低粘度幂律流体拉伸与剪切流变关系的实验研究

IF 2.8 2区 工程技术 Q2 MECHANICS
Yuzuki Matsumoto , Misa Kawaguchi , Yoshiyuki Tagawa
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引用次数: 0

摘要

本文研究了低粘度幂律流体的拉伸粘度和剪切粘度之间的关系。我们展示了第一个实验证据,证明伸展和剪切粘度满足相同幂指数的条件,正如卡罗模型所表明的那样。用毛细管破裂拉伸流变仪(CaBER-DoS)和剪切流变仪分别测量了不同Oh值的拉伸粘度和剪切粘度。测定的粘度范围为:剪切粘度约为0 (100)~ 0 (104)mPa s,表观拉伸粘度约为0 (101)~ 0 (103)mPa s。我们的实验结果表明,至少在Oh>;1范围内,即使在我们的实验条件下,对于低粘度流体,液丝半径、表观拉伸粘度和剪切粘度的幂律表达式仍然成立。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental study on the relationship between extensional and shear rheology of low-viscosity power-law fluids
This paper investigates the relationship between extensional and shear viscosity of low-viscosity power-law fluids. We show the first experimental evidence of the conditions satisfying the same power exponents for extensional and shear viscosity, as indicated by the Carreau model. The extensional and shear viscosity are respectively measured by capillary breakup extensional rheometry dripping-onto-substrate (CaBER-DoS) and by a shear rheometer for various Ohnesorge number Oh. The viscosity ranges measured are about O(100) to O(104) mPa s for shear viscosity and O(101) to O(103) mPa s for apparent extensional viscosity. Our experimental results show that, at least for the range of Oh>1, the power-law expression for the liquid filament radius, apparent extensional viscosity, and shear viscosity holds, even for low-viscosity fluids under our experimental conditions.
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来源期刊
CiteScore
5.00
自引率
19.40%
发文量
109
审稿时长
61 days
期刊介绍: The Journal of Non-Newtonian Fluid Mechanics publishes research on flowing soft matter systems. Submissions in all areas of flowing complex fluids are welcomed, including polymer melts and solutions, suspensions, colloids, surfactant solutions, biological fluids, gels, liquid crystals and granular materials. Flow problems relevant to microfluidics, lab-on-a-chip, nanofluidics, biological flows, geophysical flows, industrial processes and other applications are of interest. Subjects considered suitable for the journal include the following (not necessarily in order of importance): Theoretical, computational and experimental studies of naturally or technologically relevant flow problems where the non-Newtonian nature of the fluid is important in determining the character of the flow. We seek in particular studies that lend mechanistic insight into flow behavior in complex fluids or highlight flow phenomena unique to complex fluids. Examples include Instabilities, unsteady and turbulent or chaotic flow characteristics in non-Newtonian fluids, Multiphase flows involving complex fluids, Problems involving transport phenomena such as heat and mass transfer and mixing, to the extent that the non-Newtonian flow behavior is central to the transport phenomena, Novel flow situations that suggest the need for further theoretical study, Practical situations of flow that are in need of systematic theoretical and experimental research. Such issues and developments commonly arise, for example, in the polymer processing, petroleum, pharmaceutical, biomedical and consumer product industries.
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