https://scholars.lib.ntu.edu.tw/handle/123456789/598292
標題: | Spontaneous spreading of nanodroplets on partially wetting surfaces with continuous grooves: Synergy of imbibition and capillary condensation | 作者: | Chu K.-C Tsao H.-K Sheng Y.-J. YU-JANE SHENG |
關鍵字: | Capillary condensation;Imbibition;Many-body dissipative particle dynamics;Spontaneous spreading;Textured surface;Total wetting;Condensation;Contact angle;Hydrophilicity;Textures;Wetting;Hydrophilics;Many body;Many-body dissipative particle dynamic;Nano-droplets;Wetting behavior;Dynamics | 公開日期: | 2021 | 卷: | 339 | 來源出版物: | Journal of Molecular Liquids | 摘要: | The wetting behavior of nanodroplets deposited on hydrophilic textured surfaces with discontinuous and continuous grooves was investigated by many-body dissipative particle dynamics. For surfaces with discontinuous grooves, the apparent contact angle (θa) can be described by the Wenzel model with an effective area ratio. However, for surfaces with continuous grooves, θa of nanodroplets depends on roughness topology, and spontaneous spreading of nanodroplets can take place even for partially wetting surfaces (θY > 0). That is, the partial-to-total wetting transition can occur on hydrophilic surfaces as surface textures change from discontinuous to continuous grooves. The dynamics of the spreading can be characterized by the apparent radius and groove radius (Rg). While the former is time-invariant at early stage, the latter follows the power law Rg ~ t1/4. This spreading of nanodroplets along continuous grooves can be explained from the synergy of spontaneous imbibition into continuous grooves, arrest by sharp edges, and capillary condensation for resuming the flow. ? 2021 |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113183365&doi=10.1016%2fj.molliq.2021.117270&partnerID=40&md5=c1367662a5c2b0ab4a3e1eef38c5241a https://scholars.lib.ntu.edu.tw/handle/123456789/598292 |
ISSN: | 01677322 | DOI: | 10.1016/j.molliq.2021.117270 |
顯示於: | 化學工程學系 |
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