[Mesa-users] mtransfer_rate stuck while using other_rlo_mdot

[Ebraheem Farag]

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.
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