Dear all,
I am studying a water-methane system with tip4p-Ice for water and
oplsaa for methane.
What I want to try is modify the intermolecular non-bonded interaction
between methane and water. I just want to multiply the combination rule
(geometric mean) used to obtain the mean well depth (epsilon) component by
a scaling factor, without changing any of the non bonding function types.
I am aware that user defined non-bonding functions are possible. However,
here I don't want to change the function type, but only slightly modify the
combination rule 3 , by multiplying the epsilon part with a scaling factor.
Also, I find that there is no nonbond_params section in OPLSAA where I
think it would have been possible to edit cross LJ terms .
So, is there an easy way I can do it rather than going for user defined
non-bonded functions .
Is it ok to define "nonbond_params" in topology file with oplsaa
forcefield?
Please comment.
Thanks,
Sujith.
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