![]() The following table shows the correspondence between the Reynolds number and the regime obtained in different problems. Different configurations of the same application may have different critical Reynolds numbers. The Reynolds number is a property of the application.For this reason, it is important to understand the physics of the flow to determine the accurate domain of application and the characteristic length. The Reynolds number describes the global behavior of flow, not its local behavior in large domains, it is possible to have localized turbulent regions that do not extend to the whole domain. ![]() It is interesting to notice that the Reynolds number depends both on the material properties of the fluid and the geometrical properties of the application. It is the threshold between the laminar and the turbulent flow. The mean value of Reynolds number in the transition regime is usually named “Critical Reynolds number”. Beyond that range, the flow becomes fully turbulent. This regime is usually referred to as the “transition regime” and occurs for a specific range of the Reynolds number. ![]() When the Reynolds number exceeds a threshold value, semi-developed turbulence occurs in the flow.
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