The shear viscosity of the SPC and SPC/E water models at 277 and 300 K
has been determined using equilibrium molecular dynamics. Good agreem
ent with experiment was obtained for the SPC/E model at both temperatu
res. The viscosity of the SPC model was lower than the experimental va
lue at both temperatures and displayed only a small temperature depend
ence. The effect of using a reaction field treatment for the long-rang
e electrostatic interaction was also investigated and found to be negl
igible.