From: Tuomo Keskitalo <Tuomo.Keskitalo@iki.fi>
To: Rhys Ulerich <rhys.ulerich@gmail.com>
Cc: Brian Gough <bjg@gnu.org>, gsl-discuss@sourceware.org
Subject: Re: Implementing hybrid explicit/implicit ODE stepper
Date: Thu, 04 Jun 2009 18:52:00 -0000 [thread overview]
Message-ID: <4A28180A.2030103@iki.fi> (raw)
In-Reply-To: <4a00655d0906041040y135755cdlc877ba570c4308da@mail.gmail.com>
On 06/04/2009 08:40 PM, Rhys Ulerich wrote:
> This integrator tends to get used in DNS of Navier-Stokes since the
> memory savings become significant for very large fields.
Ok, now I understand a bit more. I don't think the current GSL
ode-initval is directly suitable for that kind of specialized problem.
The framework does not support separation of f(u) into two components.
You would first have to make changes to gsl_odeiv_system to provide
that, and then modify all the rest accordingly. Might be doable, I don't
know.
Would your application benefit from step size control, or evolution
functionality similar to those in ode-initval? If yes, then you might
try to start from ode-initval and modify it. Otherwise I suggest you
look for how others have designed these kinds of solvers and then create
a new framework suitable for this kind of a problem.
Of course, if you end up implementing only that one stepper, you can use
code snippets from ode-initval for it.
Regards,
Tuomo
--
Tuomo.Keskitalo@iki.fi
http://iki.fi/tuomo.keskitalo
prev parent reply other threads:[~2009-06-04 18:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-03 14:32 Rhys Ulerich
2009-06-04 13:38 ` Brian Gough
2009-06-04 17:20 ` Tuomo Keskitalo
2009-06-04 17:40 ` Rhys Ulerich
2009-06-04 18:52 ` Tuomo Keskitalo [this message]
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