[Mesa-users] Why the results are so mesh-sensitive?

[Warrick Ball]

Interesting!  I haven't experimented with these myself but is it possible 
to summarise?  It looks like two qualitative limits they used that are 
directly related to mass loss are (paraphrased)

     next timestep <= min(t_KH, M/|Mdot|)

and

     dm(near surface) << Mdot*timestep

That is, for the second constraint, you want high spatial resolution in 
the regions being lost, and those directly below.  (For those who haven't 
looked at the paper, Renzo et al. used 500/mesh_delta_coeff points for the 
outermost 0.5 Msun, and Mdot*timestep was always much less than 0.5 Msun.)

Cheers,
Warrick

------------
Warrick Ball
Postdoc, School of Physics and Astronomy
University of Birmingham, Edgbaston, Birmingham B15 2TT
wball at bison.ph.bham.ac.uk
+44 (0)121 414 4552


On Fri, 29 Jun 2018, mesa-users at lists.mesastar.org wrote:

> Hi Matheus,
> 
> It looks like your models are losing a varying amount of mass relatively early on.
> 
> You may find the work of Renzo et al. relevant (especially Appendix B).
> 
> http://adsabs.harvard.edu/abs/2017A%26A...603A.118R
> 
> Hope that helps,
> Josiah
> 
>