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arXiv 2307.09313physics.flu-dynphysics.comp-ph
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考虑与不考虑蒸发的气–液–固多相自由表面流动的计算建模

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

Huihuang Xia, Marc Kamlah

AI总结:

本文提出改进的解析CFD-DEM框架和毛细力模型,以模拟有无蒸发条件下的气液固自由表面流动,并通过基准验证和液滴蒸发算例展示其准确性。

摘要:

气–液–固多相系统在喷墨打印、喷雾干燥和涂层等工程应用中无处不在。开发用于模拟这些多相系统的数值框架具有重要意义。本文开发了一种改进的解析CFD-DEM框架,用于模拟考虑与不考虑蒸发的多相自由表面流动。文中提出了一种改进的毛细力模型,以计算自由表面处部分漂浮颗粒的毛细相互作用。通过两个著名的基准算例,即阻力系数计算和单个圆球沉降,对解析CFD-DEM模型进行了验证。结果表明,本文开发的解析CFD-DEM模型能够准确计算流–固相互作用,并预测与液相相互作用的固体颗粒轨迹。数值演示,包括液相蒸发时两个颗粒沿自由表面运动,以及蒸发的固着液滴内部的颗粒输运与聚集,展示了该解析模型的性能。

英文摘要:

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. Two well-known benchmark cases, namely drag coefficient calculation and the single sphere settling, 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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