High-speed impact of water droplets on microtextured surfaces: Effect of roughness and wettability on corona splashing; Experimental Thermal and Fluid Science; Vol. 171

High-speed impact of water droplets on microtextured surfaces: Effect of roughness and wettability on corona splashing

Bibliographic Details
Parent link:Experimental Thermal and Fluid Science.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 171.— 2026.— Article number 111618, 15 p.
Other Authors: Verkhodanov D. A. Danila Andreevich, Khomutov N. A. Nikita Andreevich, Piskunov M. V. Maksim Vladimirovich, Vozhakov I. S. Ivan Sergeevich, Starinsky S. V. Sergey Viktorovich, Safonov A. I. Aleksey Ivanovich, Smirnov N. I. Nikita Igorevich
Summary:Title screen
A study of the high-speed impact of water droplets on smooth and microtextured fluoropolymer-coated titanium surfaces is presented. The experimental samples had an average roughness Ra from 0.04 μm to 15.4 μm and a static contact angle θ from 74° to 164°. The 0.5–1.3-mm droplets were impacted on the surfaces at velocities U0 = 5–20 m/s (the Weber number We = 450–2,800). Using a high-speed video camera with a sample rate of 60,000 frames per second, the values of the opening angle α, the maximum diameter Dcor, and the lifetime of the corona were measured and analyzed. In addition, the mean splashing velocities of both large and small secondary fragments were captured. A dimensionless ratio, α/θ, which characterizes the predominance of inertial or adhesive forces, was proposed for the development of an empirical model for predicting Dcor. This model was validated using data from other authors, which proved its applicability in the ranges of We = 450–2,800, Ra = 1.05–38 µm, θ = 69–164° (water) and θ 0° (ethanol). The research elucidated that superhydrophobic microtextured surfaces provide greater symmetry in corona splash and a larger opening angle. However, these surfaces also delayed liquid removal during splashing, which has the potential to impact the effectiveness of their water-repellent properties
Текстовый файл
AM_Agreement
Language:English
Published: 2026
Subjects:
Droplet-wall impact
Superhydrophobic surface
Surface roughness
Corona splash
Laser texturing
Wettability
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1016/j.expthermflusci.2025.111618
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684366

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