# Viscous lubrication drag estimate
# Scope: Parallel-plate viscous shear in a supplied lubricant film; constant viscosity.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

viscosity = 0.1 Pa*s
area = 1000 mm^2
speed = 0.1 m/s
film = 0.1 mm

force := viscosity*area*speed/film [N]
power := force*speed [W]

check drag force budget: force <= 0.2 N

scenario alternative: viscosity = 0.08 Pa*s