Disks aligned in a turbulent channel. (28th April 2015)

• Record Type: Journal Article
• Authors: Voth, Greg A.
• Is Part Of: Journal of fluid mechanics. Volume 772(2015:Jun.)
• Page Start: 1
• Page End: 4
• Publication Date: 2015-04-28
• Subjects: channel flow, -- particle/fluid flow, -- turbulence simulation; Fluid mechanics -- Periodicals; 532.005
• DOI: 10.1017/jfm.2015.144
• Languages: English
• ISSNs: 0022-1120

Abstract

Abstract : Anisotropic particles are suspended in a wide range of industrial, environmental and biological fluid flows. The orientations of these particles are sometimes randomized by turbulence, but often they are brought into preferential alignment by the fluid flow. In a recently published study, Challabotla, Zhao & Andersson ( J. Fluid Mech., vol. 766, 2015, R2) performed the first numerical simulations of inertial disks in a turbulent channel flow. They find that disks can be made to preferentially align either parallel or perpendicular to the wall depending on the particle density. Particle shape also affects alignment, particularly for lower density particles, and the alignment of disks is quite different from the alignment of fibres.