2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/24266Granular surface flows are common in industrial practice and natural systems, however, theoretical description of such flows is at present incomplete. Two prototype systems involving surface flow are compared: heap formation by pouring at a point and rotating cylinders. Continuum models for analysis of these flows are reviewed, and experimental results for quasi-2d systems are presented. Experimental results in both systems are well described by continuum models.7 pages, 5 figuresSoft Condensed Mattertext