Laboratory tests on self-excitation of concentration fluctuations in slurry pipelines

Authors:
Publisher website
Google Scholar
Abstract
High concentration solid–liquid mixtures that are conveyed by pipeline have been found to develop large amplitude concentration fluctuations.Aclosedloop laboratory circuit is used to investigate the mechanism of self-excitation. According to linear stability theory these concentration fluctuations originate from an adverse relation between the settling flux and solids concentration. Concentration variations amplify due to solids exchange with a bed layer. The internal structure of the flow is investigated by means of concentration profile measurements. The measurements show that self-excited harmonic perturbations quickly deform into sawtooth shape concentration variations. An explanatory non-linear theory is given.

This publication has 2 references indexed in Scilit: