Mixing two force field at an interface

GROMACS version:2021
GROMACS modification: No
Here post your question

Hi Gromacs users,

I am modelling an interfacial inteactions between a mineral and SPC/E water phase. The force field employed showed that the mineral has an internal force field while the SPC/E force field was applied to the water phase. At the interface, the mineral atoms react with the SPCE water molecular with a calibrated force parameters. My questions are that how to model the force at the interface.

Kind Regards,