[Mesa-users] Re3: He star models evolve with high metallicity

[Ebraheem Farag]

Hello 辛文宇(Wenyu),

Nice catch! Try adding 'Pextra_factor = 2' to your inlist and it should run
fine.

-EbF

On Mon, May 8, 2023 at 2:49 AM 辛文宇 <xinwenyu16 at mails.ucas.ac.cn> wrote:

> Hi EbF,
>
>
> Thanks for your suggestions and tests.
> > I pasted your inlists into the test_suite case ppisn and added
> "okay_to_reduce_gradT_excess = .true."  to the inlist_ppisn with:
>
> > initial_mass = 70.00d0
> > initial_Y = 0.99d0
> > initial_Z = 1d-2
>
> > and the model ran with no issues to he_depletion. Hopefully this works
> for you :)
>
> Do you change the value of Zbase?
>
> The default values of initial_Z and Zbase are 1E-3. If I just change
> initial_Z=1E-2, the model can go through well.
>
> But the wind mass loss is determined by Zbase not Z. If Zbase is 1E-2, the
> model may not reach the He ignition.
>
>
> Thanks,
>
> Wenyu
>
>
> -----原始邮件-----
> *发件人:*"Ebraheem Farag" <ekfarag at asu.edu>
> *发送时间:*2023-05-06 09:02:35 (星期六)
> *收件人:* "辛文宇" <xinwenyu16 at mails.ucas.ac.cn>
> *抄送:* "mesa-users at lists.mesastar.org" <mesa-users at lists.mesastar.org>
> *主题:* Re: Re2: [Mesa-users] He star models evolve with high metallicity
>
> Hello 辛文宇(Wenyu),
>
> My bad, I forgot you are not using r22.11.1, it appears that using
> superad_reduction makes the pre-ms have issues converging.
>
> In r15140, how about set "okay_to_reduce_gradT_excess = .true." in
> inlist_to_he_dep or inlist_ppisn, and your model should run fine.
> I pasted your inlists into the test_suite case ppisn and added
> "okay_to_reduce_gradT_excess = .true."  to the inlist_ppisn with:
>
> initial_mass = 70.00d0
> initial_Y = 0.99d0
> initial_Z = 1d-2
>
> and the model ran with no issues to he_depletion. Hopefully this works for
> you :)
>
> -EbF
>
>
> -EbF
>
> On Fri, May 5, 2023 at 5:10 PM 辛文宇 <xinwenyu16 at mails.ucas.ac.cn> wrote:
>
>> Hi EbF,
>>
>>
>> Thanks for your suggestion very much.
>>
>>
>> I use MESA-12778, there is no 'use_superad_reduction = .true.' in this
>> version.
>>
>> I also try 15140 which have 'use_superad_reduction = .true.'.
>>
>> But when I include 'use_superad_reduction = .true.' in inlist_to_he_dep,
>> there are too many retries
>>
>> and stop because:
>>
>>
>> failed in relax_to_radiative_core
>> failed in do_relax_to_radiative_core
>> star_create_pre_ms_model ierr          -1
>> do_load1_star ierr          -1
>> before_evolve_loop ierr
>>
>>
>> More output are shown in 72M.log in detail. Please check, if needed.
>>
>> It seems that the 'ppisn' models in 15140 is different with that in
>> 11532 in some places.
>>
>> Thus, if I use 11532 version, where is no 'use_superad_reduction = .true.
>> '
>>
>> How to solve this problem.
>>
>> Thanks,
>>
>> Wenyu
>>
>>
>>
>> -----原始邮件-----
>> *发件人:*"Ebraheem Farag" <ekfarag at asu.edu>
>> *发送时间:*2023-05-05 18:18:34 (星期五)
>> *收件人:* "辛文宇" <xinwenyu16 at mails.ucas.ac.cn>
>> *抄送:* "mesa-users at lists.mesastar.org" <mesa-users at lists.mesastar.org>
>> *主题:* Re: [Mesa-users] He star models evolve with high metallicity
>>
>> Hello 辛文宇 (Wenyu),
>>
>> Try 'use_superad_reduction = .true.'. You might want to turn this off,
>> after He burning.
>>
>> -EbF
>>
>>
>>
>> On Fri, May 5, 2023 at 2:17 AM 辛文宇 <xinwenyu16 at mails.ucas.ac.cn> wrote:
>>
>>> Hi everyone,
>>>
>>>
>>> I'm trying to evolve the He star models in high metallicity with 'ppisn'
>>> in the test_suite.
>>>
>>> The models can go through with Z=1E-3 well. But when I use Z=0.01 or
>>> 0.02, the timesteps
>>>
>>> become very small after logT reaches 7.5 K (Model Number = 2000). Then
>>> from 2000 to 100000,
>>>
>>> logT increase from 7.5 to 7.6. The inlist file and screenshots are
>>> attached.
>>>
>>>
>>> I am not sure why this model cannot ignite He burning with high
>>> metallicity.
>>>
>>> In order to make this model go through with Z=0.01 or 0.02 well, besides
>>> initial_Z and Zbase,
>>>
>>> which parameters should also be changed ?
>>>
>>>
>>> Thanks very much!
>>>
>>> Wenyu
>>> _______________________________________________
>>> mesa-users at lists.mesastar.org
>>>
>>> https://urldefense.com/v3/__https://lists.mesastar.org/mailman/listinfo/mesa-users__;!!IKRxdwAv5BmarQ!Z9jBtOlGL7QgsTA3kM4ZeQ4OCSfNc2EcTdVrZkREH25ibZCdj-adRA_imfHCZXvkdyp04dcAXHmW8-DginB59P8jiQ$
>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20230508/a69736cf/attachment.htm>