Pore-scale investigation on the effect of gas-liquid phase separation on reactive flow in a horizontal rough fracture using the lattice Boltzmann method
Pore-scale investigation on the effect of gas-liquid phase separation on reactive flow in a horizontal rough fracture using the lattice Boltzmann method
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DOI：
10.1016/j.ces.2021.116483
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发表时间：
2021-06
影响因子：
4.7
通讯作者：
Da Zhang;Sufen Li;Yan Li
中科院分区：
文献类型：
--
作者：
Da Zhang;Sufen Li;Yan Li
本文采用晶格玻尔兹曼（LB）方法在孔隙尺度上研究了海水沸腾引起的气液相分离对碳酸盐裂纹溶解过程的影响。含相变、传热和溶质输运的气液两相流分别用单组分多相LB模型、热LB模型和质输运LB模型来描述。此外，通过体积像素法计算溶解固体质量。主要结论如下：相分离对溶蚀有不利影响，特别是在裂纹的上边界。随着入口速度的增加和裂缝宽度的减小，这种负面影响会增强，而润湿性对溶蚀的影响是非线性的，其影响程度取决于两相的相分布。此外，段塞流极大地阻碍了溶质的运输，但可能加速入口附近的溶解反应。
In this study, the effect of the gas-liquid phase separation caused by seawater boiling on the carbonate crack dissolution process was investigated using the lattice Boltzmann (LB) method at the pore scale. The gas-liquid two-phase flow with phase change, heat transfer, and solute transport is described by a single-component multiphase LB model, thermal LB model, and mass transport LB model, respectively. In addition, the dissolved solid mass is calculated via the Volume of Pixel method. The main conclusions are as follows: the phase separation negatively affects dissolution, especially in the upper boundary of the crack. Moreover, the negative effect is strengthened with the increase in inlet velocity and the decrease in crack width while the influence of wettability on dissolution is non-linear and its degree depends on the phase distribution of the two phases. In addition, slug flow greatly hinders solute transport but may accelerate the dissolution reaction near the inlet.