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|Title:||Length scale of density waves in the gravitational flow of fine grains in pipes|
|Author:||Franklin, Erick de Moraes|
Zambrano, Carlos Alvarez
|Abstract:||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|
|Appears in Collections:||FEM - Artigos e Outros Documentos|
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