[Mesa-users] KH Timescale error

[mag 254]

Thank you Francis, it workrs, i was able to obtain dynamical and KH
timescales with this two commands on the history.txt

I was also wondering if we can get from MESA the mass fraction of  H,He
.... (Xc)  and the temperature gradient which is (dlnT/dlnP)  as shown in
the two figures.

THanks
zabana

2018-04-17 17:25 GMT-04:00 mag 254 <zabanaibiza at gmail.com>:

> Thank you Francis, it workrs, i was able to obtain dynamical and KH
> timescales with this two commands on the history.txt
>
> I was also wondering if we can get from MESA the mass fraction of  H,He
> .... (Xc)  and the temperature gradient which is (dlnT/dlnP)  as shown in
> the two figures.
>
> THanks
> zabana
>
> 2018-04-16 19:48 GMT-04:00 Francis Timmes <fxt44 at mac.com>:
>
>> hi zabada,
>>
>> in r01398 and the past few public releases, in
>> star/defaults/history_columns.list one can find
>> a section that begins
>>
>> !# timescales
>>
>>       !dynamic_timescale ! dynamic timescale (seconds) -- estimated by
>> 2*pi*sqrt(r^3/(G*m))
>>       !kh_timescale ! kelvin-helmholtz timescale (years)
>>
>> i checked that when uncommented, these quantities
>> appear in the header of profile*.data file.
>>
>> fxt
>>
>>
>>
>>
>> > On Apr 16, 2018, at 5:28 PM, mag 254 <zabanaibiza at gmail.com> wrote:
>> >
>> > Thanks to all of you Pablo, Francis and Evan.
>> >
>> > I did not find this timescales for the history column list but Evan's
>> Suggestion gave me what i want
>> >
>> >
>> > Thank you
>> > Zabada
>> >
>> > 2018-04-16 17:04 GMT-04:00 Evan Bauer <ebauer at physics.ucsb.edu>:
>> > It’s possible that you could also be interested in this:
>> > thermal_time_to_surface ! in seconds
>> >
>> > which is a local quantity available in profile_columns.list
>> >
>> > Evan
>> >
>> > > On Apr 16, 2018, at 1:58 PM, Francis Timmes via Mesa-users <
>> mesa-users at lists.mesastar.org> wrote:
>> > >
>> > > hi zabana,
>> > >
>> > > kh_timescale
>> > > dynamic_timescale
>> > > nuc_timescale
>> > >
>> > > remain valid for a history file - unless i’m missing something.
>> > > these global values may be more useful to you than a profile.
>> > >
>> > > fxt
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >> On Apr 16, 2018, at 2:39 PM, Pablo Marchant via Mesa-users <
>> mesa-users at lists.mesastar.org> wrote:
>> > >>
>> > >> Hi Zabana,
>> > >>
>> > >> those output options are no longer in MESA, although they have
>> persisted commented in the defaults file. I'd recommend you compute them
>> directly by yourself in run_star_extras.
>> > >>
>> > >> Cheers
>> > >>
>> > >> On Mon, Apr 16, 2018 at 1:23 PM, mag 254 via Mesa-users <
>> mesa-users at lists.mesastar.org> wrote:
>> > >>
>> > >> Hello all:
>> > >>
>> > >> I am using mesa-r10108 and i am evolving 2Msun. i want to see how
>> the timesclae change KH and dynamical timescales.
>> > >>
>> > >> I uncomment kh timescale on default profile but when i start mesa, i
>> had this error.
>> > >>
>> > >>
>> > >> Any help or suggestion will help me
>> > >>
>> > >> thanks
>> > >> zabana
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>                                          species  mass           8
>>   2.0000000000000000D+00
>> > >>
>> > >>                                        relax_num_steps
>> > >>
>> > >>
>> > >> failed to recognize item for profile columns: dynamic_time
>> > >> failed to recognize item for profile columns: kh_timescale
>> > >> failed to recognize item for profile columns: nuc_timescale
>> > >>
>> > >>                               finished relax_num_steps
>> > >>
>> > >> failed in do_relax_num_steps
>> > >> star_create_pre_ms_model ierr          -1
>> > >> do_load1_star ierr          -1
>> > >> before_evolve_loop ierr          -1
>> > >> DATE: 2018-04-16
>> > >> TIME: 14:16:46
>> > >>
>> > >>
>> > >> _______________________________________________
>> > >> mesa-users at lists.mesastar.org
>> > >> https://lists.mesastar.org/mailman/listinfo/mesa-users
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >> --
>> > >> Pablo Marchant Campos
>> > >> M.Sc on Astrophysics, Universidad Católica de Chile
>> > >> PhD on Astrophysics, Argelander-Institut für Astronomie, Universität
>> Bonn
>> > >> _______________________________________________
>> > >> mesa-users at lists.mesastar.org
>> > >> https://lists.mesastar.org/mailman/listinfo/mesa-users
>> > >>
>> > >
>> > > _______________________________________________
>> > > mesa-users at lists.mesastar.org
>> > > https://lists.mesastar.org/mailman/listinfo/mesa-users
>> > >
>> >
>> >
>>
>>
>
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