An integrated Lattice-Boltzmann model of immiscible two-phase flow and bulk mass transfer with Marangoni effect
An integrated Lattice-Boltzmann model of immiscible two-phase flow and bulk mass transfer with Marangoni effect
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DOI：
10.1016/j.jcp.2023.112037
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
H. Mo;Y. Yong;K. Yu;Wenqiang Chen;Jialin Dai;Chao Yang
中科院分区：
文献类型：
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作者：
H. Mo;Y. Yong;K. Yu;Wenqiang Chen;Jialin Dai;Chao Yang
微尺度反应性不相容多相流经常发生在微型固定床等小型化学反应器中，但同时求解多孔填料介质中的流体力学、传质和反应行为却是一个巨大的挑战。基于相场理论和修正的Fick传质定律，建立了考虑化学反应和Marangoni效应的多组分多相格子-玻尔兹曼模型。对于反应性两相流体，解决了本体均相反应和流固界面非均相反应。改进了笛卡儿网格中的曲线边界处理方法，使之能够描述LB框架下的非均相反应。对所建立的数学模型分别进行了验证，结果与解析解吻合较好。然后，我们将我们的新模型应用于微结构反应衬底中的涡旋流场。数值结果表明，该模型能够较好地模拟微结构多孔介质中的反应性多相流动，为今后的工业应用提供了有力的依据。
The microscale reactive immiscible multiphase flow often happens for the miniaturized chemical reactor such as micro fixed-bed-reactor, but it is significantly challenging in solving concurrently hydrodynamic, mass transfer and reaction behaviors in the porous packing media. Based on the phase-field (PF) and the revised Fick's law mass transfer approaches, a new multicomponent-multiphase Lattice-Boltzmann (LB) model with chemical reaction and the Marangoni effect was built up. Both the bulk homogeneous and fluid-solid interface heterogeneous reactions were resolved for the reactive two-phase fluid. The curved boundary treatment in Cartesian grids was upgraded to describe the heterogeneous reaction in the LB framework. Those mathematical models were validated respectively and showed good agreement with the analytical solutions. Then we applied our new models in the vortex flow field in a micro-structured reactive substrate. The numerical results showed that the newly developed LB model is able to simulate reactive multiphase flow in micro-structured porous media, which can provide a strong basis for future industrial applications.