https://scholars.lib.ntu.edu.tw/handle/123456789/576171
Title: | Pinching Dynamics and Satellite Droplet Formation in Symmetrical Droplet Collisions | Authors: | Huang K.-L Pan K.-L Josserand C. KUO-LONG PAN |
Keywords: | Disintegration; Drop formation; Satellites; Droplet collision; Head-on collision; Liquid filaments; Phenomenological models; Pinchoff; Satellite droplets; Scaling theories; Weber numbers; Drop breakup; article; simulation | Issue Date: | 2019 | Journal Volume: | 123 | Journal Issue: | 23 | Source: | Physical Review Letters | Abstract: | 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 |
Appears in Collections: | 機械工程學系 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.