[Users] Negative timesteps with timestep_method="courant_speed" and terminate="time"

[David Radice]

Erik,

thanks for the reply.

On Thu, 2011-03-03 at 09:55 -0500, Erik Schnetter wrote:
> Are you using mesh refinement in these simulations? Carpet's time
> stepping algorithm doesn't support changing the time step size. (It is
> fine if you use unigrid.) If you do, this may explain your symptoms,
> because the different time levels on the different refinement levels
> would become seriously inconsistent.

I am using Carpet, but with unigrid. The timestepping is done with MoL,
RK3.

This issue disappears either by using a terminate condition based on the
number of iterations or by applying that patch. (I checked that
courant_wave_speed > 0).

David

-- 
David Radice
Max Planck Institute for Gravitational Physics
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