https://scholars.lib.ntu.edu.tw/handle/123456789/576171
標題: | Pinching Dynamics and Satellite Droplet Formation in Symmetrical Droplet Collisions | 作者: | Huang K.-L Pan K.-L Josserand C. KUO-LONG PAN |
關鍵字: | Disintegration; Drop formation; Satellites; Droplet collision; Head-on collision; Liquid filaments; Phenomenological models; Pinchoff; Satellite droplets; Scaling theories; Weber numbers; Drop breakup; article; simulation | 公開日期: | 2019 | 卷: | 123 | 期: | 23 | 來源出版物: | Physical Review Letters | 摘要: | In head-on collisions between two droplets, reflexive separation is frequently formed, showing tentative coalescence followed by disintegration into two primary drops. With higher impact inertia relative to surface tension, characterized by a Weber number (We), more satellite droplets are created between the primary drops. In the symmetric configuration, the existing phenomenological models indicate the absence of satellite droplets at the onset We when the coalesced drops start to break. Supported by experimental and simulation evidence, here we demonstrate the exclusive formation of at least one droplet after pinch of the thread connecting the colliding drops. In accordance with the universal features of a thinning liquid filament approaching singularity as predicted by scaling theories of pinch-off, the mechanism of satellite droplet formation in the symmetrical impact of droplets is clarified. Via slight breaking of the symmetry, no satellite droplet can be observed, thus providing a possible interpretation for the discrepancy in the literature and implications for controlling undesirable drop formation. ? 2019 American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076641106&doi=10.1103%2fPhysRevLett.123.234502&partnerID=40&md5=7390455177705502a6c431ec4938e633 https://scholars.lib.ntu.edu.tw/handle/123456789/576171 |
ISSN: | 319007 | DOI: | 10.1103/PhysRevLett.123.234502 |
顯示於: | 機械工程學系 |
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