Question

If every particle of fluid has irregular flow, that flow is said to be:

• A. Laminar flow
• B. Turbulent flow
• C. Fluid flow
• D. Laminar flow & Turbulent flow

Hint:

For pipe flow, a Reynolds number ($Re$) greater than 4000 usually indicates turbulent flow, while $Re$ less than 2100 indicates laminar flow.

Answer 1

The Correct Option is B

Fluid particles can either follow smooth, orderly paths or move about chaotically. When every single particle in the flow follows an irregular, unpredictable path rather than a smooth streamline, with eddies and swirls forming throughout, that motion is called turbulent flow. Laminar flow is the opposite case, where particles move in neat, parallel layers without crossing each other. Since the question describes irregular motion of every particle, the correct term is turbulent flow.