液滴冲击固体表面的光滑粒子动力学模拟
Numerical simulation of liquid drop impacting onto solid surfaces with smoothed particle hydrodynamics
查看参考文献22篇
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文摘
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液滴冲击固体表面的现象广泛地存在于自然界和工业生产中,深入研究液滴冲击固体表面现象对环境工程、微纳米工程以及医药工程等领域有着十分重要的指导作用。该文采用光滑粒子动力学方法(SPH)对液滴冲击固体表面的现象进行了数值模拟。SPH方法是一种纯拉格朗日形式的无网格粒子方法,可以很容易的处理大变形、可变形边界、追踪自由表面以及运动界面。为了提高传统SPH方法的计算精度和数值稳定性,该文在传统SPH方法的基础上对粒子方法中的核梯度进行了修正,采用粒子间相互作用力的形式来模拟表面张力,应用改进的SPH方法对液滴冲击固体表面进行了数值模拟。计算结果表明,改进的SPH方法能够精细地描述液滴冲击固体表面所产生的铺展和飞溅等动力学特性,得到了稳定精确的结果,数值模拟结果与实验观察结果吻合较好。 |
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其他语种文摘
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The phenomena of liquid drop impacting onto solid surfaces exist widely in nature and industrial production. In-depth study of liquid drop impacting is thus of great importance to environmental engineering, micro-nano engineering, bioand chemical engineering. This paper presents a numerical simulation of a single liquid drop impacting onto solid surfaces withsmoothed particle hydrodynamics (SPH). SPH is a Lagrangian, mesh-free particle method, and it is attractive in dealing with free surfaces, moving interfaces and deformable boundaries. In order to improve computational accuracy, the modified schemes omfo kdeirfnieedl gSrPaHdi emnte tfhoro dS PwHa sw uersee du steod. inSvuerfsatcigea tteen sliiqouni def fdercotsp wimerpea mctoindge leodn tuos isnogl itdh es uirnftaecreasc.tIito nis fdoercmeo bnesttwraeteedn pthaartt icthlees,S tPhHe method can effectively simulates the problem of liquid drop impacting onto solid surfaces. It can well describe the dynamics of splashing and spreading with accurate and stable results. The obtained numerical results agree with experimental observations. |
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来源
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水动力学研究与进展. A辑
,2012,27(6):634-639 【核心库】
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DOI
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10.3969/j.issn1000-4874.2012.06.002
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关键词
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液滴冲击
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固体表面
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光滑粒子动力学
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表面张力
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地址
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1.
中北大学机电工程学院, 太原, 030051
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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ISSN
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1000-4874 |
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学科
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力学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:4710000
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