Question

In a laminar flow, the velocity of the liquid in contact with the walls of the tube is :

• A. Zero
• B. Maximum
• C. In between zero and maximum
• D. Equal to critical velocity

Answer 1

The correct option is A Zero

Answer is A.
The common application of laminar flow would be in the smooth flow of a viscous liquid through a tube or pipe. In that case, the velocity of flow varies from zero at the walls to a maximum along the center line of the vessel. The flow profile of laminar flow in a tube can be calculated by dividing the flow into thin cylindrical elements and applying the viscous force to them.
Hence, In a laminar flow the velocity of the liquid in contact with the walls of the tube is zero.