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SIAM J. Numer. Anal. 49, pp. 2618-2639 (22 pages)
Strong Stability Preserving Two-step Runge–Kutta Methods
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Add to FacebookWe investigate the strong stability preserving (SSP) property of two-step Runge–Kutta (TSRK) methods. We prove that all SSP TSRK methods belong to a particularly simple subclass of TSRK methods, in which stages from the previous step are not used. We derive simple order conditions for this subclass. Whereas explicit SSP Runge–Kutta methods have order at most four, we prove that explicit SSP TSRK methods have order at most eight. We present explicit TSRK methods of up to eighth order that were found by numerical search. These methods have larger SSP coefficients than any known methods of the same order of accuracy and may be implemented in a form with relatively modest storage requirements. The usefulness of the TSRK methods is demonstrated through numerical examples, including integration of very high order weighted essentially non-oscillatory discretizations.
© 2011 Society for Industrial and Applied Mathematics
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Received September 23, 2010
Accepted September 26, 2011
Published online December 22, 2011
Accepted September 26, 2011
Published online December 22, 2011
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