[mesa-users] Diffusion coefficient

[Masanobu Kunitomo]

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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