[mesa-users] Trouble relaxing composition

[Josiah Schwab]

Hi Ken,

> The issue is that the run relaxes to a composition that is not what I've
> specified.  In particular, the inner 98% or so should be nearly pure 4He,
> but instead relaxes to exactly 50/50 4He/28Si.  Similar issues occur with
> other compositions I've tried; in one of them, the inner region relaxed to
> exactly 1/3 each of C/O/Si instead of 50/50 C/O.  Any insight out there?

Pretty sure that your composition file is backwards.  That is, the first
column (xq) should be monotonically increasing.

If I reverse the lines (i.e., select region, M-x reverse-region), I get
the the attached abundance profile.

Josiah

P.S.  Also, you should probably have a point at xq = 1.0.

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