[mesa-users] quastion

[Robert FARMER]

Hi
So you dont need to change the intital_mass in the inlist file its just a
copy of the others (see the ./rn script, it first copies the inlist_prepare
to inlist then runs mesa then copies the inlist_make to inlist and runs
mesa) Also you don't need to change the initial mass in the inlist_make
file as that loads mesa model made from the inlist_prepare run so it
doesn't care what the initial mass is.

I can confirm running at initial_mass=6 the run doesn't finish, convergence
problems can happen with any problem, you'll need to see what parameters
from the inlists your problem is sensitive to.

 A possible fix for this is to try playing with the  varcontrol_target,
mesh_delta_coeff controls which control the model resolution, increasing
the resolution and rerunning may fix the issue for you. though increasing
the resolution can make the problem take longer to run which is why there
not set to a high value to start with.

Rob


On Mon, Dec 1, 2014 at 12:04 AM, sanaz <sanaz.lotfiani at gmail.com> wrote:

>
>
>
> Dear Robert
>
>
> I hope you are fine.I intend to know about co core mass in the white dwraf
>  ratio mass of star in main sequence,
> So when I ran program of "make_co_wd " for 3M and 4M , the runing is
> completed, in this program I change mass
> 1_inlist
>  'initial_mass =6' I reduce to initial_mass=3,4 respectively.
> 2_’inlist_make_co_wd
> initial_mass=6' I reduce to initial_mass=3,4 respectively.
> 3_’inlist_prepare_to_make_co_wd’
> initial_mass=3.25 I change it to 3,4M respectively.
>
> But when I intent to run 5,6M I get error!
>
>
>  stopping because of convergence problems -- too many retries
>
>
> terminated evolution: hydro_failed_to_converge
>
> termination code: max_number_retries
> Mon Dec  1 00:10:22 IRST 2014
>
> ******************************************************************
> failed to create final.mod when running inlist_make_co_wd
> ******************************************************************
>
> So I change the code of 'the max_number_retries = 500’ and reduce to '
> max_number_retries = 100’ in three list’1-
> inlist,2-inlist_make_co_wd,3-inlist_prepare_to_make_co_wd’
> But I get the same error again.
>
> When I don’t change 'initial_mass=3.25’ in the
> ‘inlist_prepare_to_make_co_wd’ and change ‘initial_mass=6’ to
> ‘initial_mass=5,6’ respectively in the inlist and in the inlist_co_wd I
> don’t get this problem and error,and running is completed but I don’t know
> Why I can’t change mass in the ‘inlist_prepare_to_make_co_wd’ to the 5 or
> 6 solar mass . and in this situation do I get correct results?
>
> Bests
>
> Sanaz
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20141201/ceaae345/attachment.html>