[Mesa-users] mtransfer_rate stuck while using other_rlo_mdot

[Surjakanta Kundu]

Thank You so much for your reply. I found a limit on explicit_abs_mdot,
which is 1e-7 Msun/yr by default. One needs to increase it to some higher
value by adding a line in binary_controls:

max_explicit_abs_mdot = desired value in Msun/yr.

I increased my limit, and it's working perfectly. Thank you again for your
help.

Best,
Surjakanta.


On Wed, Jul 5, 2023 at 10:27 AM Ebraheem Farag <ekfarag at asu.edu> wrote:

> Hello Surjakanta,
>
> > My mass transfer rates or mdots are calculated in units of Msun/yr.
> Therefore, I multiply my mdots with a constant Msun/secyer to convert them
> into g/s.
>
> This seems correct.
>
> > However, when I do so, the mtransfer_rate gets stuck at 1e-7 Msun/yr.
>
> Are your timesteps any different between both of your runs? Could your
> 1e-7Msun/yr model be evolving with very small timesteps? What is
> controlling the timesteps in your terminal output (e.g. varcontrol, max_dt,
> retry, hold, max increase, max decrease, delta_lgrho)?
>
> -EbF
>
> On Tue, Jul 4, 2023 at 7:22 PM Surjakanta Kundu via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Hi everyone!
>>
>> I have been trying to use modified Mass Transfer rates in a binary system
>> by using the "other_rlo_mdot" hook. My mass transfer rates or mdots are
>> calculated in units of Msun/yr. Therefore, I multiply my mdots with a
>> constant Msun/secyer to convert them into g/s. However, when I do so, the
>> mtransfer_rate gets stuck at 1e-7 Msun/yr.
>>
>> Also, if I do not multiply the constant Msun/secyer, mtransfer_rate gets
>> updated without problems. Since mtransfer_rate has to be in units of g/s, I
>> do have to multiply the constant factor.
>>
>> Is there any limit on mtransfer_rate that restricts it to 1e-7 Msun/yr?
>> How do I feed my mdots into mtransfer_rate in units of g/s?
>>
>> Thank You so much!
>>
>> Best,
>> Surjakanta.
>> _______________________________________________
>> mesa-users at lists.mesastar.org
>>
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>>
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