Flow Characteristics of Three-Dimensional Microscale Backward-Facing Step Flows
學年 98
學期 2
出版（發表）日期 2010-02-01
作品名稱 Flow Characteristics of Three-Dimensional Microscale Backward-Facing Step Flows
作品名稱（其他語言）
著者 Hsieh, Tes-Yang; Hong, Zuu-Chang; Pan, Ying-Che
單位 淡江大學機械與機電工程學系
出版者 Philadelphia: Taylor & Francis Inc.
著錄名稱、卷期、頁數 Numerical Heat Transfer, Part A: Applications 57(5), pp.331-345
摘要 The flow in three-dimensional (3-D) microscale backward-facing step is investigated using the direct simulation Monte Carlo method. To ensure the rationality of two-dimensional (2-D) simplification for a 3-D structure, the flow characteristics of the 3-D microscale backward-facing step flows with various cross-section aspect ratios are compared with those of 2-D simplification. When the cross-section aspect ratio of 3-D flow cases is greater than 5, the approaching level of 3-D flows to 2-D simplification is over 98% for the nitrogen flow with inlet Knudsen number (Kn) of 0.04. Moreover, it is found that the approaching level decreases as Kn increases. The dependence between the vortex stability and the cross-section aspect ratio is studied. It is found that the flow separation, recirculation, and reattachment will disappear as the cross-section aspect ratio is less than 1 for flows with inlet Kn of 0.04.
關鍵字
語言 en
ISSN 1040-7782; 1521-0634
期刊性質
收錄於 SCI EI
產學合作
通訊作者 Hsieh, Tes-Yang
審稿制度
國別 USA 國外
公開徵稿
出版型式 紙本
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