NC State
C.P.J. Bennington and J.P. Mmbaga. Liquid-Phase Turbulence in Pulp Fibre Suspensions. In The science of papermaking, Trans. of the XIIth Fund. Res. Symp. Oxford, 2001, (C.F. Baker, ed.), pp 255–286, FRC, Manchester, 2018.


Mixing-sensitive chemical reactions have been used to study liquid-phase turbulence in a number of dispersed two-phase systems, including pulp fibre suspensions. This technique has allowed the measurement and mapping of turbulence in a number of mixing configurations at pulp mass concentrations up to Cm = 0.10 (expressed as a fraction). Liquid-phase turbulence was found to
decrease exponentially with suspension concentration, indicating that fibres are extremely efficient at dampening turbulence within a suspension. The magnitude of turbulence reduction correlates
well with the reduction in gas-liquid mass transfer, an indirect measure of liquid-phase turbulence. The energy dissipated by the fibre network is compared to predictions made using fibre net-
work theory.

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