Role of the Dynamic Contact Angle on Splashing

In this Letter, we study the splashing behavior of droplets upon impact onto a variety of substrates with different wetting properties, ranging from hydrophilic to superhydrophobic surfaces. In particular, we study the effects of the dynamic contact angle on splashing. The experimental approach uses...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2019-06, Vol.122 (22), p.228001-228001, Article 228001
Main Authors: Quetzeri-Santiago, Miguel A, Yokoi, Kensuke, Castrejón-Pita, Alfonso A, Castrejón-Pita, J Rafael
Format: Article
Language:English
Subjects:
Contact angle
Hydrophobicity
Image analysis
Splashing
Substrates
Wetting
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this Letter, we study the splashing behavior of droplets upon impact onto a variety of substrates with different wetting properties, ranging from hydrophilic to superhydrophobic 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 characterize the splashing behavior under these circumstances. However, we show that the maximum dynamic advancing contact angle and the splashing ratio β adequately characterize the splashing behavior.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.122.228001