[mesa-users] ST

[Martin C.]

Thanks.

Actually I think here prefact should be s% am_nu_factor, not f*s%
am_D_mix_factor







*if (s% am_nu_ST_factor < 0) then    val = safe_log10_cr(prefact*s%
D_ST_factor*if_rot(s% nu_ST,k))else    val = safe_log10_cr(prefact*s%
am_nu_ST_factor*if_rot(s% nu_ST,k))end if*
and in profile_columns.list


*[image: Inline image 1]*
"f" doesn't belong there right?

thx,

Martin

On Wed, Jul 27, 2016 at 9:33 PM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:

> Hi Martin,
>
> I've made the fixes so they'll be in the next release.
> I've also made a small addition to the comments that hopefully will clear
> up the mystery of 'am_D_mix_factor':
>
>          !### am_D_mix_factor
>
>          ! Rotation and mixing of material.
>          ! `D_mix` = diffusion coefficient for mixing of material.
>          ! It is sum of non-rotational and rotational components.
>          ! The rotational part is multiplied by this factor.
>
>
> Thanks,
> Bill
>
>
>
>
> On Jul 27, 2016, at 5:31 PM, Martin C. wrote:
>
> Hi all,
>
> I have trouble with the
> !am_log_nu_ST ! Spruit dynamo effective viscosity
> profiles output when am_nu_ST_factor < 0, in mesa version 8118.
> http://mesa.sourceforge.net/controls_defaults.html#am_nu_ST_factor
>
> <image.png>
>
> So I suggest
>
> if (s% am_nu_ST_factor < 0) then
>     val = safe_log10_cr(prefact*s% D_ST_factor*if_rot(s% nu_ST,k))
> else
>     val = safe_log10_cr(prefact*s% am_nu_ST_factor*if_rot(s% nu_ST,k))
> end if
>
>
> Also, (separate issue)
> should this be D_ST, not nu_ST?
> <image.png>
> http://mesa.sourceforge.net/controls_defaults.html#am_D_mix_factor
>
> BTW what is am in am_D_mix_factor? Angular momentum? What does that have
> to do with D_mix? Sorry if dumb question.
>
> Thanks
>
> Martin
> --
> Martin C.
>
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>
>


-- 
Martin C.
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