[gmx-users] viscosity calculation using g_energy (3.3.3)

[JMandumpal]

Dear GROMACS users,

                           As explained in the manual ( page 139, section 6.5/3.3.3) I would like to calculate viscosity of my system ( water) using g_energy. I opted    (40  Mu-X ) from the g-energy selection. But the unit written on the Y axis of the corresponding xvg file is  (kJ mol\S-1\N). I think GROMACS uses SI unit , which is Pa-Second in the case of viscosity. Then why is this discrepancy.? Or did I make any mistake?


------I give the command on the prompt:

g-energy -f ener.edr - o viscosity.xvg ; 
then chose option 40 ( Mu-X).

system details:
******************
My system consists of 500 TIP4P water molecules, ran for 3.5 nanoseconds at 150K, the ensemble is NPT. The version I am using is 3.3.3




regards,
Jes
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