[mesa-users] Diffusion coefficient

[Pablo Marchant]

You should just set mix_factor = 1d-2 in your inlist. If you only have
convection I can imagine not much happens unless you use a much stronger
reduction, as convection is extremely fast.
Am 18.06.2015 4:28 nachm. schrieb "Masanobu Kunitomo" <
kunitomo.masanobu at c.mbox.nagoya-u.ac.jp>:

> Dear all,
>
> I am trying a test with the artificially decreased diffusion coefficient.
> Although I know it is possible with the “mix_factor” in controls, I did not
> understand how this works.
>
> Instead of “mix_factor”, I tried a test with the modified “mlt.f” in the
> directory mesa/mlt/private. In the case of 100 times decreased diffusion
> coefficient, I multiplied a factor of 1d-2 as below:
> D = conv_vel*Lambda/3  *1d-2
> However, the calculated evolution was not changed.
>
> Thus, today I would like to ask (1) whether it is possible to artificially
> change the diffusion coefficient in the file “mlt.f" or not and (2) how
> “mix_factor” works.
>
> I am using version 6596 and I attached my mlt.f. Rotation has not been
> considered in our calculation. Thanks in advance for your any help!
>
> Sincerely,
> Masanobu Kunitomo
>
> --
> Masanobu Kunitomo, Ph.D.
> Laboratory for Theoretical Astronomy & Astrophysics (TA-Lab)
> Department of Physics, Nagoya University
> Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan 464-8602
> Email: kunitomo.masanobu at c.mbox.nagoya-u.ac.jp
>
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