[Mesa-users] Convergence problems for low mass planets

[Rob Farmer]

Hi
Your model is failing due to max_number_retries this option is only really
useful for developers when we are testing the code. Try removing it and
seeing if you model gets further

Rob

On Mon, 29 Apr 2019 at 21:32, Isaac Malsky via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hi everyone,
>
>
> I'm trying to trace back the cause of convergence issues, and I'd greatly
> appreciate any help/advice. I'm running a suite of sub-Neptune mass, highly
> irradiated planets, and having problems evolving planets with ~10%
> envelopes past 5 billion years.
>
>
> The specific model that I'm evolving here:
>
>
> M_p = 22.5 earth mass
>
> Y = .24
>
> Z = .02
>
> core mass fraction = .9
>
> flux = 1d8 erg/cm^2/s
>
> column depth = 1d1 cm^2/g
>
>
> This model fails to evolve for the full 10 billion year evolution.
> However, increasing irradiation_flux by a factor of 10 allows the planet to
> evolve perfectly. The model fails to evolve past ~5.4e9 years, and the
> final hydro_call_number before failure is 212. Also for reference, I'm
> using mesa-r10398.
>
>
> I've included the .mod file to load in, and the inlist to run, as well as
> the terminal output. Also, I've attached the logs generated through the
> debugging outlined in:
>
> http://wmwolf.github.io/projects/mesa_debugging/
>
>
> I'd appreciate any insight about which routine is pushing the timestep so
> low, as I would normally expect models like this to evolve.
>
>
> Thanks for the help!
>
>
> Best,
>
> Isaac
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20190501/cf8f92a8/attachment.html>