​org/​10.​2514/​6.​2011-684
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Metadata
Title
Implicit-Explicit Bicompact Schemes for Hyperbolic Systems of Conservation Laws
Author
M. D. Bragin
Publication date
01-02-2023
Publisher
Pleiades Publishing
Published in
Mathematical Models and Computer Simulations / Issue 1/2023
Print ISSN: 2070-0482
Electronic ISSN: 2070-0490
DOI
https://doi.org/10.1134/S2070048223010064

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