Theoretical and Experimental Studies of the Deformation of Bubbles Moving in Quiescent Newtonian and Non-Newtonian Liquids

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Takao Tsukada²  Mitsunori Hozawa²  Nobuyuki Imaishi¹  Haruyuki Mikami² 

[1] Institute of Advanced Material Study, Kyushu University;Chemical Research Institute of Non-Aqueous Solutions, Tohoku University

关键词: Bubble;    Deformation;    Terminal Velocity;    Numerical Simulation;    Finite Element Method;   

DOI  :  10.1252/jcej.23.192

来源: Maruzen Company Ltd

【 摘 要 】

References(9)Cited-By(10)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.Numerical analysis by use of the finite element method can predict well the observed shapes and velocities of such bobbles.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.Shape regime maps are proposed on the basis of the numerical simulations.

【 授权许可】

Unknown