[Mesa-users] KH Timescale error

[Francis Timmes]

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
> > 
> 
>