标题： 超疏水和润滑剂浸渍表面的水入射动力学：理论与实验视角 显示英文标题

标题： Water Entry Dynamics of Superhydrophobic and Lubricant-Impregnated Surfaces: A Theoretical and Experimental Perspective

摘要： 在当前的研究中，对超疏水和润滑剂浸渍的铝球在液体表面上的撞击动力学进行了全面的研究。 该研究深入探讨了撞击过程中的水动力润滑行为及由此产生的现象。 Worthington射流和空腔提供了对基本力的更深入了解。 实验分析和理论模型表明其在流体动力学、摩擦学和材料科学等多个领域的潜在应用。 对铝纹理球体的稳定性进行了研究，并对射流高度和断裂现象进行了详细分析。 对超疏水表面上的夹带空气以及LIS中的油在获得更高射流方面的实验进行了。 实验装置涉及一个精心设计的装置，通过高速成像技术进行撞击分析。 参数如撞击速度、韦伯数和球体直径被系统地改变，以了解它们对观察到的动力学的影响。 润滑剂的粘度选择使得其与水的粘度相当。 此外，对润滑剂浸渍表面（LIS）的研究评估了与控制表面和纹理表面相比的摩擦损失，即阻力减少。 总之，对撞击动力学的有价值的见解推进了我们对水动力润滑及其应用的理解。 本文提出的发现强调了进一步研究优化表面特性、选择合适的润滑剂以及探索流体动力学、表面工程和机械工程领域更广泛应用的重要性。 显示英文摘要

摘要： In this current work, a comprehensive investigation into the impact dynamics of superhydrophobic and lubricant-impregnated aluminium sphere balls on liquid surfaces were carried out. The study delves into the hydrodynamic lubrication behavior and the resulting phenomena during impact. The Worthington jet and cavity associated give more insight into fundamental forces. The experimental analysis and theoretical modeling suggest potential applications in various fields such as fluid dynamics, tribology, and materials science. The stability investigation on an aluminum-textured sphere ball is carried out, and the evaluation of jet height and pinch-off phenomena is analyzed in detail. The experiment on entrapped air on a superhydrophobic surface and the oil inside the LIS for greater height was performed. The experimental setup involved a carefully designed apparatus for impact analysis by utilizing high-speed imaging techniques. Parameters such as impact velocity, Weber number, and sphere diameter were systematically varied to understand their influence on the observed dynamics. The lubricant viscosity is chosen such that it is comparable to water viscosity. Furthermore, the study on Lubricant Impregnated Surfaces (LIS) assessed frictional losses, i.e., drag reduction, compared to control and textured surfaces. In conclusion, the valuable insights into the impact dynamics advance our understanding of hydrodynamic lubrication and its applications. The findings presented here underscore the importance of further research in optimizing surface properties, selecting suitable lubricants, and exploring broader applications in the fields of fluid dynamics, surface engineering, and mechanical engineering.