[Mesa-users] Keep the same number of zones during evolution

[Francis Timmes]

i suggest that forcing a low number of fixed cells would usually give misleading or incorrect results.

perhaps the essence of what you're getting at is 

> ... so one could see where off-center helium flashes occur.

best practice is to run the job with several different mass and time resolutions
to see how the location(s) of the he-flash(es) change. what one seeks to show with 
these multiple runs is that the location(s) do not depend greatly on the mass or time resolution. 
that is, one wants to show one's results are converged with respect to the choice of mass and time resolution.

alternatively, since you hint at making 2d plots, such as kippenhahn diagrams,
there is indeed some extra work to be done on the plotting side of the house.
here, one wants to bend the plotting to the science, not bend the science to appease the plotting. 
an example of a plotting tool where such extra work has already been done would be rob farmer's excellent https://github.com/rjfarmer/mesaplot .

ok?

fxt







> On Feb 7, 2021, at 2:24 PM, Richard Battistini <richardbattistini2 at gmail.com> wrote:
> 
> Hello,
> 
> Let's say we would like to plot log_LHe as a function of both time and space, or star age and zone respectively. Perhaps it is easier to do this if the number of zones of every profile file is the same so one could see where off-center helium flashes occur.
> 
> On Sun, Feb 7, 2021 at 4:00 PM Francis Timmes <fxt44 at mac.com> wrote:
> hi richard,
> 
> let's ask why one would want to do that.
> 
> also, in general, 100 cells will vastly under-resolve the mass profiles.
> 
> fxt
> 
> 
> 
> 
> > On Feb 7, 2021, at 1:39 PM, Richard Battistini via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> > 
> > Hello, I am evolving an initial mass=0.81 star in mesa-r10398. Is there an option that keeps the same number of zones (e.g. 100) for every profile file during the evolution of the star, so that the number zones does not change/increase for successive profiles ?
> > 
> > Thanks,
> > Richard Battistini
> > Undergraduate in Physics
> > _______________________________________________
> > mesa-users at lists.mesastar.org
> > https://lists.mesastar.org/mailman/listinfo/mesa-users
> > 
>