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Drag reduction by fibers
Author(s) -
Sharma R. S.
Publication year - 1981
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450590101
Subject(s) - drag , pressure drop , mechanics , reynolds number , turbulence , parasitic drag , drag coefficient , fiber , reduction (mathematics) , materials science , flow (mathematics) , physics , composite material , mathematics , geometry
Drag reduction in turbulent pipe flow by means of boundary and centerline injection of long hair‐like asbestos fibers has been investigated. Pressure drop and mean velocity profiles were measured at various Reynolds numbers and injection rates in order to study some mechanistic aspects of drag reduction in water‐fiber and polymer‐fiber systems. Drag reduction in a water‐fiber system is attributed to a decrease in the momentum transfer in the turbulent‐core region, whereas synergism has been found to be a wall phenomenon.