Numerical Computation of Apex Angle Effects on Taylor Vortices in Rotating Conical Cylinders Systems

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Mohamed Nabil Noui-Mehidi¹  Naoto Ohmura¹  Kunio Kataoka¹ 

[1] Department of Chemical Science and Engineering, Kobe University

关键词: Conical Cylinders;    Taylor-Vortex Flow;    Numerical Simulations;    Coordinate Transformation;    SMAC Method;   

DOI  :  10.1252/jcej.35.22

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Cited-By(5)The occurrence of Taylor vortices between two conical cylinders of the inner one rotating and the outer one at rest is numerically simulated by the integration of time-dependent Navier-Stokes equations of the primitive variables. The motion is initiated by a progressive acceleration following a linear path of the inner conical cylinder rotation from the state of rest until its final rotation speed. In the integrated equations, the use of a coordinate transformation permitted to point out the apex angle α in the circular coordinates system and then to study the effects of α on the transient development of the Taylor-vortex structures, the steady states and the flow field characteristics. The numerical calculations have been achieved by the use of the SMAC method applied to a finite difference scheme for the case of a finite length. As a result, the symmetry of the Taylor vortices formed with regard to the mid plane for α = 0 does not exist anymore when the apex angle α becomes greater. The study of the flow field details showed that the contribution of the centrifugal forces becomes more important for increasing α due to the increase of the azimuthal component.

【 授权许可】

Unknown