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首页> 外文期刊>International journal of micro-nano scale transport >Simulation of droplet impact on super hydrophobic surface
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Simulation of droplet impact on super hydrophobic surface

机译：液滴对超疏水表面的冲击模拟

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Super hydrophobic surfaces find uses in many applications; therefore proper design of super hydrophobic surfaces is very crucial. A lot of work has already been done for static droplets and super hydrophobic surface interactions. There have also been some significant experiments carried out for dynamic droplet impact on super hydrophobic surfaces. The present work focuses on the super hydrophobic surface under dynamic conditions, with the study predominantly carried out through numerical simulation. Various parameters during impact and time variance after impact (typically up to 10 μs) were considered. The transition from water hammer pressure (order of ρCV ) to flow pressure ( order of ½ ρV~2) is taken as the main parameter of analysis. During water hammer pressure domain, a strong tendency to cause wetting (Wenzel state) is seen. During flow pressure domain, wetting tendency is significantly reduced (Cassie-Baxter state). These states and the transition from one to the other are very crucial to the design of super hydrophobic surfaces. Hence analyses of pressure regimes are important in designing super hydrophobic surfaces for dynamic conditions. Furthermore, the transition from water hammer pressure regime to normal flow regime is studied. A parametric study is done on this transition of regime.
机译：超疏水表面可用于许多应用中。因此，超疏水表面的正确设计非常关键。对于静态液滴和超疏水性表面相互作用，已经做了很多工作。对于动态液滴对超疏水表面的影响，也进行了一些重要的实验。目前的工作集中在动态条件下的超疏水表面，该研究主要通过数值模拟进行。考虑了冲击过程中的各种参数以及冲击后的时间变化（通常高达10μs）。从水锤压力（ρCV阶）到流量压力（1/2ρV〜2阶）的过渡是分析的主要参数。在水锤压力域中，可以看到引起润湿的强烈趋势（Wenzel状态）。在流动压力域中，润湿趋势显着降低（Cassie-Baxter状态）。这些状态以及从一种状态到另一种状态的过渡对于超疏水表面的设计至关重要。因此，在设计动态条件下的超疏水表面时，压力状态的分析很重要。此外，研究了从水锤压力状态到正常流动状态的过渡。对这种政权过渡进行了参数研究。

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    D. Johnson; Sarit K. Das;

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    Department of Mechanical Engineering, Indian Institute of Technology, Madras, Chennai 600036, India;

    Department of Mechanical Engineering, Indian Institute of Technology, Madras, Chennai 600036, India;

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