[Mesa-users] ppisn problem for version r15140

[Rob Farmer]

Okay, so we need more information to be able to help you.

What's limiting your timestep? Have you tried changing some timestep
controls to see if that helps?
What is your star doing at this point in time? It is stuck during a pulse?
During the relaxation process after a pulse? Between pulses?  This is where
making plots to see what the star is doing can help you.

Rob



On Thu, 11 Feb 2021 at 09:27, Jing-Ze Ma via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Thanks Jeremy.
>
> Yes. Apologies for the ambiguity.
>
> The time-step is going to zero, but doesn't reach the lower limit
> 1d-20 seconds.
>
> For most cases log dt falls to about -10 and the star doesn't evolve
> after that. All the parameters on the terminal change very little so
> I think it may be a lost cause. I just put a stop to it after running
> a day on 4 cores.
>
> -----Original Messages-----
> *From:*"Jeremy Sakstein" <sakstein at hawaii.edu>
> *Sent Time:*2021-02-11 15:00:14 (Thursday)
> *To:* "马竟泽" <mjz18 at mails.tsinghua.edu.cn>
> *Cc:* mesa-users <mesa-users at lists.mesastar.org>
> *Subject:* Re: Re: [Mesa-users] ppisn problem for version r15140
>
> Thanks,
>
> Can you also enlighten us as what you mean by "fails to converge"?
>
> Is the time-step going to zero?
>
> On Wed, Feb 10, 2021 at 5:37 PM 马竟泽 <mjz18 at mails.tsinghua.edu.cn> wrote:
>
>> Hi Jeremy,
>>
>> Here are my inlist_ppisn, inlist_extra and run_star_extras files.
>>
>> Also, am I keeping this conversation inside the list?
>> I'm still figuring our how to use the mailing list.
>>
>> Thanks.
>>
>> Best regards,
>>
>> Jing-Ze
>>
>>
>>
>> -----Original Messages-----
>> *From:*"Jeremy Sakstein" <sakstein at hawaii.edu>
>> *Sent Time:*2021-02-11 09:29:09 (Thursday)
>> *To:* "马竟泽" <mjz18 at mails.tsinghua.edu.cn>
>> *Cc:* mesa-users <mesa-users at lists.mesastar.org>
>> *Subject:* Re: [Mesa-users] ppisn problem for version r15140
>>
>> Hi Jing-Ze,
>>
>> It is likely you are having a different problem to me, since the problem
>> I had was specific to objects with masses <40ish, and low metallicities.
>>
>> If you send me your inlist and run_star_extras I can have a look for you
>> if you like?
>>
>> I spent some time looking at the masses you describe in r-15140 so I may
>> be able to help.
>>
>> Cheers,
>>
>> Jeremy
>>
>> On Wed, Feb 10, 2021 at 3:24 PM 马竟泽 via Mesa-users <
>> mesa-users at lists.mesastar.org> wrote:
>>
>>> Hi everyone,
>>>
>>> I'm trying to run the template_ST (Merchant & Moriya 2020 A&A)
>>> with a few modications from test_suite ppisn so that it can
>>> start to run in r15140.
>>>
>>> I've tried initial masses of 70, 80, 90, 100, 130 solar masses
>>> without rotation. So far only the 100 solar mass case evolved
>>> to its termination condition and reached a PISN. The rest just
>>> failed to converge.
>>>
>>> I've noticed a similar question "Question about (relatively) low
>>> mass stars in the PPISN test suit" posted by Jeremy Sakstein. It
>>> seems that Jeremy has found the way for ppisn to work in r15140.
>>> But I only joined the mailing list yesterday, so I can't seem to
>>> open the run_star_extras and inlist files attached to that mail.
>>> I'd appreciate it if someone could re-send me those files or give
>>> some suggestions.
>>>
>>> Thanks a lot!
>>>
>>>
>>> --
>>> Jing-Ze Ma
>>> Undergraduate Student,
>>> Tsien Excellence in Engineering Program (TEEP) 2018,
>>> School of Aerospace Engineering,
>>> Tsinghua University
>>>
>>> _______________________________________________
>>> mesa-users at lists.mesastar.org
>>> https://lists.mesastar.org/mailman/listinfo/mesa-users
>>>
>>>
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