A hydrodynamic Journal bearing is subjected to 2000 N load

A hydrodynamic Journal bearing is subjected to 2000 N load at a rotational speed of 2000 rpm. Both bearing bore diameter and length are 40 mm. If radial clearance is 20 mm and bearing is lubricated with an oil having viscosity 0.03 Pa.s, the Sommerfeld number of the bearing is __________.

S =		r		²	μD_s
		c			P

d = 40 mm ⇒ r = 20 mm
c = 20 μm ⇒ c = 20 × 10^–3mm
μ = 0.03 PaS ⇒ μ = 0.03 × 1^–6MPa.S
D_s = 2000 rpm ⇒ D_s = 2000/60 rps

P =	p	=	2000	= 1.25 MPa
	1 × d		40 × 40

S =		20		²	×	0.03 × 10^-6 × 2000/60	= 0.8
		20 × 10^-3				1.25