Low Re Flow in periodic (sinusoidal) roughness piping
Low Re Flow in periodic (sinusoidal) roughness piping
(OP)
Looking for information/insights as to why piping that contains sinusoidal roughness patterns (6" diameter pipe, 1/8" wave amplitude, 1/2" wavelength) may have a lower resistance than smooth piping at very low Reynolds Numbers.
tiwanaku
tiwanaku





RE: Low Re Flow in periodic (sinusoidal) roughness piping
What is happening at the peaks and troughs of the ripples in the pipe wall? Could local separation be causing flow to be turbulent locally, thus reducing the friction factor?
Brian
RE: Low Re Flow in periodic (sinusoidal) roughness piping
Is the 1/8" ripple (total or half?) depth outside or inside of the inner pipe base diameter?
prex
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RE: Low Re Flow in periodic (sinusoidal) roughness piping
tiwanaku