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Relaminarisation and pipe flow

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Dieter Britz

Dec 11, 2015, 8:39:07 AM12/11/15
Is there anybody home here?

I have a question. I have read some papers on relaminarisation
of flow in a pipe, e.g. after a bend in the pipe. Someone who
worked on this told me once that this hints at there not being,
theoretically, a limit on Re for laminar flow in a pipe, and
turbulence in a pipe is due to roughness etc.

Is this true? Or is it thought true by some fluid mech people?

Dieter Britz
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