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基于格子Boltzmann方法的复杂多孔介质内双扩散效应的对流传热传质机理研究 被引量:5

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摘要 基于TD2G9不可压格子Boltzmann模型,通过引入第3个分布函数表征浓度场的演化,并在标准演化方程后附加源项,构造了用于模拟多孔介质内在多物理场(浓度场,温度场)下交叉耦合效应的自然对流传热传质格子Boltzmann模型.基于非平衡态不可逆热力学的基本原理,引入Boussmesq假设,在考虑了耦合扩散效应的基础上建立了可用于描述多物理场耦合效应下的自然对流传热传质的控制方程.采用提出的格子Boltzmann模型结合多孔介质构造算法从孔隙尺度对规则以及随机多孔介质内双扩散效应的自然对流传热传质过程进行了模拟,研究了不同瑞利数Ra,不同孔隙率下的多孔介质内传热传质特征,考察了温度梯度等因素对多孔介质内传质过程的影响,创新地从孔隙尺度对多孔介质内的耦合对流扩散过程的传热传质机理进行了研究.
出处 《科学通报》 EI CAS CSCD 北大核心 2010年第1期94-102,共9页 Chinese Science Bulletin
基金 国家自然科学基金资助项目(批准号:50478012,50725620).致谢 作者在此对Dr.Wang在QSGS方面给与的有益讨论表示感谢,同时对Prof.Y.P.Zhang和Dr.X.J.Ying在多孔介质传质方面提供的宝贵意见表示感谢.
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共引文献40

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