| 简单剪切流动中液滴断裂机理 |
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| 引用本文： | 林长志,郭烈锦.简单剪切流动中液滴断裂机理[J].中国化学工程学报,2007,15(1):1-5. |
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| 作者姓名： | 林长志 郭烈锦 |
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| 作者单位： | State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University，State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University，Xi'an 710049 China，Xi’an 710049 China |
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| 摘 要： | The experimental results of the deformation and breakup of a single drop immersed in a Newtonian liquid and subjected to a constant shear rate which generated by counter rotating Couette apparatus were presented in this paper. From experimental observations, the breakup occurred by three mechanisms, namely, necking, end pinching, and capillary instability. Quantitative results for the deformation and breakup of drop are presented. The maximum diameter and Sauter mean diameter of daughter drops and capillary thread radius are linearly related to the inverse shear rate and independent of the initial drop size, the dimensionless wavelength which is the wavelength divided by the thread width at breakup is independent of the shear rate and initial drop size, and the deformation of threads follows a pseudo-affine deformation for Cai/Cac larger than 2.
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| 关 键 词： | 剪切流 液滴变形 动态瞬变过程 牛顿流体 乳浊液 |
| 收稿时间： | 27 July 2006 |
| 修稿时间： | 2006-07-27 |
Experimental study of drop deformation and breakup in simple shear flows |
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| LIN ,Changzhi,GUO ,Liejin.Experimental study of drop deformation and breakup in simple shear flows[J].Chinese Journal of Chemical Engineering,2007,15(1):1-5. |
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| Authors: | LIN Changzhi GUO Liejin |
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| Affiliation: | State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | The experimental results of the deformation and breakup of a single drop immersed in a Newtonian liquid and subjected to a constant shear rate which generated by counter rotating Couette apparatus were presented in this paper. From experimental observations, the breakup occurred by three mechanisms, namely, necking, end pinching, and capillary instability. Quantitative results for the deformation and breakup of drop are presented. The maximum diameter and Sauter mean diameter of daughter drops and capillary thread radius are linearly related to the inverse shear rate and independent of the initial drop size, the dimensionless wavelength which is the wavelength divided by the thread width at breakup is independent of the shear rate and initial drop size, and the deformation of threads follows a pseudo-affine deformation for Cai/Cac larger than 2. |
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| Keywords: | drop deformation breakup Couette shear flow |
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