A discrete stochastic model for ripple dynamics induced by water shear flow in an annular cell
نویسندگان
چکیده
The interaction between a fluid and a granular material plays a crucial role in a large class of phenomena such as river-bed morphology and river transport of sediments, aeolian sand dunes and ripples dynamics. Standard models involve deterministic continuum equations or, alternatively, Lattice Boltzmann and Lattice Gas Cellular Automata. We here introduce a toy-model to address the issue of ripple formation and evolution. Our simplified approach accounts for the basic physical mechanisms and enables to reproduce the observed phenomenology in the framework of an innovative stochastic discrete formulation. PACS. 47.54.+r Pattern selection; pattern formation – 45.70.-n Granular systems – 05.65.+b Selforganized systems
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