Near wall effects in the plug flow of pulp suspensions
Artikel i vetenskaplig tidskrift, 2011

Experimental data by the authors are further analysed to gain a more detailed understanding of the mechanisms of the plug flow and near-wall behaviour in the pipe flow of pulp suspensions at concentrations up to 4.7% by weight. The results indicate two-phase flow effects near the wall, one being that the apparent viscosity is higher than that of water. Another is that the wall shear stress estimated with the pressure drop data and a force balance is much higher than the one obtained with the measured velocity profile, indicating the presence of mechanical friction forces.

fiber suspensions

cfd

plug flow

pipe-flow

pulp suspensions

uvp

yield-stress

flow mechanisms

flow models

dynamics

Författare

Helena Fock

Chalmers, Kemi- och bioteknik, Kemisk apparatteknik

Julia Claesson

Chalmers, Kemi- och bioteknik, Kemisk apparatteknik

Anders Rasmuson

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Kemisk apparatteknik

T. Wikstrom

Metso Paper

Canadian Journal of Chemical Engineering

0008-4034 (ISSN)

Vol. 89 1207-1216

Ämneskategorier

Kemi

DOI

10.1002/cjce.20471