论文标题
可压缩的非理想流体的动力学模拟：从超临界流到相变和外来行为
Kinetic Simulations of Compressible Non-Ideal Fluids: From Supercritical Flows to Phase-Change and Exotic Behavior
论文作者
论文摘要
我们研究了可压缩非理想液的动力学模型[doi：10.1103/physreve.102.020103]。该模型通过重新限制颗粒速度施加了局部热力学压力，这既是长期和短距离效应，从而构成了完全热力学的一致性。该模型是完全瓦利亚的不变性，并将质量，动量和能量视为局部保护法。流体动力学极限的分析和推导通过基准模拟评估准确性和鲁棒性，从Joule-Thompson效应到相位变化和高速流。特别是，我们显示了范德华气体的反转线的直接模拟，然后显示了相变的模拟，例如对饱和液体，成核和膜沸腾的一维蒸发，最终，我们研究了两种不同流体介质中扰动强的冲击阵线的稳定性。在所有情况下，我们都与相应的理论分析和实验相关性都发现非常吻合。我们表明，我们的模型可以在整个相图中运行，包括超级和亚临界机制，并固有地捕获相变现象。
We investigate a kinetic model for compressible non-ideal fluids [DOI:10.1103/PhysRevE.102.020103]. The model imposes the local thermodynamic pressure through a rescaling of the particles velocities, which accounts for both long- and short-range effects and hence full thermodynamic consistency. The model is fully Galilean invariant and treats mass, momentum and energy as local conservation laws. The analysis and derivation of the hydrodynamic limit is followed by the assessment of accuracy and robustness through benchmark simulations ranging from Joule-Thompson effect to a phase-change and high-speed flows. In particular, we show the direct simulation of the inversion line of a van der Waals gas followed by simulations of phase-change such as the one-dimensional evaporation of a saturated liquid, nucleate and film boiling and eventually,we investigate the stability of a perturbed strong shock front in two different fluid mediums. In all of the cases, we find excellent agreement with the corresponding theoretical analysis and experimental correlations. We show that our model can operate in the entire phase diagram, including super- as well as sub-critical regimes and inherently captures phase-change phenomena.
