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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Length scale of density waves in the gravitational flow of fine grains in pipes

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Franklin, Erick de Moraes [1] ; Zambrano, Carlos Alvarez [1]
Total Authors: 2
[1] Univ Estadual Campinas, UNICAMP, Fac Mech Engn, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 37, n. 5, p. 1507-1513, SEP 2015.
Web of Science Citations: 2

Gravitational flow of grains in pipes is frequently encountered in industry. When the grains and pipes are size-constrained, granular flow may result in density waves consisting of alternate high- and low-compactness regions. This paper discusses the length scale of density waves that appear when fine grains fall vertically in pipes. A one-dimensional model and a linear stability analysis of the model are presented. The analysis suggests the presence of long-wavelength instability for the most unstable mode, moreover, a cutoff wavenumber from which the length scale is estimated. Finally, the model results are compared to experimental data. (AU)

FAPESP's process: 12/19562-6 - The transport of grains as bed-load and the instabilities of a granular bed
Grantee:Erick de Moraes Franklin
Support type: Research Grants - Young Investigators Grants