教師資料查詢 | 類別: 期刊論文 | 教師: 李政賢 CHENG-HSIEN LEE (瀏覽個人網頁)

標題:A three-dimensional continuum model incorporating static and kinetic effects for granular flows with applications to collapse of a two-dimensional granular column
學年104
學期1
出版(發表)日期2015/11/20
作品名稱A three-dimensional continuum model incorporating static and kinetic effects for granular flows with applications to collapse of a two-dimensional granular column
作品名稱(其他語言)
著者Lee, Cheng-Hsien; Huang, Zhenhua; Chiew, Yee-Meng
單位
出版者
著錄名稱、卷期、頁數Physics of Fluids 27(11), 113303(23 pages)
摘要This work extends a one-dimensional continuum model for granular flows down inclined planes [C. H. Lee and C. J. Huang, “Kinetic-theory-based model of dense granular flows down inclined planes,” Phys. Fluids 24, 073303 (2012)] to solve three-dimensional problems involving both static and flow states. The new model decomposes the shear stress and pressure into enduring-contact and kinetic components. One novelty of the present model is the determination of the enduring-contact component of pressure, which is a composition of a pressure depending only on the volume fraction and a pressure derived from the dilatancy law together with the equation of state from the kinetic theory. Another novelty of this study is a new numerical scheme that can avoid numerical instability caused by large volume fractions. To demonstrate its capability, the present model is applied to simulate the collapse of a granular column with various aspect ratios. The evolution of the column shape, the flow field, the final height, and the run-out predicted by the present model agree well with those provided by discrete element methods and experiments.
關鍵字
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作國外;
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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