[CIG-LONG] Under resolved cell problem

[Charmaine Thomas]

Hello everyone!

I am currently using Gale to run a 2D long-term extension model using very
low velocities (~2 mm/year) over a ~40 million year time period, and with a
resolution of 135 x 90.
I try to choose a dtFactor such that the amount of time in each timestep is
roughly 100k.
Everything runs smoothly until after only the first or second timestep, when
Gale gives the following disheartening error:

"Something went horribly wrong in _PCDVC_Calculate2D: Problem has an under
resolved cell (Cell Id = 738), check or tune your population control
parameters"

No such error comes about when I leave the dtFactor as 1, so it would seem
the problem is with increasing the dtFactor. Also, if I just use dt the same
error comes about.
Increasing the resolution and number of particles seems to help, but I can
only increase so much before I run out of memory (I am not using compiled
version of Gale), so is this the only solution?

Has anyone come across this error?
If anyone can shed some light that'd be really great!

Cheers,

Charmaine Thomas
M.Sc. Candidate
School of Geosciences | University of Sydney
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