论文标题
带有尖锐界面的无粘性液体蒸气流的分子 - 孔子多尺度模型
A Molecular-Continuum Multiscale Model for Inviscid Liquid-Vapor Flow with Sharp Interfaces
论文作者
论文摘要
可压缩液体蒸气流的动力学取决于相边界处的微观行为。我们考虑了一种尖锐的接口方法，并提出了一个多尺度模型，以准确描述液体蒸气流，而无需在连续尺度上施加临时闭合关系。多尺度模型将连续尺度的Euler方程与控制界面运动的分子规模粒子模拟相结合。我们依靠一个具有接口的移动网格有限体积方法来以保守的方式离散连续尺度的尖端流量。计算效率虽然保留了物理性能，但它是通过基于约束感知的神经网络的界面动力学来实现的。多尺度模型以其一般形式呈现，并应用于以前尚未访问的温度依赖性液体蒸气流程。
The dynamics of compressible liquid-vapor flow depends sensitively on the microscale behavior at the phase boundary. We consider a sharp-interface approach, and propose a multiscale model to describe liquid-vapor flow accurately, without imposing ad-hoc closure relations on the continuum scale. The multiscale model combines the Euler equations on the continuum scale with molecular-scale particle simulations that govern the interface motion. We rely on an interface-preserving moving mesh finite volume method to discretize the continuum-scale sharp-interface flow in a conservative manner. Computational efficiency, while preserving physical properties, is achieved by a surrogate solver for the interface dynamics based on constraint-aware neural networks. The multiscale model is presented in its general form, and applied to regimes of temperature-dependent liquid-vapor flow which have not been accessible before.
