Mixing-Effective Motion of High Viscosity Fluid Around a Rotating Elliptic Cylinder

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Naoto Ohmura²  Teiji Takigawa¹  Haruhiko Ema¹  Tokuo Yoshimura²  Kunio Kataoka² 

[1] Division of Resource and Energy Science, Graduate School of Science and Technology, Kobe University;Department of Chemical Science and Engineering, Kobe University

关键词: Rotating Elliptic Cylinder;    Chaotic Mixing;    High Viscosity Fluid;    Direct Numerical Simulation;   

DOI  :  10.1252/jcej.33.420

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Mixing-effective motions are both numerically and experimentally studied for a very viscous fluid around a rotating elliptic cylinder installed in a cylindrical vessel. A two-dimensional direct numerical simulation was conducted in an elliptic boundary-fitted curvilinear coordinate system rotating at the same angular velocity as the elliptic cylinder. Time-dependent streamlines and streaklines were observed with the aid of visualization technique. It is found that a mixing-effective (folding) motion actually occurs in the vicinity of the edges of the elliptic cylinder, and that such a motion may result from the unstableness of hyperbolic fixed points on an integrable two-dimensional heteroclinic orbit due to experimentally unavoidable three-dimensional disturbances.

【 授权许可】

Unknown