Flow transition in surface switching of rotating fluid
作者： Makoto Iima , Yuji Tasaka , Kentaro Ito
DOI:
关键词: Turbulence 、 Flow (psychology) 、 Intensity (heat transfer) 、 Surface (mathematics) 、 Mechanics 、 Classical mechanics 、 Free surface 、 Materials science 、 Laminar flow 、 Bifurcation diagram 、 Hysteresis
摘要: We study ‘surface switching’ quantitatively in flows driven by the constant rotationof endwall of an open cylindrical vessel reported Suzuki, Iima & Hayase(Phys. Fluids, vol. 18, 2006, p. 101701): deformed free surface switches betweenaxisymmetric and non-axisymmetric shapes accompanied irregular verticaloscillation. Detailed simultaneous measurements showed that magnitude thevelocity fluctuations (turbulent intensity) temporally varies greatly are stronglycorrelated with height, suggesting dynamic switching between laminarand turbulent states is vessel-scale shape changes. The studyalso identified clear hysteresis intensity arising from changes theReynolds number; bifurcation diagram consists two overlapping branchesrepresenting a high-intensity (turbulent) state low-intensity (laminar) state.Based on results, mechanism suggested.
harvard.edu参考文章(18)
Y. Tasaka, K. Ito, M. Iima, Visualization of a Rotating Flow under Large-Deformed Free Surface Using Anisotropic Flakes Journal of Visualization. ,vol. 11, pp. 163- 172 ,(2008) , 10.1007/BF03181931
Takashi Mashiko, Yoshiyuki Tsuji, Takatoshi Mizuno, Masaki Sano, Instantaneous measurement of velocity fields in developed thermal turbulence in mercury Physical Review E. ,vol. 69, pp. 036306- ,(2004) , 10.1103/PHYSREVE.69.036306
Björn Hof, Jerry Westerweel, Tobias M. Schneider, Bruno Eckhardt, Finite lifetime of turbulence in shear flows Nature. ,vol. 443, pp. 59- 62 ,(2006) , 10.1038/NATURE05089
On the stability of three-dimensional boundary layers with application to the flow due to a rotating disk Philosophical Transactions of the Royal Society A. ,vol. 248, pp. 155- 199 ,(1955) , 10.1098/RSTA.1955.0013
Yuji Tasaka, Seiji Kon, Lionel Schouveiler, Patrice Le Gal, Hysteretic mode exchange in the wake of two circular cylinders in tandem Physics of Fluids. ,vol. 18, pp. 084104- ,(2006) , 10.1063/1.2227045
Eric I. Corwin, Granular flow in a rapidly rotated system with fixed walls. Physical Review E. ,vol. 77, pp. 031308- ,(2008) , 10.1103/PHYSREVE.77.031308
Toshiyuki Suzuki, Makoto Iima, Yumino Hayase, Surface switching of rotating fluid in a cylinder Physics of Fluids. ,vol. 18, pp. 101701- ,(2006) , 10.1063/1.2359740
A. E. Perry, T. T. Lim, E. W. Teh, A visual study of turbulent spots Journal of Fluid Mechanics. ,vol. 104, pp. 387- 405 ,(1981) , 10.1017/S0022112081002966
A. Cros, P. Le Gal, Spatiotemporal intermittency in the torsional Couette flow between a rotating and a stationary disk Physics of Fluids. ,vol. 14, pp. 3755- 3765 ,(2002) , 10.1063/1.1508796
Victor Shatrov, Gunter Gerbeth, Regina Hermann, An Alternating Magnetic Field Driven Flow in a Spinning Cylindrical Container Journal of Fluids Engineering-transactions of The Asme. ,vol. 130, pp. 071201- ,(2008) , 10.1115/1.2948374