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A theoretical and experimental investigation of fiber suspension drainage in the turbulent regime: Part 2. An experimental study of turbulent drainage using model nylon fibers with application to practical papermaking suspensions
Author(s) -
Meadley C. K.
Publication year - 1963
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.5450410303
Subject(s) - drainage , papermaking , turbulence , suspension (topology) , mechanics , pressure drop , fiber , materials science , range (aeronautics) , composite material , mathematics , physics , ecology , homotopy , pure mathematics , biology
Results of drainage experiments using a laboratory hand sheet machine and model nylon fiber suspensions are presented and discussed. The discussion is concerned with the measurement of two general parameters of the turbulent drainage theory, previously published as Part I of this study, and the ability of the theory using these measured values to predict nylon suspension drainage characteristics over a wide range of conditions. In addition, results of drainage tests with groundwood and sulphite fractionated stocks are discussed in terms of the application of this theory to natural fiber suspensions. In general, it was found that, in the realm of practical papermaking represented by high machine speeds, drainage resistance is proportional to the square of the filtration rate and the turbulent pressure drop concept applies.