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 two-phase flow model for submarine granular flows: With an application to collapse of deeply-submerged granular columns
學年106
學期2
出版(發表)日期2018/05/01
作品名稱A two-phase flow model for submarine granular flows: With an application to collapse of deeply-submerged granular columns
作品名稱(其他語言)
著者Cheng-Hsien Lee; Zhenhua Huang
單位
出版者
著錄名稱、卷期、頁數Advances in Water Resources 115, p.286-300
摘要The collapse process of a submerged granular column is strongly affected by its initial packing. Previous models for particle response time, which is used to quantify the drag force between the solid and liquid phases in rheology-based two-phase flow models, have difficulty in simulating the collapse process of granular columns with different initial concentrations (initial packing conditions). This study introduces a new model for particle response time, which enables us to satisfactorily model the drag force between the two phases for a wide range of volume concentration. The present model can give satisfactory results for both loose and dense packing conditions. The numerical results have shown that (i) the initial packing affects the occurrence of contractancy/diltancy behavior during the collapse process, (ii) the general buoyancy and drag force are strongly affected by the initial packing through contractancy and diltancy, and (iii) the general buoyancy and drag force can destabilize the granular material in loose packing condition but stabilize the granular material in dense packing condition. The results have shown that the collapse process of a densely-packed granular column is more sensitive to particle response time than that of a loosely-packed granular column.
關鍵字Numerical simulation;Two-phase flow model;Particle response time;Granular flow;Initial packing condition;Landslide
語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式,電子版,紙本
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