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- Newsgroups: sci.math.num-analysis
- Path: sparky!uunet!mcsun!sun4nl!ruuinf!ruunfs.fys.ruu.nl!walsteyn
- From: walsteyn@fys.ruu.nl (Fred Walsteijn)
- Subject: need references for Runge-Kutta versus Multi-step ...
- Message-ID: <1993Jan25.180439.26879@fys.ruu.nl>
- Summary: where are the methods compared thoroughly ?
- Keywords: Runge, Kutta, multistep, efficiency, ODE, PDE
- Organization: Physics Department, University of Utrecht, The Netherlands
- Date: Mon, 25 Jan 1993 18:04:39 GMT
- Lines: 45
-
- Dear colleagues,
-
- I am looking for some recent references comparing
- the efficiencies of Runge-Kutta and Multistep methods.
-
- My main interest is in the field of time-dependent
- pseudo-hyperbolic PDEs describing advection/convection
- dominated flows (i.e. diffusion/viscosity very small).
- If these PDEs are discretized in space with for example
- a finite element method, then a system of ODEs results
- which can be solved with either a Runge-Kutta scheme or
- a Multistep scheme.
-
- Can you give me some references where the efficiencies
- of those schemes are compared thoroughly ?
- (Preferably for high spatial resolutions, i.e. very large
- systems of ODEs.)
-
- Please don't give a statement such as ``Runge-Kutta schemes
- are too expensive'' without giving a good reference which
- proves it. In fact, section 3.7 of the book:
-
- E. Hairer, S.P. Norsett, G. Wanner,
- Solving Ordinary Differential Equations I,
- Sringer Verlag, Berlin, 1987
-
- seems to indicate that accurate Runge-Kutta schemes
- (such as DOPRI-8) may outperform variable order/stepsize
- Multistep schemes for a lot of problems. Hairer et al apply
- both families of schemes to small systems of ODEs as well as
- a ``large'' system of ODEs resulting from space-discretization
- of a reaction-diffusion problem.
-
- Is DOPRI-8 also more efficient for advection dominated flows ???
-
- I also find Table 7.1 of Hairer et al interesting. It compares
- the storage required for Runge-Kutta and Multistep methods.
- The surprising conclusion is that DOPRI-8 is most economical...
- Any comments on that ?
-
- Thank you & greetings,
- -----------------------------------------------------------------------------
- Fred Walsteijn | Internet: walsteyn@fys.ruu.nl
- Institute for Marine and Atmospheric Research | FAX: 31-30-543163
- Utrecht University, The Netherlands | Phone: 31-30-533169
-