A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, η0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is________________?

Question

Accepted Answer

20 KPa. For a Bingham fluid under steady shear, the shear stress is calculated as $	au = \eta_0 + \mu \frac{dv}{dy}$. Given the setup, the shear stress equals $2	imes 10$ KPa.