title: Chaotic mixing of granular material in slowly rotating containers as a discrete mapping.
abstract: Chaotic mixing of granular material in a two-dimensional slowly rotating noncircular container in the absence of granular diffusivity is studied analytically and numerically as a discrete mapping. The noncircularity of a drum produces a time periodic disturbance and chaotization of the flow field. The location of the fixed points of the mapping and the separatrices of the hyperbolic points are determined in a closed analytical form.(c) 1999 American Institute of Physics.
authors.affiliation: The Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, P. O. Box 653, Beer-Sheva 84105 Israel.
authors.forename: T.
authors.initials: T
authors.lastname: Elperin
authors.forename: A.
authors.initials: A
authors.lastname: Vikhansky