Thanks, David.

Let me simplify my system. It includes A and B molecules. The van der Waals 
interaction between A's is, e.g. U1(r) = -1/r cutted off at r = r_A ; and for 
B: U2(r) = -1/r^2, cut off at r = r_B. 

I don't know how to handle with two potentials and two cutoffs simultaneously.





-----------------------------------


Dear all,

I'm trying to simulate multiple phases in one system. Each phase has distinct 
van der Waals potential form and different
cutoffs from the rest. Unfortunately, I found only one van der Waals potential 
and one cutoff can be defined in .mdp file of one run. Did I miss some features 
of GROMACS? Have you encountered this problem before and could you lend a help?

Thank you
Cynthia


      
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