system run under isobaric condition but without thermostat

Hi, all lammps uers,
I build a system and a heat flow is applied to the system. I need the system run under isobaric condition but without thermostat. As I know, fix npt let the system run under isobaric condition, but the temperature is controlled by thermostat. fix nve does not apply any thermostat, but it does not run under isobaric condition. Is there any command of lammps can do my job? Any suggestion will be appreciated.

Regards.

you can use fix nph or a combination of fix nve with fix press/berendsen. axel.