[mesa-users] Diffusion in example_astero test case

[Kuldeep Verma]

Hello Everyone,

I included diffusion of elements during the evolution while doing
asteroseismology. I did it by copying the diffusion parameters from the
solar calibration test case, and it worked fine in the past. Recently, I
found a very strange behavior at the evolutionary stage where model becomes
good enough (chi2_radial < chi2_radial_limit) to calculate the non-radial
oscillation frequencies.

At this stage if evolved without diffusion, the model gets one step back
and starts evolution with smaller time step, and eventually reaches to
small enough chi2_radial to calculate non-radial oscillation frequencies
and the total chi2. However when I include diffusion, the chi2_radial shoot
up to a very high value after going one step back and never reaches to
small enough chi2_radial to calculate the non-radial oscillation
frequencies.

I'm using MESA version 6794 with MESASDK. I have attached the insists
required to reproduce the results with the email. You have to just
overwrite the inlists in the test case example_astero with the attached
insists. Evolve the star twice, with and without diffusion. Thanks a lot in
advance for any help.

With Best Wishes,
Kuldeep
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20141011/158ad2ce/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: inlist_3
Type: application/octet-stream
Size: 9804 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20141011/158ad2ce/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: inlist_astero_search_controls
Type: application/octet-stream
Size: 36270 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20141011/158ad2ce/attachment-0001.obj>