Classification and Measurement of Flow Patterns of Settling Slurry Flow in a Horizontal Pipe

Abstract

Flow patterns of settling slurry flow in a horizontal pipe can be represented graphically on the pressure drop-flow rate relation at a constant concentration, because the mechanism of pressure drop depends makedly on the flow regimes: stationary bed, sliding bed or moving bed, saltation flow, heterogeneous flow, and pseudo-homogeneous flow. Although it is difficult to clarify the sharp boundaries between these categories, the criterion based on concentration distributions may be one of the most effective parameters that depend on the degree of homogeneity. The main objective of this paper is, therefore, to discuss criteria for determining flow patterns and an analytical method of concentration distributions, introducing an interesting method of displaying solids flow behavior on a monitoring screen.