More About Viscosity
SI viscosity units: pascal-seconds
(or joule-seconds/meter3)
1 poise = 0.10 pascal-sec.
Viscosity characterizes the ability of a fluid to “transfer momentum” across streamlines in irrotational flow.
Viscous friction force is always is opposite to direction of motion and proportional to speed.
Motor oil ratings like 10W30 are viscosity specifications.