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題 名 | 貯槽邊界影響顆粒流動行為之電腦模擬研究=Computer Simulations of the Effect of the Hopper Boundary on the Flowing Behavior of Particles |
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作 者 | 周春禧; 江連金; 徐毅理; 郭景宗; 蕭述三; | 書刊名 | 國立屏東科技大學學報 |
卷 期 | 7:4 1998.12[民87.12] |
頁 次 | 頁279-289 |
分類號 | 446.11 |
關鍵詞 | 離散元素法; 不對稱型貯槽; 電腦模擬; 流動式顆粒床; Discrete element method; DEM; Asymmetrical hopper; Computer simulation; Moving granular bed; |
語 文 | 中文(Chinese) |
中文摘要 | 應用[3]所發展的離散元素法(DEM)之理論模式與電腦程式,模擬7 個直徑為2cm 的圓盤狀顆粒於三種不對稱型 Hopper 之流動型態 (Flow Pattern)。三種不對稱型 Hopper 為:(1) LA=17 °,RA=18 °;(2) LA =17 °,RA=21 °;(3)LA=17 °,RA=24°。上述 LA 為左側 Hopper 邊界與直垂線之夾角,RA 為右側 Hopper 邊界與垂直線之夾角,以及三 種不對稱型 Hopper 之出口寬度皆相等。 最後,模擬 967 個直徑為 1 cm 的圓盤狀顆粒於 不對稱型 Hopper (La=15 °,RA=40 ° ) 之流動型態。由電腦模擬的結果,証實顆粒之行 為不僅受制於 Hopper 邊界之幾何形狀,而且也受制於顆粒與邊界的摩擦係數 Uw。 本研究 的電腦模擬結果與 [9-14] 的實驗觀測結果,有助於設計雛型流動式顆粒床高溫廢氣淨化系 統。 |
英文摘要 | By making use of DEM model and computer code [3], the flow pattern of 7 disks in the asymmetrical hopper is studied numerically. Three kinds of asymmetrical hopper ((i)LA=17 °,RA=18 °; (ii)LA=17 °,RA=21 °;(iii)LA=17 ° ,RA=24 ° )are used to contain seven disks of 2cm diameter, respectively. LA is the angle between the left boundary of hopper and vertical line, RA is the angle between the right boundary of hopper and vertical line, and three hopper exits are kept up the same width. Finally, the flow pattern of 967 disks in the asymmetrical hopper (LA=15 °,RA=40 ° )is studied numerically, too. The results of computer simulation show that not only the geometry of hopper boundary but also the wall friction coefficient affect the flowing behavior of disks. The numerical results reported here and the experimental results [9-14] provide fundamental and important information for designing moving granular bed flue gas cleanup filter. |
本系統中英文摘要資訊取自各篇刊載內容。