An incompressible fluid (kinematic viscosity, 7.4 × 10

An incompressible fluid (kinematic viscosity, 7.4 × 10^–7 m²/s, specific gravity, 0.88) is held between two parallel plates. If the top plate is moved with a velocity of 0.5 m/s while the bottom one is held stationary, the fluid attains a linear velocity profile in the gap of 0.5 mm between these plates: the shear stress in Pascals on the surface of top plate is

Given:
υ = 7.4 × 10^–7 m² /s
ρ = 0.88 × 1000 = 880
v = 0.5 m/s

Shear stress, τ = μ⋅	du	= (υ × ρ) ×	du
	dy		dy

= 7.4 × 10^–7 × 800 ×	0.5	= 0.6512.
	(0.0005)