Lattice Boltzmann simulation of asymptotic longitudinal mass dispersion in reconstructed random porous media
Lattice Boltzmann simulation of asymptotic longitudinal mass dispersion in reconstructed random porous media
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重构随机多孔介质中渐近纵向质量色散的格子玻尔兹曼模拟
DOI：
10.1002/aic.16088
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发表时间：
--
期刊：
影响因子：
3.7
通讯作者：
Ting Qiu
中科院分区：
文献类型：
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作者：
Chen Yang;Yixiong Lin;Gerald Debenest;Akira Nakayama;Ting Qiu
为研究多孔介质的宏观质量输运特性，采用格子玻尔兹曼方法（LBM）计算了多孔介质的纵向质量弥散。在这项研究中，选择了一个具有多松弛时间（MRT）碰撞算子的D2 Q9模型，该模型适用于具有高Péclet数的不可压缩流，而无需细化晶格。针对多孔介质的微观结构，采用随机放置（RP）方法获得随机放置的颗粒。基于已有的数值计算结果，建立了一个新的纵向质量弥散关联式。通过与文献中的实验数据进行比较，合理的协议，观察到在很宽的孔隙率范围从0.3到0.7，表明建议的关联式的有效性。© 2018美国化学工程师学会AIChE J，64：2770-2780，2018
To research macroscopic mass transport characteristics of porous media, a lattice Boltzmann method (LBM) approach was utilized to calculate asymptotic longitudinal mass dispersion. In this study, a D2Q9 model with multi‐relaxation‐time (MRT) collision operator, which is appropriate for incompressible flow with a high Péclet number without refining the lattice, was chosen. With respect to the microstructure of porous media, random placement (RP) method was applied to obtain randomly positioned particles. Based on the exhausted numerical results presented in the study, a new correlation of longitudinal mass dispersion was established. By comparing with available experimental data in the literature, reasonable agreements are observed in a wide porosity range from 0.3 to 0.7, indicating the validity of the proposed correlation. © 2018 American Institute of Chemical EngineersAIChE J, 64: 2770–2780, 2018