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題 名 | Modified Finite Element Solutions for Planar Entry Flow of an Oldroyd-B Fluid=改良有限元素法求解黏彈性流體平面收縮流動 |
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作 者 | 黃傳家; 李克強; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 29:6 1998.11[民87.11] |
頁 次 | 頁397-404 |
分類號 | 440.137 |
關鍵詞 | 改良有限元素法; 流體; 收縮; 流動; Finite element solution; Boger fluid; Planar entry flow; |
語 文 | 英文(English) |
中文摘要 | 本研究利用改良式有限元素法求解Oldroyd-B流體在平面4:1收縮流動現象。所建構之改良數值方法包括擬穩態法,分解方法,懲罰方式及流線上游加重法以解決當彈性增大實難以得到收斂數值解之問題。本研究所得之收斂上限相當令人滿意,證明其為有效之處理工具。 |
英文摘要 | In this study a modified finite element method (FEM) is utilized to simulate the 4:1 planar entry flow of an Oldroyd-B fluid. Several numerical techniques are employed, such as the pseudo-transient method, the decoupled approach, the penalty formulation, and streamline upwinding skill, to facilitate calculation of convergent numerical solutions when fluid elasticity is in creased. This procedure yields more satisfactory results in that the upper limit of the Weissenberg number, where a convergent solution is obtainable, is much higher. |
本系統中英文摘要資訊取自各篇刊載內容。