Optimum Cell Size for Contact Detection in the Algorithm of the Discrete Element Method
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- Mio Hiroshi
- Core Research Center, KFPT, Keihanna Interaction Plaza Inc. Department of Chemical Engineering and Materials Science, Doshisha University
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- Shimosaka Atsuko
- Department of Chemical Engineering and Materials Science, Doshisha University
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- Shirakawa Yoshiyuki
- Department of Chemical Engineering and Materials Science, Doshisha University
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- Hidaka Jusuke
- Department of Chemical Engineering and Materials Science, Doshisha University
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The objective of this paper is to find out the optimum cell size for contact detection in the algorithm of DEM (Discrete Element Method) to improve the calculation speed. The computing time of contact detection was measured by using a cubic box, which contains particles, to investigate the effect of cell size. The contact detection was inefficient when too fine grid cell or large one was introduced, the optimum cell size was given around 1.5–2.0 times of particle radius. The theoretical formula for the optimum cell size was proposed by considering the effects of the number of searched cells and contact checks. A significant correlation between the computing time of DEM work and the theoretical equation was seen in all conditions of volume fraction. Furthermore, it was found that the optimum cell size was the size, which each cell has about 0.7–0.8 particles in it, and this result was applied to a modelling of random-sized particles. Therefore, the calculation speed of DEM would be improved by using the optimum cell size for the contact detection.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 38 (12), 969-975, 2005
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204569894528
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- NII論文ID
- 130000019407
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- NII書誌ID
- AA00709658
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- COI
- 1:CAS:528:DC%2BD28Xhs1Gitbw%3D
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 7873019
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可