[gmx-users] gmx 3.1.4 vs 3.2.1
arloa at mail.fcq.unc.edu.ar
Fri Nov 5 14:53:50 CET 2004
I am testing gmx 3.1.4 vs 3.2.1. For several systems, I have calculated the
potential energy using the same pdb, topology, compiler, etc.
When comparing the results, the Long range part of the LJ energy is the only
term that varies by a significant amount (about 10%) between the two
versions. The LR-LJ energies calculated with 3.1.4 are always smaller than
the calculated with 3.2.1.
When you use a twin-range cutoff of 0.9-1.2 and compare with the results made
with a single 1.2 nm cutoff, the sum of SR-LJ + LR-LJ of the twin-range only
coincides with the result of the single cutoff when you use 3.2.1.
Is this indicating that the LR-LJ term is not correctly calculated in gmx
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