| 双流体Rayleigh—Benard对流中的局部行波 |
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| 引用本文： | 宁利中,袁喆,郝建武,李国栋.双流体Rayleigh—Benard对流中的局部行波[J].应用力学学报,2011,28(6). |
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| 作者姓名： | 宁利中 袁喆 郝建武 李国栋 |
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| 作者单位： | 1. 西安理工大学,西安,710048
2. 西安理工大学,西安710048／中水珠江规划勘测设计有限公司,广州510610 |
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| 基金项目： | 国家自然科学基金(10872164); 陕西省教育厅专项计划(09JK643); 陕西省重点学科建设专项 |
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| 摘 要： | Rayleigh-Benard对流是研究非平衡对流的斑图（Pattem）及非线性动力学特性的典型模型之一。据此，通过流体力学基本方程组的数值模拟，探讨了分离比沙-0．4时双流体局部行波的形成过程；讨论了双流体局部行波流速场、温度场、浓度场、平均浓度流的结构和特性，分析了局部行波被局部化的原因。研究结果表明：局部行波始终在背离端壁方向传播并被限定在此端，它存在于腔体左端还是右端取决于经过过渡后对传波中最终控制腔体的一支行波的传播方向；在局部行波的存在范围内（1．519≤r≤1．604），随相对瑞利数增加，衡量对流振幅的最大垂直流速、特征通过流体层的垂直热流量的努塞尔数、局部行波宽度等都在增加，但反映浓度特性的混合参数减小。
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| 关 键 词： | 双流体 Rayleigh—Benard对流 局部行进波 Soret效应 |
Localized travelling wave of Rayleigh-Benard convection in a binary fluid mixture |
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| Ning Lizhong Yuan Zhe, Hao Jianwu Li Guodong.Localized travelling wave of Rayleigh-Benard convection in a binary fluid mixture[J].Chinese Journal of Applied Mechanics,2011,28(6). |
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| Authors: | Ning Lizhong Yuan Zhe Hao Jianwu Li Guodong |
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| Institution: | Ning Lizhong1 Yuan Zhe1,2 Hao Jianwu1 Li Guodong1(Institute of Water Resources and Hydro-electric Engineering,Xi'an University of Technology,710048,Xi'an,China) 1(China Water Resources Pearl River Planning Surveying & Designing Co.Ltd,510610,Guangzhou,China) 2 |
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| Abstract: | The Rayleigh-Benard convection is one of typical models for studying the patterns and nonlinear dynamics of nonequilibrium convection.By using the numerical simulations of the two-dimensional full equations of hydrodynamics,the formation process of the localized traveling wave(LTW) convection in a binary fluid mixture for the separation ratio equals to-0.4 is studied.The result shows that the LTW propagates all along to the direction leaving the end wall and is confined near that end.The LTW exists to left ... |
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| Keywords: | binary fluid mixture Rayleigh-Benard convection localized traveling wave Soret effect |
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