Periodic Mixing Performance in a Square Cavity for Different Frequencies
Based on vortex-velocity method, the control equations of laminar flow of high vicious fluid in a square cavity driven by the continuous periodic vibration motion of upper and bottom lids are derived. And then the numerical solution of the transient velocity field which is based on the superposition method is obtained by using the finite volume method. The motion of the passive tracer is numerically integrated by the fourth order adaptive Runge-Kutta scheme. The results show that when the frequency is below 0.1Hz, the mixing is controlled by the globally chaotic mixing. While the frequency increases to between 0.1 Hz and 0.5 Hz, the quasi-periodic islands occur in the region of chaotic motion. After the frequency exceeds 0.5Hz, the mixing degenerates into the regular laminar mixing. Through the contrasts of Poincaré sections, it is proved that the frequency not only has the effect on the scales of KAM islands, but also dominates the mixing transition from the globally chaotic mixing to the traditionally regular laminar mixing.
Fluid mechanics Laminar flow Interface tracking Numerical analysis Nonlinear dynamics
XU Baiping LIU Yuejun QU Jinping
Chemical Engineering Department of Guangdong Industry Technology College, Guangzhou, 510300, Guangdo Key Laboratory of New Material and Technology for Package, Zhuzhou Institute of Technology, Zhuzhou, The National Engineering Research Center of Novel Equipment for Polymer Processing, The Key Laborato
国际会议
2009 Advanced Polymer Processing(Qingdao)Intl Forum(2009高分子材料先进制造业(青岛)国际论坛
青岛
英文
529-535
2009-08-19（万方平台首次上网日期，不代表论文的发表时间）