I want to adapt my existing MD simulation so that it can handle these three species.
For the interactions of the ions I thought that I would use the coulomb potential, but I don't know what sort of potential I should use between water and the ions.
It doesn't have to be super accurate, I'm not doing ab initio stuff. Also, am I correct in choosing coulomb between the force field between the ions?
I am representing all 3 species at a molecular level of granularity.