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Friction reduction by chemical additives in the turbulent flow of fibre suspensions
Author(s) -
Bilgen E.,
Boulos R.
Publication year - 1973
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.5450510403
Subject(s) - materials science , guar gum , polyethylene , turbulence , composite material , suspension (topology) , tube (container) , viscoelasticity , flow (mathematics) , polyethylene oxide , chemistry , mechanics , polymer , biochemistry , physics , mathematics , homotopy , pure mathematics
The effect of friction reducing additives on the turbulent flow characteristics of fibre suspensions have been studied experimentally by using a small diameter straight tube and a free rotating disk. The fibre concentration varied between 0.1 and 5.0%. The friction reducing additives were polyethylene oxide and guar gum. The optimum conditions for friction reduction and effects of temperature, aging and mechanical degradation have been determined; the viscoelastic behaviour of fibre suspensions with and without additives have also been studied. It is shown that the use of friction reducing additives in the turbulent flow of paper making fibre suspensions results in a friction reduction comparable to that in water and the quality of fibre suspensions can be improved.