Optimum Cell Condition for Contact Detection Having a Large Particle Size Ratio in the Discrete Element Method

• 資料種別: 記事
• タイトル: Optimum Cell Condition for Contact Detection Having a Large Particle Size Ratio in the Discrete Element Method
• 著者・編者: Hiroshi Mio; Atsuko Shimosaka; Yoshiyuki Shirakawa 他
• 著者標目: Hiroshi Mio; Atsuko Shimosaka; Yoshiyuki Shirakawa
• タイトル（掲載誌）: Journal of chemical engineering of Japan
• 巻号年月日等（掲載誌）: 39(4) 2006.4
• 掲載巻: 39
• 掲載号: 4
• 掲載ページ: 409～416
• 掲載年月日（W3CDTF）: 2006-04
• ISSN（掲載誌）: 0021-9592
• ISSN-L（掲載誌）: 0021-9592
• 出版事項（掲載誌）: Tokyo : Society of Chemical Engineers
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• 件名標目: Speed-Up; Distinct Cell Model
• NDLC: ZP1
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z53-R395
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 7884279; http://id.ndl.go.jp/bib/7884279
• 整理区分コード: 632

• 要約等: The Distinct Cell Model (DCM) for the contact detection in the algorithm of the Discrete Element Method was proposed to improve the calculation speed when particles have a large size ratio. This model has several grids, which are overlapped three-dimensionally, and the particles having different size are boxed in a suitable grid cell. The contact detection time of this model was measured and compared with that of the conventional cell model in the simulation of a rotating dram. The contact detection using the DCM was extremely faster than that of the conventional cell model; e.g. when particles had a size ratio of <I>d</I><SUB>max</SUB>/<I>d</I><SUB>min</SUB> = 15, the speed-up was about 25. The speed-up ratio increases with increasing particle size ratio, regardless of the number of grids. This model has an advantage of being able to set optimum cell sizes for all particles, thus, the number of searching cells and contact check can be minimized. The optimum cell size of the DCM is the size that each cell has about 1 particle in it when two grids are used, 0.3–0.6 particles in the case of more than three grids. The large-scale simulation of granular flow having a large particle size ratio will be possible by using the Distinct Cell Model.
• DOI: 10.1252/jcej.39.409
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: The Distinct Cell Model (DCM) for the contact detection in the algorithm of the Discrete Element Method was proposed to improve the calculation speed when particles have a large size ratio. This model has several grids, which are overlapped three-dimensionally, and the particles having different size are boxed in a suitable grid cell. The contact detection time of this model was measured and compared with that of the conventional cell model in the simulation of a rotating dram. The contact detection using the DCM was extremely faster than that of the conventional cell model; e.g. when particles had a size ratio of <I>d</I><SUB>max</SUB>/<I>d</I><SUB>min</SUB> = 15, the speed-up was about 25. The speed-up ratio increases with increasing particle size ratio, regardless of the number of grids. This model has an advantage of being able to set optimum cell sizes for all particles, thus, the number of searching cells and contact check can be minimized. The optimum cell size of the DCM is the size that each cell has about 1 particle in it when two grids are used, 0.3–0.6 particles in the case of more than three grids. The large-scale simulation of granular flow having a large particle size ratio will be possible by using the Distinct Cell Model.
• DOI: 10.1252/jcej.39.409; https://doi.org/10.1252/jcej.39.409
• オンライン閲覧公開範囲: インターネット公開
• 関連情報（URI）: http://id.ndl.go.jp/bib/7884279; https://ndlsearch.ndl.go.jp/books/R000000004-I7884279; http://www.jstage.jst.go.jp/article/jcej/39/4/39_4_409/_pdf
• 参照: Effect of Chute Angle on Charging Behavior of Sintered Ore Particles at Bell-less Type Charging System of Blast Furnace by Discrete Element Method; https://cir.nii.ac.jp/crid/1390001206486900608; 並列化ＤＥＭによる電子写真システム内粒子攪拌挙動に及ぼすパドル回転速度の影響; https://cir.nii.ac.jp/crid/1390282679487774464; 等価転がり摩擦係数を用いた不規則な形状粒子群に対するＤＥＭシミュレーション; https://cir.nii.ac.jp/crid/1390282679488099712; Analysis of Developing Behavior in Two-Component Development System by Large-Scale Discrete Element Method; https://cir.nii.ac.jp/crid/1390282679544269440; Modeling of Solid Particle Flow in Blast Furnace Considering Actual Operation by Large-scale Discrete Element Method; https://cir.nii.ac.jp/crid/1390282681463056256; Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method; https://cir.nii.ac.jp/crid/1390282681464398848
• 参照: A discrete numerical model for granular assemblies; https://cir.nii.ac.jp/crid/1360855570104515072; Computer simulation of bubbles in large-particle fluidized beds; https://cir.nii.ac.jp/crid/1361137044290291712; The influence of DEM simulation parameters on the particle behaviour in a V-mixer; https://cir.nii.ac.jp/crid/1362825894922381312; DEM modelling of industrial granular flows: 3D case studies and the effect of particle shape on hopper discharge; https://cir.nii.ac.jp/crid/1363107369516458880; Studies in Molecular Dynamics. I. General Method; https://cir.nii.ac.jp/crid/1364233268609730176; The Terzaghi-Voigt combined model for constant-pressure consolidation of filter cakes and homogeneous semi-solid materials; https://cir.nii.ac.jp/crid/1364233270756658816; Correlation of Size Reduction Rate of Inorganic Materials with Impact Energy of Balls in Planetary Ball Milling.; https://cir.nii.ac.jp/crid/1390001204566863872; Optimum Cell Size for Contact Detection in the Algorithm of the Discrete Element Method; https://cir.nii.ac.jp/crid/1390001204569894528; Estimation of Extraction Rate of Yttrium from Fluorescent Powder by Ball Milling; https://cir.nii.ac.jp/crid/1390282679224845440
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles
• 書誌ID（NDLBibID）: 7884279; http://id.ndl.go.jp/bib/7884279
• NII論文ID: 10018112500