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Cellular Model for Sand Dunes with Saltation, Avalanche and Strong Erosion: Collisional Simulation of Barchans by Atsunari Katsuki; Macoto Kikuchi; Hiraku Nishimori; Noritaka Endo; Keisuke Taniguchi is a Environmental Science article available to read on EtoBox.
What is Cellular Model for Sand Dunes with Saltation, Avalanche and Strong Erosion: Collisional Simulation of Barchans about?
## Abstract Barchans are crescent‐shaped dunes that form under unidirectional wind in areas of limited sand supply. The recent development of flume experiments and computer simulations has renewed interest in the interaction dynamics of two or more barchans. From the flume experiment, four distinguishable types of collision patterns between two barchans have been observed: coalescence, ejection, split and reorganization. We have proposed a simple cellular model for numerical simulations of dune dynamics, in which saltation and avalanche are elementary processes. In the present paper, we first describe the model in detail. The model reproduces three types of collision patterns: coalescence, ejection, and reorganization. The largest reason for a split pattern not to occur is the lack of an effect of the flow separation at the brink line of dunes and the recirculation bubble that it produces. We then model the effect of the recirculation bubble by assuming that strong erosion occurs at the reattachment point of the separation flow. The strong‐erosion model successfully reproduces all the collision patterns. Thus, three elementary processes – saltation, avalanche and strong‐erosion – a
Who reads Cellular Model for Sand Dunes with Saltation, Avalanche and Strong Erosion: Collisional Simulation of Barchans?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Atsunari Katsuki; Macoto Kikuchi; Hiraku Nishimori; Noritaka Endo; Keisuke Taniguchi
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0360-1269)
- Published
- 2011
- Language
- EN
- Field
- Environmental Science (Physical Sciences)