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    赵松川博士学术讲座: Raindrop Impact Sand
    点击量: 录入时间:2017-03-31

    应航天航空学院Marie-Jean Thoraval教授邀请,赵松川博士将来访我校并作学术报告。

    报告人:赵松川博士 (荷兰莱顿大学)

    时间:201746日下午2:00-3:00

    地点:航天航空学院教一楼第三会议室

    报告题目:Raindrop Impact Sand

    报告摘要:

    Liquid droplets impacting on a granular layer are very common in nature, industry, and agriculture, ranging from raindrops falling onto the desert sand or soil to granulation in the production process of many pharmaceuticals. As a droplet impacts upon a granular substrate, both the intruder and the target undergo deformation, during which the liquid may penetrate into the substrate. These three aspects together distinguish it from other impact phenomena in the literature, and add new dimensions to the parameter space of droplet impact phenomena, e.g., the properties of individual grains and the whole packing. The recent exploration of the large parameter space reveals various crater morphologies and a transition of maximum droplet spreading from a capillary regime to a viscous regime. To gain insight in the underlying mechanism we measure the deformation of the substrate during the impact and the maximum spreading diameter of the droplet by high-speed imaging and laser profilometry. Subsequently, we establish a dynamical model to explain the observed transition of droplet spreading and crater morphologies.

    报告人简介:

    赵松川博士,2006年在河北工业大学获得学士学位,2009年在中国人民大学获得硕士学位,2013年在德国马普动力学与自组织研究所获得博士学位。2013-2016年在荷兰屯特大学流体物理组做博士后,2016年至今在荷兰莱顿大学做博士后。研究方向为液滴撞击动力学,在PRLSoft MatterPRE等期刊上发表论文多篇。研究工作被Science重点介绍。

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