日本機械学会論文集B編
Online ISSN : 1884-8346
一般論文
過渡的気泡変形を伴う分散気泡流れの実効粘度変化
桜井 康介田坂 裕司村井 祐一
著者情報
ジャーナル フリー

79 巻 (2013) 797 号 p. 1-11

詳細
PDFをダウンロード (1377K) 発行機関連絡先
抄録

A new approach to deduce the effective viscosity of bubbly liquid with considering non-equilibrium bubble deformations in transient shear flows was proposed. Simultaneous measurement of the bubble shape and the spatio-temporal velocity distribution clarified that bubble deformation has delay from a variation of the local Capillary number under a transient process of flows from a stationary state to a rigid body rotation (spin-up) in a rotating cylinder. Relative viscosity of the bubbly liquid against the single phase condition estimated by the proposed method shows 60 % increase as the maximum. Such large increase of the effective viscosity cannot be introduced by mixture of spherical bubbles and bubbles with equilibrium deformations, and thus the non-equilibrium bubble deformations take a primary role on the modification of the effective viscosity in unsteady shear flows.

著者関連情報
© 2013 一般社団法人 日本機械学会
次の記事
feedback
Top