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題名 | 均一粒徑液滴懸浮系統之沉降運動=Sedimentation of a Mono-Dispersion of Liquid Drops |
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作者姓名(中文) | 陳時欣; 洪健益; 王智弘; 黃力彬; | 書刊名 | 技術學刊 |
卷期 | 14:1 1999.03[民88.03] |
頁次 | 頁93-99 |
分類號 | 460.02 |
關鍵詞 | 液滴; 乳液; 膠體懸浮系統; 沉降運動; Liquid drop; Emulsion; Colloidal suspension; Sedimentation; |
語文 | 中文(Chinese) |
中文摘要 | 本文以完全解析法探討液滴於一球形小室中心之運動行為。基於雷諾數小的假設, 流體之行為得視為擬穩定狀態。此外,液滴內外流體之黏度可為任意值。三種小室模型於本 文中探討:不滑移邊界模型、Happel模型及Kuwabara 模型。於此三種模型考慮下,液滴於 孔洞中之運動速度及流場分佈均以解析形式求出。一般而言,當液滴與小室壁面相靠近時, 其邊界效應對液滴運動行為的影響會很明顯。本文同時也考慮了粒子濃度效應對液滴懸浮系 統平均沉降速度的影響。 |
英文摘要 | An analytical study is presented for the translation of a fluid drop located at the center of a spherical cavity. The Reynolds number is assumed to be small so that the fluid flow may be viewed as quasi-steady. The viscosities of the droplet and the cavity surroundings may be different. Three boundary conditions are considered on the cavity wall: no-slip boundary, Happel model and Kuwabara model. The appropriate momentum equations are solved for each system and the particle velocities for an applied body force are derived in closed forms. In general, the boundary effects of the cavity wall on the creeping motion of a liquid drop can be significant when the gap between droplet surface and cavity wall is small. Also, the concentration effects on the averaged sedimenting velocity are discussed in this article. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。