Determine the Sommerfeld number considering the following data for hydrodynamic bearing?

1. Diameter of bearing = 120 mm

2. Bearing pressure = 5 N/mm2

3. Oil viscosity = 30 cP

4. Journal speed = 900 rpm

5. Radial clearance = 150 microns

a. 0.2360

b. 0.0144

c. 0.0115

d. 0.0178

ANSWER: 0.0144