Open AccessOn particle incipient motion from the sedimentation layer in shear flow
Author(s) -
Alexander Seryakov,
Oleg Bocharov,
Ya. S. Ignatenko
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1404/1/012040
Subject(s) - laminar flow , mechanics , reynolds number , shear stress , shear flow , non newtonian fluid , particle (ecology) , newtonian fluid , magnetosphere particle motion , materials science , physics , classical mechanics , geology , turbulence , oceanography , quantum mechanics , magnetic field
This paper presents the results of numerical modelling for a laminar flow around a spherical particle located near a sedimentation layer. The particle being at the minimum distance from the rough layer is affected by a fluid shear flow with Reynolds numbers varying from 2 to 200. The considered fluids included Newtonian and power law ones. Depending on a shear Reynolds number, the critical Shields numbers have been determined to describe the particle’s incipient motion. The obtained parameters have been compared against those for a smooth surface to demonstrate that in some cases the differences in critical stress coefficients may reach up to 70%.