[mesa-users] mixing_type in history_columns and set_do_mb are different

[Pablo Marchant]

Jiakun, there are effective differences on what is in s% mixing_type(k) and
whats written to the history.data file. This is because you can only write
a limited amount of mixing regions, so (if I remember correctly) for
output the code disregards regions with convective or overshooting mixing
below a certain D_mix threshold, plus an extra thing I don't remember
precisely (check this discussion I had with Bill if you need more details
http://sourceforge.net/mailarchive/message.php?msg_id=30844108)

But anyways, the relevant features should be there, such as large
convective cores or envelopes.

Also, s% nz IS NOT the total number of mixing zones, it represents all
zones with which the star is resolved. So in every case, s% nz should be
significantly larger than the number of different mixing regions. If in
doubt of any parameter, check on mesa/star/public/star_data.inc, in
particular you have for nz:

! the number of zones in the model
integer :: nz, nz_old, nz_older

Cheers!

On Thu, Jun 6, 2013 at 10:22 AM, jiakun1219 <jiakun1219 at 163.com> wrote:

> Very sorry for my poor expression.
> I means when write out the mixing_type of each zone number (s% mixing_type(k)) in subroutine set_do_mb (rlo_routines.inc) ,then compare it with the same mixing_type in profile.data, and I find they are different, even the total zone number is also different.So I'm strange about the different, and I wonder which one is reliable.
>
> Thank you very much again!
>
>
> At 2013-06-06 15:52:22,"Pablo Marchant" <pamarca at gmail.com> wrote:
>
> Sorry, guess I confused the set_do_mb subroutine with
> the okay_to_do_magnetic_braking parameter. Are you saying that you write
> out the "have_radiative_core" variable in the subroutine do_mb and it
> doesn't match what you see in the mixing_regions?
>
> On Thu, Jun 6, 2013 at 9:42 AM, Pablo Marchant <pamarca at gmail.com> wrote:
>
>> Jiakun, do you mean that the mixing regions turn out different if you
>> choose do_mb = .true. or do_mb = .false.? Those are two different physical
>> situations, and if the star interacts with the companion or not depending
>> on the presence of magnetic braking you will get very different results.
>> Even before they interact you could get some very minor differences, as
>> timesteps are also controlled depending on how the orbital angular momentum
>> evolves.
>>
>> If there are differences you get right from the beggining, with every
>> other parameter being the same, then there you would have something strange
>> going on.
>>
>> Cheers!
>>
>>  On Thu, Jun 6, 2013 at 5:30 AM, jiakun1219 <jiakun1219 at 163.com> wrote:
>>
>>>   Hey everyone,
>>>
>>> When to consider the magnetic braking in LMXB evolution, I write out the mixing_type in history_columns and in subroutine set_do_mb (rlo_routines.inc) respectively, and I find it have different types of mixing_type between history_columns and set_do_mb, and also the total zone number (s% nz) is different.
>>>
>>>
>>> So why the differences ? And which one should be reliable to choose?
>>> Thank you very much!
>>> jiakun
>>>
>>>
>>>
>>>
>>>
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>>
>>
>> --
>> Pablo Marchant Campos
>> M.Sc on Astrophysics, Universidad Católica de Chile
>> PhD student, Argelander-Institut für Astronomie
>>
>
>
>
> --
> Pablo Marchant Campos
> M.Sc on Astrophysics, Universidad Católica de Chile
> PhD student, Argelander-Institut für Astronomie
>
>
>
>


-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie
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