德国卡尔斯鲁厄理工学院Huihuang Xia团队报道了有无蒸发的气-液-固多相自由表面流动的计算模型。相关研究成果发表在2023年12月19日出版的《颗粒学报》。

气-液-固多相系统在工程应用中无处不在，例如喷墨打印、喷雾干燥和涂层。开发一个用于模拟这些多相系统的数值框架具有重要意义。

该文中，研究人员开发了一个改进的、解析的CFD-DEM框架来模拟有蒸发和无蒸发的多相自由表面流。研究人员开发了一种改进的毛细管力模型，来计算自由表面部分漂浮颗粒的毛细管相互作用。通过阻力系数计算、单球沉降和两个颗粒的drafting-kissing-tumbling三个著名的基准案例，对解析后的CFD-DEM模型进行了验证。

结果表明，该文开发的解析CFD-DEM模型可以准确地计算流固相互作用，并预测固体颗粒与液相相互作用的轨迹。数值演示，即当液相蒸发时，两个粒子沿着自由表面移动，以及粒子在蒸发的固着液滴内的传输和积聚，显示了解析模型的性能。

附：英文原文

Title: Computational modelling of gas-liquid-solid multiphase free surface flow with and without evaporation

Author:Huihuang Xia，Marc Kamlan

Issue&Volume: 2023/12/19

Abstract: Gas-liquid-solid multiphase systems are ubiquitous in engineering applications, e.g. inkjet printing, spray drying and coating. Developing a numerical framework for modelling these multiphase systems is of great significance. An improved, resolved CFD-DEM framework is developed to model the multiphase free surface flow with and without evaporation. An improved capillary force model is developed to compute the capillary interactions for partially floating particles at a free surface. Three well-known benchmark cases, namely drag coefficient calculation, the single sphere settling, and drafting-kissing-tumbling of two particles are conducted to validate the resolved CFD-DEM model. It turns out that the resolved CFD-DEM model developed in this paper can accurately calculate the fluid-solid interactions and predict the trajectory of solid particles interacting with the liquid phase. Numerical demonstrations, namely two particles moving along a free surface when the liquid phase evaporates, and particle transport and accumulations inside an evaporating sessile droplet show the performance of the resolved model.

DOI: 10.1016/j.partic.2023.12.004

Source: https://www.sciencedirect.com/science/article/abs/pii/S1674200123003218