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ニシモリ ヒラク
NISHIMORI HIRAKU
西森 拓 所属 明治大学研究・知財戦略機構・農場 研究・知財戦略機構 職種 特任教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2012/04 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Bifurcation analysis of the transition of dune shapes under a unidirectional wind. |
| 執筆形態 | 共著(筆頭者以外) |
| 掲載誌名 | Physical review letters |
| 掲載区分 | 国外 |
| 巻・号・頁 | 108(15),pp.158001 |
| 担当区分 | 最終著者 |
| 著者・共著者 | Niiya Hirofumi, Awazu Akinori, Nishimori Hiraku |
| 概要 | This study conducts a bifurcation analysis of dune shape transitions using a simplified model called the Dune Skeleton model. It reveals how different dune shapes form under unidirectional wind conditions. The analysis shows that reducing the total sand amount or increasing lateral sand flow causes a stable straight transverse dune to change into a wavy transverse dune via a pitchfork bifurcation. Further reduction leads the wavy transverse dune to transform into barchan dunes through a Hopf bifurcation. These bifurcation patterns clarify the mechanisms behind dune shape changes driven by wind and sand dynamics. |
| DOI | 10.1103/PhysRevLett.108.158001 |
| ISSN | 1079-7114 |
| PMID | 22587286 |