TourTour Lubrication in sheet metal rolling
Computation of the film-thickness between the work rolls and the sheet
  reduction factor  t1= mm   R= m   V= m/s 
   η0= Pas    α= 1/GPa    pe= MPa
 angle of entry  mrad
 length contact zone mm
 viscosity ratio η/η0 -
 vertical load at the mill per unit length kN/m
 film-thickness hc m
 R Half diameter of the rolling mill D=2R [m]
 t1 sheet thickness entry zone [m]
 V sheet velocity entry zone [m/s]
 η viscosity [Pas]
 α viscosity pressure-coefficient [ - ]
 pe extrusion pressure [MPa]