[Mesa-users] KH Timescale error

[Francis Timmes]

hi zabana,

it appears you are plotting the desired quantities outside of mesa, 
so the data must be in your profile*.data files. you might want to 
inspect more carefully at the contents of those profile files.
for example,

% less -S profile1.data

fxt






> On Apr 17, 2018, at 3:13 PM, mag 254 via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> 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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