Question

The Reynolds number for laminar flow is

• A. More than $4000$
• B. More than $2100$
• C. Less than $2100$
• D. Between $2100$ and $4000$

Answer 1

The correct option is C Less than $2100$


During laminar flow, the stream lines are equally spaced and are highly ordered. However during turbulent flow regime, the stream lines cross each other at several points.
Laminar flow occurs for Reynolds number $R{e}_N\le 2100$