Columnar structure and desiccation cracks
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- Nishimoto Akihiro
- Department of Physics, Kyoto University
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- Mizuguchi Tsuyoshi
- Department of Mathematical Sciences, Osaka Prefecture University
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- Kitsunezaki So
- Graduate School of Human Culture, Nara Women’s University
Bibliographic Information
- Other Title
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- 乾燥亀裂における柱状構造
- カンソウ キレツ ニ オケル チュウジョウ コウゾウ
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Abstract
The formation of three-dimensional prismatic cracks during the drying process of starch-water mixtures is investigated numerically. We assume that the mixture is an elastic porous medium which possesses a stress field and a water content field; the evolution of these fields is represented by, respectively, a spring network and a phenomenological model based on the water potential. As a result of numerical simulations, we reproduce the water content distribution where the drying front propagates from the surface to the interior, and the prismatic structure of cracks grows as the front progresses. The particle-diameter dependence of the columns’ scale and the downward coarsening process of the columnar structure are investigated. We find that the non-uniform fracture process is a consequenice of breaking points propagating along the sides of polygonal cross sections. We also examine the effect of the crack networks on the dynamics of the water content field. The contrast between starch columns and geological columnar joints is discussed.
Journal
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- The Journal of the Geological Society of Japan
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The Journal of the Geological Society of Japan 117 (3), 183-191, 2011
The Geological Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206238957824
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- NII Article ID
- 130000758399
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- NII Book ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL BIB ID
- 11069354
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed