Effects of end wall friction in rotating cylinder granular flow experiments

Autor:	E. Fukushima, Arvind Caprihan, B. E. Smith, Kimberly Hill, James E. Maneval
Rok vydání:	2005
Předmět:	Physics Flow (psychology) General Physics and Astronomy Drum Mechanics Cylinder (engine) law.invention Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Classical mechanics Mechanics of Materials law Free surface Rotating drum Perpendicular General Materials Science
Zdroj:	Granular Matter. 7:199-202
ISSN:	1434-7636 1434-5021
DOI:	10.1007/s10035-005-0211-4
Popis:	Dry granular flows in half-filled horizontal rotating cylinders were studied by NMR to ascertain end wall effects. We measured the velocity and density profiles in planes perpendicular to the axis of the drums for three cases: (1) Near the end wall of a long ``3D'' cylinder, (2) Near the middle of the long cylinder and, (3) For the whole of a short ``2D'' cylinder. The velocity near the free surface is fastest for the short cylinder and slowest near the end wall of the long cylinder. We believe that these differences are due to friction between the beads and the end walls, speeding up the flow for the 2D drum and reducing the near-wall speed for the 3D drum.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c226d8f555e960476cedf02dfd02bef3 https://doi.org/10.1007/s10035-005-0211-4 Zobrazit plný text záznamu Plný text ve formátu PDF