I adapted an example first-principles water simulation to do simulations of liquid SiO2, but did not know what I was doing and did not remove a Grimme dispersion correction term.
It would be great to get some guidance on whether there is likely to be much difference between including and not including a dispersion correction in a non-water system.
It seems like dispersion forces are likely to be minimal in a dense liquid like SiO2 (compared to water) but this is not my forte. Maybe Grimme correction terms act regardless of the system. I have not been able to find any newbie-level guidance online. Could anyone please help me think through this?