[Mesa-users] PPISN module timestep issues

[Jeremy Sakstein]

Hi,

It looks like you are using the default metallicity so this should run to
completion. I have run this precise inlist (including mesh_delta_coeff =
0.5) in r12778 for the masses you mention a year or so ago.

How long are you giving it and how many resources? The models you mention
undergo many pulsations and, in my experience running on 16 cores with
40GB, can take 2 days+ to complete.

You may want to try turning gold tolerances off to speed up the run.

Cheers,

Jeremy

On Wed, Aug 25, 2021 at 6:27 PM aman awasthi via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hi everyone,
>
> We have been trying to run the PPISN module to get the final BH masses,
> and He depletion mass for initial masses 40-90M in steps of 2M. We have not
> made any changes to the default run_star_extras.f file in the test suite,
> but have made a few changes to the inlist_ppisn file.
> We changed most of the settings to recommended values (except
> mesh_delta_coeff which we set as 0.5). 40-64M ran until Fe core collapse.
> But, 66-90M were very slow to converge and hadn’t even reached He burning
> (as was apparent from the star age and negligible drop in star mass) even
> after >100,000 models.
>
> We then tried implementing some fixes as suggested by some previous mail
> threads. Specifically, we changed the convective overshoot controls and
> max_dq. We also added and removed pre_ms_T_c but to no avail.
>
> We are attaching the inlist_ppisn file and the run_star_extras.f files.
>
> MESA version: r12778
> SDK version: March 25, 2020
> OS: Cluster, 64-bit Linux
>
> Thanks in advance for your help
>
> Thank you
> Aman, Vaishnav, Harshada
> Department  of physics
> IIT Bombay, India
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>

-- 
Jeremy Sakstein (He/Him/His)
Assistant Professor of Theoretical Physics
Department of Physics & Astronomy
University of Hawaiʻi at Mānoa
Watanabe Hall
2505 Correa Road
Honolulu, HI, 96822, USA
http://www.jeremysakstein.com
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