摘要
该文研究了长高比为Γ?12,20情况下行波对流中缺陷的特性。对于混合流体分离比ψ?-0.6,长高比Γ?20的情况,有缺陷的行波对流稳定存在于相对瑞利数r∈(2.224,3.6]的范围。在有缺陷的行波对流存在的上限附近,随着r的增大,缺陷发生的周期迅速增大。对于不同的分离比,对于ψ?-0.2的情况,Γ?12时有缺陷的行波存在的相对瑞利数范围比Γ?20时的范围小;对于ψ?-0.4的情况,Γ?12时有缺陷的行波存在的相对瑞利数范围与Γ?20时的范围相当,但存在区间的上下限前移较大;对于ψ?-0.6的情况,Γ?12时有缺陷的行波存在的相对瑞利数范围与Γ?20时的范围相当,但存在区间的上下限稍微前移。因此,长高比对有缺陷的行波有明显的影响。
In this paper, the characteristics of defects in the traveling wave convection in binary fluid mixture with the aspectratios( Γ?12,20) are studied. For the separation ratio ψ?-0.6 and Γ?20, traveling wave convection with defects exists in astable range of reduced Rayleigh number r ∈(2.224, 3.6]. Near its upper limit,the period of defects increases rapidly with theincrease of r.For different separation ratios, such as ψ?-0.2, the r range of the existence of the traveling wave convectionwith defects at Γ?12 is smaller than that at Γ?20;For ψ?-0.4, the r range of the existence of the traveling waveconvection with defects at Γ?12 is almost the same as that at Γ?20, but the lower and upper limits of the existence of thetraveling wave convection with defects move much forward;For ψ?-0.6,the r range of the existence of the traveling waveconvection with defects at Γ?12 is also almost the same as that at Γ?20, but its lower and upper limits move slightly forward.Therefore, the aspect ratio has a significant effect on the traveling wave with defects.
作者
宁利中
徐泊冰
宁碧波
袁喆
田伟利
NING Li-zhong;XU Bo-bing;NING Bi-bo;YUAN Zhe;TIAN Wei-li(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;College of Civil Engineering and Architecture,Jiaxing University,Jiaxing 314001,Zhejiang,China;China Water Resources Pearl River Planning Surveying&Designing Co.Ltd,510610,Guangdong,China;Department of Architecture,Shanghai University,Shanghai 200444,China)
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2019年第1期93-98,共6页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金项目(10872164)
省部共建西北旱区生态水利国家重点实验室基金项目(2017ZZKT-2)~~
关键词
长高比
缺陷
行波
周期
数值模拟
混合流体
aspect ratio
defect
traveling wave
period
numerical simulation
binary fluid mixture
