[mesa-users] Diffusion in example_astero test case

[Kuldeep Verma]

Hi Bill,

Thanks for the quick reply. I tried fresh checkout of pre-released version
7137, but got the following error message:

svn: E000060: Unable to connect to a repository at URL 'svn://
svn.code.sf.net/p/mesa/code/trunk'
svn: E000060: Can't connect to host 'svn.code.sf.net': Operation timed out

Is the svn server down?

With Best Wishes,
Kuldeep

On Sun, Oct 12, 2014 at 2:32 AM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:

> Hi Kuldeep,
>
> I can't reproduce your problem with my current (about to be released)
> version.   Would you please get a pre-release version -- 7137 -- and try it
> for me.
>
> Here's the output I get when I edit your inlist to turn diffusion on.
>
>                    chi2_radial > chi2_radial_limit  1339          133.44
>        100.00
>                             failed to find all required l=0 modes  1339
>                    chi2_radial > chi2_radial_limit  1340          114.54
>        100.00
>                             failed to find all required l=0 modes  1340
>                          chi^2 total, chi^2 radial  1341          119.08
>         99.92
>                          chi^2 total, chi^2 radial  1342          108.15
>         91.18
>                          chi^2 total, chi^2 radial  1343           97.55
>         83.87
>                          chi^2 total, chi^2 radial  1344           89.43
>         79.83
>                          chi^2 total, chi^2 radial  1345           84.59
>         79.59
>                          chi^2 total, chi^2 radial  1346           83.87
>         84.96
>                          chi^2 total, chi^2 radial  1347           84.87
>         90.37
>                          chi^2 total, chi^2 radial  1348           88.02
>         98.21
>                    chi2_radial > chi2_radial_limit  1349          109.96
>        100.00
>                             failed to find all required l=0 modes  1349
>                    chi2_radial > chi2_radial_limit  1350          128.57
>        100.00
>                             failed to find all required l=0 modes  1350
> save photos/x350 for model 1350
>                    chi2_radial > chi2_radial_limit  1351          148.01
>        100.00
>                             failed to find all required l=0 modes  1351
>                    chi2_radial > chi2_radial_limit  1352          175.68
>        100.00
>                             failed to find all required l=0 modes  1352
>  have reached too many bad chi2 limit
>
>
> Thanks,
> Bill
>
>
>
>
> On Oct 11, 2014, at 2:56 AM, Kuldeep Verma wrote:
>
> 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
>
>
> <inlist_3><inlist_astero_search_controls>
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