双组分混合流体中Eckhaus不稳定调谐的行波对流

doi:10.3321/j.issn:1000-3290.2007.08.065

CORC > 北京大学 > 工学院

	双组分混合流体中Eckhaus不稳定调谐的行波对流; Traveling-wave convection with Eckhaus instability modulation in a binary fluid mixture
	李国栋 ; 黄永念
刊名	物理学报
	2007
关键词	双组分混合流体行波对流时空位错缺陷 Eckhaus不稳定调谐 binary fluid mixture traveling-wave convection spatiotemporal dislocation defects Eckhaus instability modulation
DOI	10.3321/j.issn:1000-3290.2007.08.065
英文摘要	在双组分混合流体的Rayleigh-B啨nard对流系统中,数值模拟获得了周期性时空位错缺陷调谐的扩展行进波对流状态.研究了该状态的时空演化特性.结果表明,Eckhaus不稳定触发的对流涡卷对的产生是调谐的起源,对流涡卷在边界处生成与湮没频率的不同,又使系统返回不稳定区域,系统在稳定与不稳定的波数之间振荡.还探讨了一个周期内传热与混合特性的改变及其控制参数的变化规律.; For Rayleigh-Benard convection in a binary fluid mixture, we obtained a traveling-wave state with periodic modulation of spatiotemporal dislocation defects in a rectangular cell by the numerical simulation of full hydrodynamic equations. The investigations show that the creation of pairs of convective rolls triggered by Eckhaus instability leading to this modulation. Because the generating frequencies of rolls at the left wall smaller than the annihilating frequencies of rolls at the right wall, the system soon move out of the stable region, in this way the system oscillates back and forth between the stable and unstable Echkaus wave number band. The properties of heat transfer and fluid mixing also studied too.; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 08; 4742-4748; 56
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/221665]
专题	工学院
推荐引用方式 GB/T 7714	李国栋,黄永念. 双组分混合流体中Eckhaus不稳定调谐的行波对流, Traveling-wave convection with Eckhaus instability modulation in a binary fluid mixture[J]. 物理学报,2007.
APA	李国栋,&黄永念.(2007).双组分混合流体中Eckhaus不稳定调谐的行波对流.物理学报.
MLA	李国栋,et al."双组分混合流体中Eckhaus不稳定调谐的行波对流".物理学报 (2007).