[Mesa-users] Convergence problems using other_D_mix with mesa-r15140

[Rob Farmer]

Hi,

Your models are having problems right from the first step. Have you
regenerated your starting model with the  new mesa version or are you
starting with a model made with 10108?

Rob

On Wed, 24 Mar 2021 at 20:29, Arman Aryaeipour via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Dear Mesa-users,
>
> I've recently migrated over to mesa-r15140 from mesa-r10108 for modelling
> nova outbursts.
> In these models, I use the other_D_mix hook routine to implement some
> mixing between the white dwarf and its envelope when the maximum
> temperature reaches 10^8 K. This mixing is initially only around the white
> dwarf and envelope interface, and slowly extends out further into the white
> dwarf and envelope over the course of a few hundred seconds.
>
> When this mixing was carried out using mesa-r10108, the model had no
> problem converging and evolved through the mixing phase I implemented.
> However, with mesa-r15140 the model quickly runs into convergence issues
> after mixing begins and the timestep goes to zero. I've attached the
> terminal_output.txt file which contains MESAs output from when I start
> mixing, with report_solver_progress turned on. I've also provided my
> inlist.
>
> I would be grateful if someone could explain to me what changes in the new
> version of MESA cause the convergence problems once I begin mixing, and
> if there is a way I can change these settings to revert them back to how
> they were in mesa-r10108.
>
> Many thanks in advance!
>
> All the best,
> Arman Aryaeipour
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20210324/7b6e52a3/attachment.htm>