Role of the Dynamic Contact Angle on Splashing

Autor:	J. Rafael Castrejón-Pita, Kensuke Yokoi, Miguel A. Quetzeri-Santiago, Alfonso A. Castrejón-Pita
Rok vydání:	2019
Předmět:	Contact angle Materials science 0103 physical sciences General Physics and Astronomy Wetting Mechanics 010306 general physics 01 natural sciences Capillary number Dynamic contact
Zdroj:	Physical Review Letters. 122
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.122.228001
Popis:	In this letter we study the splashing behaviour of droplets upon impact onto a variety of substrates with different wetting properties, ranging from hydrophilic to super-hydrophobic surfaces. In particular, we study the effects of the dynamic contact angle on splashing. The experimental approach uses high-speed imaging and image analysis to recover the apparent contact angle as a function of the spreading speed. Our results show that neither the Capillary number nor the so-called splashing parameter are appropriate to characterise the splashing behaviour under these circumstances. However, we show that the maximum dynamic advancing contact angle and the splashing ratio β adequately characterise the splashing behaviour.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f3cdd3658ac390987009b4091d7cdf8 https://doi.org/10.1103/physrevlett.122.228001 Zobrazit plný text záznamu