[Mesa-users] do_element_diffusion = .false. != diffusion_class_factor(:) = 0

[Evan Bauer]

Hi Earl,

Very interesting question. I’ll have a look.

Cheers,
Evan


> On Dec 14, 2017, at 3:58 AM, Earl Bellinger <bellinger at mps.mpg.de> wrote:
> 
> Dear mesa-users,
> 
> I am wondering if someone can help me to understand why turning off
> element diffusion yields a different result than setting the diffusion
> factor to 0? I would expect, perhaps naively, for them to yield the
> same result.
> 
> Some simple inlists are attached for calculating the first Gyr of
> evolution for a solar mass track. There's a small difference in
> several quantities, for example the effective temperature changes from
> 5643.763 to 5643.913. This is somewhat different from running it with
> diffusion class factor of 1, which gives Teff of 5643.915.
> 
> Best regards,
> Earl Bellinger
> 
> ---
> earlbellinger.github.io
> Earl Bellinger, Ph.D. Candidate
> Stellar Ages & Galactic Evolution Group
> Max Planck Institute for Solar System Research
> <inlist_diff_off><inlist_diff_0><diff_off.data><diff_0.data>