単一気泡の形状と定常抗力

• 佐藤 文香

  九州大学大学院工学府

• 城田 農

  産業総合技術研究所

• 真田 俊之

  静岡大学工学部

• 渡部 正夫

  九州大学大学院工学研究院

書誌事項

タイトル別名

• Shape and Steady Drag on Single Rising Bubbles
• タンイツ キホウ ノ ケイジョウ ト テイジョウ コウリョク

抄録

Relations between drag coefficients C_D and bubble shapes are investigated by comparing our experimental results with both analytical [Moore, J. Fluid Mech., 23, 749-766 (1965)] and numerical results [Blanco & Magnaudet, Phys. Fluids, 7(6), 1265-1274(1995)] on ellipsoidal bubbles rising in a quiescent clean liquid. We clarify that the analytically obtained C_D overestimates the experimental results especially in the case of either high aspect ratio or low Reynolds number, and that numerically obtained results for ellipsoidal bubbles well predict our experimental results. We also show that the effect of the deviation in the shape from the ellipsoid, i.e., fore-aft asymmetry, on C_D is negligible; C_D for fore-aft asymmetry bubbles is in good agreement with the numerically obtained C_D for ellipsoidal bubbles.

収録刊行物

• 混相流研究の進展

  混相流研究の進展 3 35-41, 2008

  日本混相流学会

キーワード

• Clean bubble
• Steady drag
• Bubble shape
• High <I>Re</I>
• Low <I>Mo</I>
• Fore-aft asymmetry

詳細情報

• CRID: 1390001205274661120
• NII論文ID: 10021154319
• NII書誌ID: AA12204080
• DOI: 10.3811/pmfr.3.35
• ISSN: 18816088
• ISSN: 18815804
• NDL書誌ID: 9553787
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9553787
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可