Dynamic characteristics of water spreading over laser-textured aluminum alloy surfaces

Kód výsledku v IS VaVaI

RIV/00216305:26210/20:PU139960 - isvavai.cz

Výsledek na webu

https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=D6dk2Su8QCzUB3OpXAV&page=1&doc=1

DOI - Digital Object Identifier

10.1016/j.colsurfa.2020.125253

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic characteristics of water spreading over laser-textured aluminum alloy surfaces

Popis výsledku v původním jazyce

Laser texturing has great potential for controlling wetting properties as well as spreading dynamics of liquid small volumes on technological metal surfaces. In this work, nanosecond pulse laser was used to create some ordered and anisotropic textures on aluminum alloy surfaces. The dynamic characteristics and contact angle hysteresis were obtained by increasing and decreasing the droplet volume. In this wetting/dewetting cycle, we recorded fluctuational movements of the three-phase contact line over the surfaces with an ordered texture when the capillary number tends to zero. These movements are caused by activity of forces leading to fluid circulation in the droplet, as well as inertia and gravity. To determine the contact angle hysteresis when the three-phase contact line fluctuates, we developed a new approach. We showed that the contact angle hysteresis depends on the droplet state (the presence of air cushions in the cavities in a thin near-surface layer) largely than on the roughness. We found the influence of repeated wetting cycles (multiple advancing and receding liquid movement) on the dynamic characteristics of water spreading over the laser-textured aluminum alloy surfaces. The molecular-kinetic and hydrodynamic models were used to interpret the liquid movement over the surfaces with ordered and anisotropic textures.

Název v anglickém jazyce

Dynamic characteristics of water spreading over laser-textured aluminum alloy surfaces

Popis výsledku anglicky

Laser texturing has great potential for controlling wetting properties as well as spreading dynamics of liquid small volumes on technological metal surfaces. In this work, nanosecond pulse laser was used to create some ordered and anisotropic textures on aluminum alloy surfaces. The dynamic characteristics and contact angle hysteresis were obtained by increasing and decreasing the droplet volume. In this wetting/dewetting cycle, we recorded fluctuational movements of the three-phase contact line over the surfaces with an ordered texture when the capillary number tends to zero. These movements are caused by activity of forces leading to fluid circulation in the droplet, as well as inertia and gravity. To determine the contact angle hysteresis when the three-phase contact line fluctuates, we developed a new approach. We showed that the contact angle hysteresis depends on the droplet state (the presence of air cushions in the cavities in a thin near-surface layer) largely than on the roughness. We found the influence of repeated wetting cycles (multiple advancing and receding liquid movement) on the dynamic characteristics of water spreading over the laser-textured aluminum alloy surfaces. The molecular-kinetic and hydrodynamic models were used to interpret the liquid movement over the surfaces with ordered and anisotropic textures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

1873-4359

Svazek periodika

603

Číslo periodika v rámci svazku

125253

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000569891300004

EID výsledku v databázi Scopus

2-s2.0-85087486770