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Numerical simulation of two-dimensional binary droplets collision outcomes using the level set method

机译：水平集法对二维二元液滴碰撞结果的数值模拟

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The present article focuses on the numerical simulation of two-dimensional (2D) binary droplet collision outcomes in an incompressible continuum gas. The Weber numbers applied to predict the various collision outcomes are within the range of those reported in the previous experiments. The droplet collision dynamics are numerically predicted by solving, separately in both phases, the unsteady 2D Navier-Stokes equations using the control volume approach on non-staggered grids. The complex topological changes of droplet interfaces are described by the level set method (LSM), which simultaneously, provides an efficient and robust way to deal automatically with breaking and merging of interfaces without any numerical constraints. The obtained results demonstrated the essential role played by the surface tension in droplet collision dynamics as a stabilising or destabilising force leading to rebound, coalescence or fragmentation collision outcomes. The mechanism of droplet disintegration at relatively high Weber number and the formation of satellite droplets are also discussed.View full textDownload full textKeywordscollision dynamics, droplet rebound, level set method, numerical simulation, surface tension modelling, two-phase flowRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10618562.2011.639767
机译：本文重点讨论不可压缩连续气体中二维（2D）二元液滴碰撞结果的数值模拟。用于预测各种碰撞结果的韦伯数在先前实验报告的范围内。通过在非交错网格上使用控制体积方法分别求解两个阶段中的非定常二维Navier-Stokes方程，可以对液滴碰撞动力学进行数值预测。水平集方法（LSM）描述了液滴接口的复杂拓扑变化，该方法同时提供了一种有效且强大的方法来自动处理接口的断开和合并，而没有任何数值约束。获得的结果表明，表面张力在液滴碰撞动力学中起着稳定作用或去稳定作用，从而导致反弹，聚结或碎片碰撞结果，起着至关重要的作用。还讨论了在较高Weber数下液滴崩解的机理和卫星液滴的形成。查看全文下载全文关键词碰撞动力学，液滴回弹，能级设置方法，数值模拟，表面张力建模，两相流相关var addthis_config = {ui_cobrand ：“ Taylor＆Francis Online”，services_compact：“ citeulike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，more”，pubid：“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/10618562.2011.639767

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