Theory 160/Lubricants/Rate lens
Film Forms at Entrainment Rate
The claim
Lubricating film thickness is set by the rate at which surfaces entrain oil into the contact rather than by oil viscosity alone.
01Mechanism
Film builds as surfaces drag fluid into the gap; the entrainment rate sets the thickness.
02Prediction
Film should track entrainment rate.
03Refutation
Film tracking viscosity would remove speed.