Energy Stability of Explicit Runge--Kutta Methods for Nonautonomous or Nonlinear Problems

Hendrik Ranocha, David I. Ketcheson

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Many important initial value problems have the property that energy is nonincreasing in time. Energy stable methods, also referred to as strongly stable methods, guarantee the same property discretely. We investigate requirements for conditional energy stability of explicit Runge--Kutta methods for nonlinear or nonautonomous problems. We provide both necessary and sufficient conditions for energy stability over these classes of problems. Examples of conditionally energy stable schemes are constructed, and an example is given in which unconditional energy stability is obtained with an explicit scheme.
Original languageEnglish (US)
Pages (from-to)3382-3405
Number of pages24
JournalSIAM Journal on Numerical Analysis
Volume58
Issue number6
DOIs
StatePublished - Nov 24 2020

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