For interface-tracking simulation of two-phase flows in various micro-fluidics devices, the applicability of two versions of Navier-Stokes phase-field method (NS-PFM) was examined, combining NS equations for a continuous fluid with a diffuse-interface model based on the van der Waals-Cahn-Hilliard free-energy theory. Through the numerical simulations, the following major findings were obtained: (1) The first version of NS-PFM gives good predictions of interfacial shapes and motions in an incompressible, isothermal two-phase fluid with high density ratio on solid surface with heterogeneous wettability. (2) The second version successfully captures liquid-vapor motions with heat and mass transfer across interfaces in phase change of a non-ideal fluid around the critical point.
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机译：为了对各种微流体设备中的两相流进行界面跟踪仿真，研究了两种版本的Navier-Stokes相场方法（NS-PFM）的适用性，将具有连续界面的NS方程与扩散界面相结合van der Waals-Cahn-Hilliard自由能理论的模型。通过数值模拟，得出以下主要发现：（1）NS-PFM的第一个版本很好地预测了固体表面上具有高密度比且具有非均质润湿性的不可压缩等温两相流体的界面形状和运动。 （2）第二个版本成功地捕获了在临界点附近的非理想流体的相变过程中，通过界面传热和传质的液体-蒸汽运动。
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