Theoretical and experimental studies of the deformation of bubbles moving in quiescent Newtonian and non-Newtonian liquids.
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概要
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Theoretical and experimental studies of the shapes and terminal velocities of bubbles rising in quiescent Newtonian and non-Newtonian liquids were carried out. For non-Newtonian liquids, the power law model was adopted as the constitutive model.<BR>Numerical analysis by use of the finite element method can predict well the observed shapes and velocities of such bobbles.<BR>It is found experimentally and theoretically that as bubble diameter increases, the bubble deforms from a sphere to one of three types of ellipsoids, depending on the viscosity of the continuous phase: (1) more deformed at the front than at the rear, (2) symmetrical front to rear, and (3) more deformed at the rear than at the front, in both Newtonian and non-Newtonian liquids.<BR>Shape regime maps are proposed on the basis of the numerical simulations.
- The Society of Chemical Engineers, Japanの論文
著者
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Imaishi Nobuyuki
Institute Of Advanced Material Study Kyushu University
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HOZAWA MITSUNORI
Chemical Research Institute of Non-Aqueous Solutions, Tohoku Univ.
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Hozawa Mitsunori
Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
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TSUKADA TAKAO
Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
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Mikami Haruyuki
Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
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