Abstract
An experimental study of the pulp suspension flow in a duct was performed. The duct, in which a partition plate with a tapered trailing edge was inserted, was a modeled hydraulic headbox of papermaking machines. Wakes formed downstream of the partition plate were investigated by the flow visualization, and also measurement of fiber concentration was executed. Moreover, the time-averaged and fluctuating fiber concentrations were obtained for various flow velocity. A discussion is given on the changes in the flow rate and in the fiber-concentration distribution along the duct axis. The characteristics of the pulp suspension flow were clarified.
