# Coupling Mascaret with Telemac-2d

**URL:** <https://opentelemac.org/forum/t/coupling-mascaret-with-telemac-2d/7059>\
**Category:** TELAPY / ADAO / OPENTURNS / and co.\
**Created:** [December 20, 2021, 9:31am UTC](https://opentelemac.org/forum/t/coupling-mascaret-with-telemac-2d/7059 "2021-12-20T09:31:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![user\_15637](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/bbe5ce/32.png) [@user\_15637](https://opentelemac.org/forum/u/user_15637)\
**Post date:** [December 20, 2021, 9:31am UTC](https://opentelemac.org/forum/t/coupling-mascaret-with-telemac-2d/7059/1 "2021-12-20T09:31:38Z")

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Hi [name removed],

I couldn’t find a category regarding telapy-coupling, so I’ll post my question here (please feel free to move it to an appropriate one). For the 2D model, is it mandatory to have the steering file in [group removed] otherwise the coupling won’t work, like 1D and 2D model cannot communicate?

Besides, what does the convergence criteria in the configuration .json file mean？ For height, it’s 0.01 while for velocity it’s 0.015. Is it sort of “large” in terms of convergence and why are those values? Can we set those to smaller ones?

[name removed]