神戸大学附属図書館デジタルアーカイブ
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https://hdl.handle.net/20.500.14094/90004933
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2024-03-28
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90004933 (fulltext)
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メタデータID
90004933
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
Shapes of single bubbles in infinite stagnant liquids contaminated with surfactant
著者
Aoyama, Shohei ; Hayashi, Kosuke ; Hosokawa, Shigeo ; Tomiyama, Akio
著者名
Aoyama, Shohei
著者ID
A0964
研究者ID
1000060455152
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/profile/ja.e78459b908f278db520e17560c007669.html
著者名
Hayashi, Kosuke
林, 公祐
ハヤシ, コウスケ
所属機関名
工学研究科
著者ID
A0912
研究者ID
1000010252793
著者名
Hosokawa, Shigeo
細川, 茂雄
ホソカワ, シゲオ
所属機関名
大学院工学研究科 機械工学専攻
著者ID
A0901
研究者ID
1000030211402
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/profile/ja.f03eb022a30248d0520e17560c007669.html
著者名
Tomiyama, Akio
冨山, 明男
トミヤマ, アキオ
所属機関名
工学研究科
収録物名
Experimental Thermal and Fluid Science
巻(号)
96
ページ
460-469
出版者
Elsevier
刊行日
2018-09
公開日
2020-10-01
抄録
Aspect ratios of ellipsoidal bubbles in clean and contaminated systems were measured to investigate the effects of surfactant on the bubble aspect ratio. The bubble diameter ranged from 0.80 to 5.8 mm. Air was used for the gas phase and the glycerol-water solutions were used for the liquid phase. The experimental ranges of the Morton number, M, the bubble Reynolds number, Re, the Eötvös number, Eo, the Weber number, We, and the Tadaki number, Ta, were as follows: 10(-7) < M < 10(-3), 3.6×10(-1) < Re < 1.7×10(2), 1.1×10(-1) < Eo < 5.9, 5.0×10(-3) < We < 3.7 and 5.3×10(-2) < Ta < 3.6. Triton X-100 and 1-octanol were used for surfactant. The terminal velocities of bubbles were confirmed to be independent of the surfactant concentration, and therefore, the bubbles were fully-contaminated from the point of view of the terminal velocity. By making use of the aspect ratio data, the applicability of available aspect ratio correlations was examined and an empirical correlation was proposed. The applicability of the proposed correlation was also examined for sodium dodecyl sulphate (SDS) and 1-decanol. As a result, the following conclusions were obtained: (1) the aspect ratio database, which is of use for validating and developing shape correlations, was obtained, (2) the available aspect ratio correlations are not applicable to the present data for fully-contaminated ellipsoidal bubbles, (3) the aspect ratios are well correlated in terms of a combination of the Eötvös and bubble Reynolds numbers, which proves that all the relevant forces, i.e. the viscous, inertial, buoyant and surface tension forces, should be taken into account to correlate bubble shapes, and (4) the empirical correlation of the aspect ratio developed by using the Triton X-100 and 1-octanol data also gives good evaluations for bubbles contaminated with SDS and 1-decanol in spite of largely different adsorption-desorption characteristics.
キーワード
Contaminated bubble
Aspect ratio
Surfactant
Correlation
カテゴリ
工学研究科
学術雑誌論文
権利
© 2018 Elsevier.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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資源タイプ
journal article
言語
English (英語)
ISSN
0894-1777
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eISSN
1879-2286
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関連情報
DOI
https://doi.org/10.1016/j.expthermflusci.2018.03.015
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