I want to use two pair potentials acting on one atom type. In lammps it can be done using pair_style hybrid. Is their anyway to use the same in gromacs as well.
I tried some options using charge extension groups. In particular I used two pair potential forms, one is lj9_6 and the other one buckinghum. When I tried to generate the tpr file I getting the error, the error is as follows,
WARNING 1 [file ffnonbonded.itp, line 26]:
Overriding non-bonded parameters,
I know one thing about above mentioned error that the parameters for the atomtypes are mentioned twice in the itp file, It will use the latter values for the non-bonded parameters.
Please help in solving this problem.
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