1.63 A 25-mm-diameter shaft is pulled through a cylindrical bear- ing as shown in Fig. Pl.63. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kine- matic...

FLUID MECHANICS

Extracted text: 1.63 A 25-mm-diameter shaft is pulled through a cylindrical bear- ing as shown in Fig. Pl.63. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kine- matic viscosity of 8.0 × 10-ª m²/s and a specific gravity of 0.91. Determine the force P required to pull the shaft at a velocity of 3 m/s. Assume the velocity distribution in the gap is linear.