Collision frequency for Langevin thermostat

[Neena]

GROMACS version: 2019.1
GROMACS modification: No
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Where to set the collision frequency for a Langevin thermostat in mdp files? Is it the same as nsttcouple?

[jalemkul]

No, it is tau-t: http://manual.gromacs.org/current/user-guide/mdp-options.html#run-control