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Evaluation on time variation of effective viscosity by ultrasonic spinning rheometry (Application to separating oil-water mixture)
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- OHIE Kohei
- Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
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- YOSHIDA Taiki
- Division of Mechanical and Aerospace Engineering, Faculty of Engineering, Hokkaido University
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- PARK Hyun Jin
- Division of Mechanical and Aerospace Engineering, Faculty of Engineering, Hokkaido University
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- TASAKA Yuji
- Division of Mechanical and Aerospace Engineering, Faculty of Engineering, Hokkaido University
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- MURAI Yuichi
- Division of Mechanical and Aerospace Engineering, Faculty of Engineering, Hokkaido University
Bibliographic Information
- Other Title
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- 超音波スピニングレオメトリを用いた過渡的変化を伴う実効粘度の評価（分離を伴う水油混合液への適用）
Description
<p>This paper evaluated measurement accuracy and precision of ultrasonic spinning rheometry (USR), which can evaluate rheological properties through equation of motion and velocity information captured by ultrasonic velocity profiler (UVP), in cases that assumptions of two-dimensional one-directional flow are not perfectly satisfied. Time variation of effective viscosity in separating oil-water mixture was examined by USR to demonstrate its applicability for both time-dependent rheological properties and multiphase media, which cannot be evaluated by conventional torque-type rheometers. Decrease in pseudoplasticity and effective viscosity of the media with time during separation of water droplets from the media accompanied by monotonic decrease in diameter and volume fraction of the droplets on the measurement line, was quantified. The time variations show the same trend with formula theoretically derived for evaluating emulsion viscosity, but the viscosity was estimated larger than the theory. An increase of effective volume fraction or non-equilibrium flow field may have increased the viscosity.</p>
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 86 (890), 20-00242-20-00242, 2020
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1391130851449675904
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- NII Article ID
- 130007930463
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- ISSN
- 21879761
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed