What is the range of the Reynolds Number representing critical velocity in a pipe?

The Reynolds Number is a dimensionless quantity used to predict flow patterns in different fluid flow situations. In the context of pipe flow, it helps determine whether the flow is laminar or turbulent. The transition from laminar to turbulent flow occurs within a specific range of the Reynolds Number.

The critical Reynolds Number, which represents the point at which flow becomes turbulent, commonly falls between 2,000 and 4,000. Therefore, when we refer to the range of the Reynolds Number indicating critical velocity in a pipe, the correct choice reflects that transition, allowing engineers and designers to make informed decisions regarding pipe sizing and flow rates. Understanding this concept is essential for ensuring efficient fluid transport and minimizing issues such as pressure drops and potential system inefficiencies that can arise from turbulent flow.

Recognizing this critical transitional range aids in the appropriate design of plumbing systems, ensuring they operate efficiently under varying flow conditions.