[Mesa-users] mtransfer_rate stuck while using other_rlo_mdot

[Ebraheem Farag]

Awesome!

-EbF

On Wed, Jul 5, 2023 at 1:31 PM Surjakanta Kundu <surjakan at ualberta.ca>
wrote:

> 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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