[Mesa-users] Convergence issues solved by changing a_mlt

[Joergensen, Johannes Holm]

Hi everyone,


I am having convergence issues in MESA. For context, I am running some "complicated" accreting pre-MS models with the framework developed by Steindl+ 2022. From examining the output of the solver I see that the issues arise in convection zones. By trial and error I solved a lot of my convergence issues by simply changing the mixing length parameter slightly (e.g. from 1.9 to 1.85). My question is: Is there any way to interpret this? My models show interesting interiors with often many tiny convection cells which I imagine are difficult to handle; could a change in a_mlt help in this regard? I would gladly provide figures that showcase this, or my inlists. Much gratitude for any help!

Cheers, Johannes
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