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  • 學位論文

非常定氣泡在圓管內之輪廓發展解析

An Analysis of an Unsteady Driven Long Bubble in a Circular Tube Filled with Fluid

指導教授 : 許政行
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摘要


本文主要模擬圓管內部以氣泡驅動液體之流場前緣的情況。本文針對Pitts【1】假設的氣泡輪廓方程式R SinӨ 乘積為常數,做理論上的驗證並解釋流場中的物理現象。 研究結果顯示,利用利用小板法分析非定常均勻流與源流、線源流所疊合流場,可證實R SinӨ 的乘積確實為常數,其值為3.538。在實驗中有圓管管壁的存在,理論中並無管壁存在,但是利用鏡射法可以模擬管壁。 模擬出管壁後,可加入中空率 模擬長氣泡輪廓與管壁間流場狀態。

並列摘要


The goal of the present work is to study the driven flow field in a circular tube at front of a long bubble. That results show that the radius of curvature R SinӨ=constant which is assumed by Pitts 【1】 . Using unsteady flow and source flow and line source flow can verify R SinӨ=constant by panel method. The number is 3.538. Image method can simulate the wall of circular tube. Finally, the fractional converge ratio can be used to describe driven flow field of a long bubble in the circular tube.

參考文獻


【1】 Pitts, E., 1980, “Penetration of Fluid into a Hele-Shaw Cell: The Saffman-Taylor Experiment, ” Journal of Fluid Mechanics, Vol. 97, pp. 53-64.
【2】 S. Shah, 1991, "Gas Injection Molding; Current Practice", SPE Tech. Papers, 37, 1494 .
【5】 Fairbrother, F.P and Stubbs, A.E., 1935, “Studies in Electroendosmosis. Part VI. The Bubble Tube Method of Measurement, ” J. Chem. Soc. 1, 527.
【6】 Saffman, P.G. and Geofffrey Taylor, F.R.S, 1958, “The Penetration of a Fluid into a Porous Medium or Hele-Shaw Cell Containing a More Viscous Liquid, ” Proc. Roy. Soc A, Vol. 245, plate 3, pp. 312-329.
【7】 Taylor, G.I., 1960, “Deposition of a Viscous Fluid on the Wall of a Tube, ” Journal of Fluid Mechanics, Vol. 10, pp. 161-165.

被引用紀錄


陳柏壯(2006)。長氣泡擠壓流型與前端驅動流場之研究〔博士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200500800

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