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Based on Reynolds number when is the flow of fluid is laminar, turbulent or in transient state ?

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Based on Reynolds number when is the flow of fluid is laminar, turbulent or in transient state ?

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Give us the range of the value of Reynolds number for each state.

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Prabhuram

Well, it can't be entirely fixed whether the Re range under which the flows are classified. In convention, for internal flows,

Re < 2000 is regarded to be laminar

2000 < Re < 4000 is regarded to be transitional flow

Re > 4000 is most often turbulent.

On the other hand, for external flows,

Re > 5E5 is said to be turbulent

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