.. _config_ref namd membrane: ``membrane`` ------------ * ``langevinpiston``: True * ``langevinpistontarget``: $pressure * ``langevinpistonperiod``: 200 * ``langevinpistondecay``: 100 * ``langevinpistontemp``: $temperature * ``usegrouppressure``: True * ``useflexiblecell``: True * ``useconstantratio``: True NAMD parameters for membrane simulations (NPAT ensemble) .. raw:: html