[mesa-users] Convergence issues when simulating massive eruptions by modifying .mod file

[Alexey Zinger]

Hi Josiah,

Thanks for pointing me to the relaxation routines direction! I haven't yet
looked into those. Hopefully, they might get me through some of the
simulations.

Before fiddling with the .mod files I've tried to simulate the eruptions
using the built-in wind schemes with high wind coefficients. There are two
issues with this: first, I'm trying to observe how the star adjusts to a
(nearly) instantaneous mass removal, and all of the wind routines remove
mass gradually. Second, as far as I know, the wind schemes in the code do
not account for the conservation of energy, and this might be important
when so much mass is removed so quickly.

Alexey


On Thu, Apr 18, 2013 at 9:56 AM, Josiah Schwab <jwschwab at berkeley.edu>wrote:

> > I do this by artificially modifying the saved model file and restarting
> the evolution with loading that file.
>
> I tried manipulating model files once and in my experience (and as you
> seem to be finding) that way lies madness :)
>
> Is there something about MESA's built-in routines for changing the mass of
> model that are insufficient/inappropriate for what you want to explore?
>  What other (if any) approaches have you tried?
>
> My personal recommendation is to use an existing relaxation routine or to
> add something you write yourself to run_star_extras.f to do the relaxation.
>  I think it will save you a lot of grief.
>
> Perhaps others will share their experiences.
>
> Josiah
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20130418/d73beaaa/attachment.html>