Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls

The control of the droplet shape during the impact on a solid surface is of relevance for several practical applications, such as inkjet printing technologies. Although several studies have reported factors affecting the final droplet shape, understanding of the liquid spreading process is still lac...

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Autores principales:	Wenwu Ding, Carlos A. Dorao, Maria Fernandino
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/028cae8f4b394a829f76175238b26808
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spelling	oai:doaj.org-article:028cae8f4b394a829f76175238b268082021-12-01T18:52:06ZAnisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls2158-322610.1063/5.0072610https://doaj.org/article/028cae8f4b394a829f76175238b268082021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0072610https://doaj.org/toc/2158-3226The control of the droplet shape during the impact on a solid surface is of relevance for several practical applications, such as inkjet printing technologies. Although several studies have reported factors affecting the final droplet shape, understanding of the liquid spreading process is still lacking. In this work, droplets of different velocities are deposited on surfaces patterned with conical and cylindrical pillars. It is shown that for the structures of the same height and pitch, the shape of the lateral wall of the micro-structures affects the droplet shape. In addition, at higher deposition velocity, the initial polygonal/square shape of the droplets evolves into a more circular shape. The change in the shape due to the lateral wall of the structures is the result of the solid–liquid contact both above and below the structures and the way in which the liquid is able to move in between the structures for different passage areas.Wenwu DingCarlos A. DoraoMaria FernandinoAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115319-115319-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Wenwu Ding Carlos A. Dorao Maria Fernandino Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
description	The control of the droplet shape during the impact on a solid surface is of relevance for several practical applications, such as inkjet printing technologies. Although several studies have reported factors affecting the final droplet shape, understanding of the liquid spreading process is still lacking. In this work, droplets of different velocities are deposited on surfaces patterned with conical and cylindrical pillars. It is shown that for the structures of the same height and pitch, the shape of the lateral wall of the micro-structures affects the droplet shape. In addition, at higher deposition velocity, the initial polygonal/square shape of the droplets evolves into a more circular shape. The change in the shape due to the lateral wall of the structures is the result of the solid–liquid contact both above and below the structures and the way in which the liquid is able to move in between the structures for different passage areas.
format	article
author	Wenwu Ding Carlos A. Dorao Maria Fernandino
author_facet	Wenwu Ding Carlos A. Dorao Maria Fernandino
author_sort	Wenwu Ding
title	Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
title_short	Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
title_full	Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
title_fullStr	Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
title_full_unstemmed	Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
title_sort	anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/028cae8f4b394a829f76175238b26808
work_keys_str_mv	AT wenwuding anisotropicwettingandfinalshapeofdropletsimpactingonmicropillarswithnonverticallateralwalls AT carlosadorao anisotropicwettingandfinalshapeofdropletsimpactingonmicropillarswithnonverticallateralwalls AT mariafernandino anisotropicwettingandfinalshapeofdropletsimpactingonmicropillarswithnonverticallateralwalls
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Anisotropic wetting and final shape of droplets impacting on micropillars with non-vertical lateral walls

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