Three-dimensional analysis of spreading and mixing of miscible compound in heterogeneous variable-aperture fracture
Three-dimensional analysis of spreading and mixing of miscible compound in heterogeneous variable-aperture fracture
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异质变孔径裂缝中混相化合物扩散混合三维分析
DOI：
10.1016/j.wse.2017.01.007
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发表时间：
2016-10
影响因子：
4
通讯作者：
Wang J.-G.
中科院分区：
文献类型：
--
作者：
Dou Z.;Zhou Z.-F.;Wang J.-G.
作为传质机制，可混溶污染物的扩散和混合(稀释)过程是理解反应传质行为和横向弥散的基础。本文用耦合格子Boltzmann方法(LBM)模拟了混相污染化合物在三维自仿射粗糙裂隙中的扩展和稀释过程。分别用矩分析和Shannon熵(稀释指数)分析了扩散和混合过程。相应的结果表明，由于孔径分布的不均匀，扩散过程是各向异性的。由于优先流的存在，化合物在大孔口区的传输速度比在小孔口区的快。扩散和混合过程都高度依赖于流体的流动速度和分子扩散。稀释指数的计算结果表明，流体流速越大，分子扩散系数越大，稀释指数的增长率越大。
As mass transport mechanisms, the spreading and mixing (dilution) processes of miscible contaminated compounds are fundamental to understanding reactive transport behaviors and transverse dispersion. In this study, the spreading and dilution processes of a miscible contaminated compound in a three-dimensional self-affine rough fracture were simulated with the coupled lattice Boltzmann method (LBM). Moment analysis and the Shannon entropy (dilution index) were employed to analyze the spreading and mixing processes, respectively. The corresponding results showed that the spreading process was anisotropic due to the heterogeneous aperture distribution. A compound was transported faster in a large aperture region than in a small aperture region due to the occurrence of preferential flow. Both the spreading and mixing processes were highly dependent on the fluid flow velocity and molecular diffusion. The calculated results of the dilution index showed that increasing the fluid flow velocity and molecular diffusion coefficient led to a higher increasing rate of the dilution index.
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影响因子：
3.6
作者：
M. Rolle;C. Eberhardt;G. Chiogna;O. Cirpka;P. Grathwohl
通讯作者：
M. Rolle;C. Eberhardt;G. Chiogna;O. Cirpka;P. Grathwohl
影响因子：
5.4
作者：
O. Cirpka;G. Chiogna;M. Rolle;A. Bellin
通讯作者：
O. Cirpka;G. Chiogna;M. Rolle;A. Bellin
影响因子：
3.2
作者：
Jiazhong Qian;Lei Ma;Hongbin Zhan;Q. Luo;Xiao Wang;Mu Wang
通讯作者：
Jiazhong Qian;Lei Ma;Hongbin Zhan;Q. Luo;Xiao Wang;Mu Wang
影响因子：
5.4
作者：
P. Mondal;B. Sleep
通讯作者：
P. Mondal;B. Sleep
影响因子：
4.7
作者：
D. L. Hochstetler;M. Rolle;G. Chiogna;C. Haberer;P. Grathwohl;P. Kitanidis
通讯作者：
D. L. Hochstetler;M. Rolle;G. Chiogna;C. Haberer;P. Grathwohl;P. Kitanidis