[mesa-users] Gradually turning off diffusion?

[Aaron Dotter]

Hi Earl,

How about using run_star_extras?  If you're willing to add some code to
extras_finish_step, you can change this array:

         !### diffusion_class_factor(:)

         ! Arbitrarily enhance or inhibit diffusion effects by class.

      diffusion_class_factor(:) = 1d0

Change it gradually from 1 to 0 over a number of timesteps and then, when
it gets to zero, you can set do_element_diffusion = .false.


Aaron


On Thu, Jan 12, 2017 at 2:28 PM, Earl Bellinger <bellinger at mps.mpg.de>
wrote:

> Hello mesa-users,
>
> I want element diffusion on the main sequence but not past that point.
> However, switching between an inlist with diffusion and one without
> causes a big jump in the HR diagram. Does anyone have any advice as to
> how one should go about turning it off more gradually?
>
> Best regards,
> Earl Bellinger
>
> ---
> www.earlbellinger.com
> Department of Astronomy, Yale University
> Stellar Ages & Galactic Evolution Group, Max Planck Institute
>
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