| Project/Area Number |
16605008
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
計算科学
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| Research Institution | Hiroshima University (2005-2006)
Osaka Prefecture University (2004) |
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Principal Investigator |
NISHIMORI Hiraku Hiroshima University, Graduate School of Science, Professor (50237749)
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| Co-Investigator(Kenkyū-buntansha) |
KONISHI Tetsuro Nagoya University, Graduate School of Science, Associate Professor (30211238)
MIZUGUCHI Tsuyoshi Osaka Prefecture University, Graduate School of Engineering, Lecturer (80273431)
YANAGITA Tatsuo Hokkaido University, Research Institute of electronic Science, Assistant Professor (80242262)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | Dunes / Computational model / Geomorphology / Nonlinear Dynamics / Collision Dynamics / Clack Propagation / Pattern Formation / Barchan / 地形の動力学 / エウロパ / 数値模型 / 粉体 / 地形 / 柱状摂理 / 地形進化 / 数値計算 / 柱状節理 |
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| Research Abstract |
Through this project we obtained following two main results
i) Collision dynamics of two barchan dunes is simulated through a newly introduced computational model, which qualitatively reproduced all types of barchan collision; 1. coalescence, 2. ejection 3. split, observed in rescaled water tank experiments. In addition, we further simplified the above cell Model to a set of differential equations, and confirmed that the latter nicely describes the collision dynamics within the 2D cross-section parallel to the wind direction.
ii) Pattern Dynamics of directional crack propagation in a bulk of solid is studied through experiments and phenomenological modeling. The experiments are realized by drying a bulk of starch-water mixture and measuring the water content distribution using MR instruments. Also, the cross section with polygonal structure is visualized and the depth dependency of cell size is measured. These results are compared with a newly introduced phenomenological model.
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