We present a numerical method for interface-resolved simulations of evaporating two-fluid flows based on the volume-of-fluid (VoF) method. The method has been implemented in an efficient FFT-based two-fluid Navier-Stokes solver, using an algebraic VoF method for the interface representation, and extended with the transport equations of thermal energy and vaporized liquid mass for the single-component evaporating liquid in an inert gas. The conservation of vaporizing liquid and computation of the interfacial mass flux are performed with the aid of a reconstructed signed-distance field, which enables the use of well-established methods for phase change solvers based on level-set methods. The interface velocity is computed with a novel approach that ensures accurate mass conservation, by constructing a divergence-free extension of the liquid velocity field onto the entire domain. The resulting approach does not depend on the type of interface reconstruction (i.e. can be employed in both algebraic and geometrical VoF methods). We extensively verified and validated the overall method against several benchmark cases, and demonstrated its excellent mass conservation and good overall performance for simulating evaporating two-fluid flows in two and three dimensions.

我们提出了一种基于流体体积（VoF）方法的蒸发两流体流界面解析模拟的数值方法。该方法已在基于FFT的高效两流体Navier-Stokes求解器中实现，使用代数VoF方法进行界面表示，并扩展了单组分蒸发液体中热能和蒸发液体质量的传输方程。惰性气体。汽化液体的保存和界面质量通量的计算是在重构的有符号距离场的帮助下进行的，这使得可以使用基于水平集方法的成熟的相变求解器方法。界面速度采用新颖的方法进行计算，可确保精确的质量守恒，通过在整个域上构造液体速度场的无散度扩展。所得方法不依赖于界面重建的类型（即可以在代数和几何VoF方法中使用）。我们针对几个基准案例对整体方法进行了广泛的验证和验证，并展示了其出色的质量守恒性和良好的整体性能，可在二维和三维中模拟蒸发的双流体流动。