Which Reynolds number range is associated with turbulent flow according to the material?

Which Reynolds number range is associated with turbulent flow according to the material?

• A. Re < 2100
• B. Re > 2300
• C. 2100 < Re < 2300
• D. Re = 3000

Answer: (B)

Reynolds number measures the balance between inertial forces and viscous forces in a pipe flow. When inertia dominates, the smooth layers lose stability and the flow becomes turbulent. In this material, that turbulent regime is associated with Reynolds numbers greater than 2300, so Re > 2300 covers the turbulent range. A value like Re = 3000 sits in this turbulent region. Below about 2100 the flow is typically laminar, and the interval around 2100–2300 is often a transitional zone where the flow can switch between laminar and turbulent depending on disturbances.

Reynolds number measures the balance between inertial forces and viscous forces in a pipe flow. When inertia dominates, the smooth layers lose stability and the flow becomes turbulent. In this material, that turbulent regime is associated with Reynolds numbers greater than 2300, so Re > 2300 covers the turbulent range. A value like Re = 3000 sits in this turbulent region. Below about 2100 the flow is typically laminar, and the interval around 2100–2300 is often a transitional zone where the flow can switch between laminar and turbulent depending on disturbances.