| 拟塑性流体中伴有聚并的气泡上升混沌特征(英文) |
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| 引用本文： | 姜韶堃,马友光,范文元,杨珂,LI Huaizhi.拟塑性流体中伴有聚并的气泡上升混沌特征(英文)[J].中国化学工程学报,2010,18(1):18-26. |
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| 作者姓名： | 姜韶堃 马友光 范文元 杨珂 LI Huaizhi |
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| 作者单位： | |
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| 基金项目： | 国家自然科学基金，the Opening Project of State Key Laboratory of Chemical Engineering，the Program of Introducing Talents of Discipline to Universities |
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| 摘 要： | The chaotic characteristics of bubbles rising with accompanying coalescences in pseudoplastic aqueous carboxymethylcellulose sodium (CMC) solution were studied by means of smoothed pseudo Wigner-Ville distribution and Wigner-Hough distribution. The temporal signal of bubble passage was measured utilizing a photoconductive data acquisition system. As bubble coalescence occurred, the smoothed pseudo Wigner-Ville distribution of the signal revealed that the signal could be divided into low-frequency and high-frequency ranges and the transition range according to the distribution feature of frequency domain, which reflected eddy motion of fluid, high frequency fluctuations of fluid velocity and other random components measured in the signal, and bubbles rising accompanied with coalescences, respectively. However, bubble coalescence occurred in the lower position and the frequency range of bubbles motion became wide under higher gas flowrate, while the frequency range of bubbles motion became narrow when the CMC concentration increased. The typical dynamics of bubbles motion, such as periodicity, bifurcation and chaos, could be easily found in terms of the Wigner-Hough distribution.
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| 关 键 词： | face=Verdana>bubble pseudoplastic fluid coalescence Wigner analysis chaos |
| 收稿时间： | 2009-4-21 |
| 修稿时间： | 2009-4-21
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Chaotic characteristics of bubbles rising with coalescences in pseudoplastic fluid |
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| JIANG Shaokun,MA Youguang,FAN Wenyuan,YANG Ke,LI Huaizhi.Chaotic characteristics of bubbles rising with coalescences in pseudoplastic fluid[J].Chinese Journal of Chemical Engineering,2010,18(1):18-26. |
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| Authors: | JIANG Shaokun MA Youguang FAN Wenyuan YANG Ke LI Huaizhi |
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| Affiliation: | 1 State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China2 Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC-INPL, 1, rue Grandville, BP 451, 54001 Nancy cedex, France |
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| Abstract: | The chaotic characteristics of bubbles rising with accompanying coalescences in pseudoplastic aqueous carboxymethylcellulose sodium (CMC) solution were studied by means of smoothed pseudo Wigner-Ville distribu-tion and Wigner-Hough distribution.The temporal signal of bubble passage was measured utilizing a photoconduc-tive data acquisition system.As bubble coalescence occurred, the smoothed pseudo Wigner-Ville distribution of the signal revealed that the signal could be divided into low-frequency and high-frequency ranges and the transition range according to the distribution feature of frequency domain, which reflected eddy motion of fluid, high fre-quency fluctuations of fluid velocity and other random components measured in the signal, and bubbles rising ac-companied with coalescences, respectively.However, bubble coalescence occurred in the lower position and the frequency range of bubbles motion became wide under higher gas flowrate, while the frequency range of bubbles motion became narrow when the CMC concentration increased.The typical dynamics of bubbles motion, such as periodicity, bifurcation and chaos, could be easily found in terms of the Wigner-Hough distribution. |
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| Keywords: | bubble pseudoplastie fluid coalescence Wigner analysis chaos |
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