It certainly is desirable to have precise values of Reynolds numbers for
laminar, transitional, and turbulent flows, but this is not the case in practice.
It turns out that the transition from laminar to turbulent flow also depends
on the degree of disturbance of the flow by surface roughness, pipe vibrations,
and fluctuations in the flow. Under most practical conditions, the flow
in a circular pipe is laminar for Re & 2300, turbulent for Re * 4000, and
transitional in between
It certainly is desirable to have precise values of Reynolds numbers forlaminar, transitional, and turbulent flows, but this is not the case in practice.It turns out that the transition from laminar to turbulent flow also dependson the degree of disturbance of the flow by surface roughness, pipe vibrations,and fluctuations in the flow. Under most practical conditions, the flowin a circular pipe is laminar for Re & 2300, turbulent for Re * 4000, andtransitional in between
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