New viscosity measurement technique by using rotational breakup of electrostatically levitated droplet
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- WATAHIKI Soma
- Department of Engineering Mechanics and Energy, University of Tsukuba
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- MATSUMOTO Satoshi
- Japan Aerospace Exploration Agency
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- ABE Yutaka
- Department of Engineering Mechanics and Energy, University of Tsukuba
Bibliographic Information
- Other Title
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- 静電浮遊液滴の回転分裂を用いた新たな粘性測定法
Abstract
<p>New viscosity measurement technique by using rotational breakup of electrostatically levitated droplet was developed. The new one-dimensional viscosity measurement equation is derived by integrating three-dimensional momentum equation based on the assumptions with axisymmetric shape and internal flow of levitated droplet. From the measurement result obtained, internal flow around the center of the dumbbell shape droplet is axisymmetric along the elongational axis. This result means that the present proposed new method is appropriate. In the present study, high accuracy image processing technique is applied to obtain the shape and curvature around the center of the dumbbell shape droplet by using the transformation to rotating coordinate system. The present technique can be applicable after the breakup start and before the shape of the droplet becomes asymmetric. This is reason why Euler force becomes so large that the symmetricity cannot be sustained. The newly proposed viscosity measurement technique makes it possible to estimate the viscosity within 10 % error in the range of the viscosity which the previous levitation technique cannot be available.</p>
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 83 (852), 16-00476-16-00476, 2017
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
- 1390282680492948736
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- NII Article ID
- 130006003958
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- ISSN
- 21879761
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed