Question

Crude oil of kinematic viscosity 2.25 Stokes flows through a 20 cm diameter pipe. If the rate of flow is 1.5 liters/sec, what will be the type of flow?

• A. Laminar
• B. Turbulent
• C. Transition
• D. Rotational

Hint:

Use the Reynolds number to quickly identify flow regimes: laminar, transitional, or turbulent.

Answer 1

The Correct Option is A

The flow type is determined using the Reynolds number formula:

\( Re = \frac{\rho v D}{\mu} \)

Given \( D = 20 \, \text{cm}, \, v = 1.5 \, \text{L/sec}, \) and kinematic viscosity \( \nu = 2.25 \, \text{Stokes}, \) the calculated Reynolds number is below 2000, indicating laminar flow.