Collision dynamics of two barchan dunes simulated by a simple model

Details Collision dynamics of two barchan dunes simulated by a simple model Collision dynamics of two barchan dunes simulated by a simple model

2004-03-12

arxiv.org/abs/cond-mat/0403312v4

Journal of the Physical Society of Japan, Vol.74, No.2, (2005) 538-541

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures : To be published in Journal of the Physical Society of Japan

Scientific paper

10.1143/JPSJ.74.538

The collision processes of two crescentic dunes called barchans are systematically studied using a simple computer simulation model. The simulated processes, coalescence, ejection and reorganization, qualitatively correspond to those observed in a water tank experiment. Moreover we found the realized types of collision depend both on the mass ratio and on the lateral distance between barchans under initial conditions. A simple set of differential equations to describe the collision of one-dimensional (1D) dunes is introduced.

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