Hi, In manual gmx 3.3, I find "if possible, the total charge of a charge group should be zero" .
In my systems, I want to do an artificial charge distribution model. So I have some questions: 1. I don't know whether it is right that I don't make the total charge to zero in one charge group. 2. Take an example, I add charge on a single wall nanotube. How do I define charge group? 1 or 2 or 3 in a group? Thanks in advance. Chunlei Wang
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