Yang Jun-Yu, Dai Xiao-Ye, Xu Qiang-Hui, Liu Zhi-Ying, Shi Lin, Long Wei
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China.
Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China and iCore Group Inc., Shenzhen 518057, China.
Phys Rev E. 2021 Jul;104(1-2):015307. doi: 10.1103/PhysRevE.104.015307.
In the present study, a numerical model based on the lattice Boltzmann method (LBM) is proposed to simulate multiphase mass transfer, referred to as the CST-LB model. This model introduced continuum species transfer (CST) formulation by an additional collision term to model the mass transfer across the multiphase interface. The boundary condition treatment of this model is also discussed. In order to verify the applicability, the CST-LB model is combined with the pseudopotential multiphase model to simulate a series of benchmark cases, including concentration jump near the interface, gas dissolution in a closed system, species transport during drainage in a capillary tube, and multiphase species transport in the porous media. This CST-LB model can also be coupled with other multiphase LBMs since the model depends on the phase fraction field, which is not explicitly limited to specified multiphase models.
在本研究中，提出了一种基于格子玻尔兹曼方法（LBM）的数值模型来模拟多相传质，称为CST-LB模型。该模型通过一个附加的碰撞项引入连续介质物种传递（CST）公式，以模拟跨多相界面的传质。还讨论了该模型的边界条件处理。为了验证其适用性，将CST-LB模型与伪势多相模型相结合，模拟了一系列基准案例，包括界面附近的浓度跃变、封闭系统中的气体溶解、毛细管排水过程中的物种传输以及多孔介质中的多相物种传输。由于该模型依赖于相分数场，因此该CST-LB模型也可以与其他多相LBM耦合，这并不明确限于特定的多相模型。
