[CIG-LONG] TimeStep

[Brian Wilson]

Oh ok thanks. Is there any way to change the absolute timestep? I'd like my
simulation to go beyond 1.5 time units. I suppose that could lead to a loss
of accuracy, but currently the timestep is diminishing to 0.

Brian

On Wed, Nov 17, 2010 at 12:21 PM, Walter Landry <walter at geodynamics.org>wrote:

> Brian Wilson <bjwilson83 at gmail.com> wrote:
> > Hi Walter,
> >
> > I've been having trouble getting dt to change the time step correctly. I
> set
> > dt to 1 but I get the following time steps:
> >
> > TimeStep = 0, Time = 0
> > TimeStep = 1, Time = .739729
>
> Setting "dt" only sets the timescale for the mechanical Stokes flow.
> Gale also computes a timestep from the diffusion and advection terms
> of the Energy equation.  If those timesteps are smaller than what you
> set for the mechanical Stokes flow, then Gale uses those.
>
> Ideally, Gale should use "dt" for both the Energy and Stokes flow
> equations, but at present it does not.
>
> Cheers,
> Walter Landry
> walter at geodynamics.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://geodynamics.org/pipermail/cig-long/attachments/20101117/8dd6e5c4/attachment.htm