A PERIODICALLY LOCALIZED TRAVELING WAVE STATE OF BINARY FLUID CONVECTION WITH HORIZONTAL FLOWS  

作　　者：NING Li-zhong QI Xin HARADA Yoshifumi YAHATA Hideo 

机构地区：[1]Institute of Hydraulic Engineering, Xi＇an University of Technology, Xi＇an 710048, China [2]Department of Applied Physics, Faculty of Engineering, Fukui University, Bunkyo 3-9-11, Fukui 910, Japan [3]Department of Materials Science, Faculty of Science, Hiroshima University, Higashi-Hiroshima 739, Japan

出　　处：《Journal of Hydrodynamics》2006年第2期199-205,共7页水动力学研究与进展B辑（英文版）

基　　金：Project supported by SRF for ROCS, SEM(Grant No:220542), the Specific Fund of Higher Educational Doctoral Programme of Xi’an University of Technology (Grant No:220327) and the Key Project of Shaanxi Education Committee(Grant No:05JK271).

摘　　要：In this paper, the convection structure in a rectangular channel with a horizontal flow was studied for the aspect ratio ГA=12 and the separation ratio ψ=-0.11. Our simulations were preformed by solving the hydrodynamic equations using the SIMPLE method. In the system of binary fluid convection with a horizontal flow, a Periodically Localized Traveling Wave （PLTW） state was found. It has similar behavior to classical Rayleigh-Benard convection in a binary fluid mixture, but the region and wave number of convection change periodically with time. The instability of PLTW depends on the Rayleigh number r and the intensity of horizontal flows Re for given ψ. Thus, the PLTW convection results from the competition between the horizontal flow and the counter-propagating wave near the onset of convection.In this paper, the convection structure in a rectangular channel with a horizontal flow was studied for the aspect ratio ГA=12 and the separation ratio ψ=-0.11. Our simulations were preformed by solving the hydrodynamic equations using the SIMPLE method. In the system of binary fluid convection with a horizontal flow, a Periodically Localized Traveling Wave （PLTW） state was found. It has similar behavior to classical Rayleigh-Benard convection in a binary fluid mixture, but the region and wave number of convection change periodically with time. The instability of PLTW depends on the Rayleigh number r and the intensity of horizontal flows Re for given ψ. Thus, the PLTW convection results from the competition between the horizontal flow and the counter-propagating wave near the onset of convection.

关 键 词：CONVECTION horizontal flow periodicity localized traveling wave state 

分 类 号：O35[理学—流体力学]