Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 74, Issue 2, Pages 538-541Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.74.538
Keywords
sand dune; barchan dune; collision process; water tank experiment; saltation; avalanche; numerical simulation
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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 (I D) dunes is introduced.
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