Viscous flow around three-dimensional macroscopic cavities in a granular material. (25th January 2022)

• Record Type: Journal Article
• Authors: Sano, Osamu; Karmakar, Timir; Raja Sekhar, G.P.
• Is Part Of: Journal of fluid mechanics. Volume 931(2022)
• Publication Date: 2022-01-25
• Subjects: hydraulic control -- avalanches -- general fluid mechanics; Fluid mechanics -- Periodicals; 532.005
• DOI: 10.1017/jfm.2021.947
• Languages: English
• ISSNs: 0022-1120

Abstract

Abstract: Abstract : Viscous flow around spherical macroscopic cavities in a granular material is investigated. The Stokes equation inside and the Darcy–Brinkman equation outside the cavities are considered. In particular, the interaction of two equally sized cavities positioned in tandem is examined in detail, where the asymptotic effect of the other cavity is taken into account. The present analysis gives a reasonable estimate on the volume flow into the cavity and the local enhancement of stresses. This is applicable to predict the microscale waterway formation in that material, onset of landslides, collapse of cliffs and river banks, etc.