Measuring powder flow properties in a rotating drum. (15th August 2022)

• Record Type: Journal Article
• Authors: Neveu, A.; Francqui, F.; Lumay, G.
• Is Part Of: Measurement. Volume 200(2022)
• Publication Date: 2022-08-15
• Subjects: Powder flow -- Granular flow -- Powder characterization -- Flowability -- Powder cohesiveness; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2022.111548
• Languages: English
• ISSNs: 0263-2241

Abstract

Abstract: The rotating drum geometry is widely used to analyze the flow of powders and granular materials in low consolidation conditions. Many different physical quantities can be measured using image analysis algorithms. This variety of methods makes it difficult to compare the results obtained with different set-ups and methods. In this paper, the set of physical quantities (Dynamic angle of repose α, Cohesive index C I, Roughness index R I, Aeration A E and Thixotropy index T I ) measured by GranuDrum instrument from the images using dedicated algorithms are presented in details. Moreover, the results obtained with a set of typical powders are analyzed to illustrate the interpretation of the different measurements. For the whole set of parameters, a strong dependence to the drum rotating speed is shown by the measurement results, highlighting the importance of the measurement at different flowing speeds. Moreover, time-dependent or shear-dependent properties are evidenced. Highlights: The rotating drum geometry is used to analyze the flow of powders and granular materials. The powder flow is recorded by a camera at different rotating speeds. A set of physical quantities characterizing powder flow is obtained using dedicated image treatment algorithms. The measurement methods and the analysis algorithms are presented. A selection of results obtained with typical powders is shown to illustrate the interpretation and the interest of the measurements.