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Eigenvalue analysis...
Eigenvalue analysis for summation-by-parts finite difference time discretizations
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- Ruggiu, Andrea Alessandro (författare)
- Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten
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- Nordström, Jan, 1953- (författare)
- Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten
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(creator_code:org_t)
- Linköping : Linköping University Electronic Press, 2019
- Engelska 35 s.
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Serie: LiTH-MAT-R, 0348-2960 ; 2019:9
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Abstract
Ämnesord
Stäng
- Diagonal norm finite-difference based time integration methods in summation-by-parts form are investigated. The second, fourth and sixth order accurate discretizations are proven to have eigenvalues with strictly positive real parts. This leads to provably invertible fully-discrete approximations of initial boundary value problems.Our findings also allow us to conclude that the second, fourth and sixth order time discretizations are stiffly accurate, strongly S-stable and dissipatively stable Runge-Kutta methods. The procedure outlined in this article can be extended to even higher order summation-by-parts approximations with repeating stencil.
Ämnesord
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
Nyckelord
- Time integration
- Initial value problem
- Summation-by-parts operators
- Finite difference methods
- Eigenvalue problem
Publikations- och innehållstyp
- vet (ämneskategori)
- rap (ämneskategori)