Question

In a laminar flow between two fixed plates held parallel to each other at a distance d, the shear stress is:

1. Maximum at plane $\frac{d}{2}$ away from each plate and zero at the plate boundaries.

2. Zero throughout the passage.

3. Maximum at the plate boundaries and zero at a plane $\frac{d}{2}$ away from each plate.

Which of the above statements is/are correct?

• A. 1 only
• B. 3 only
• C. 2 only
• D. 1, 2 and 3

Answer 1

The correct option is B 3 only

Shear stress is maximum at plate boundaries and zero at plane $\frac{d}{2}$ away from each plate.