Capillary pumping between droplets on superhydrophobic surfaces

Autor:	Shiva Moradi Mehr, Mohammad A. Charsooghi, Luca Businaro, Mehdi Habibi, Ali‐Reza Moradi
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	Physics::Fluid Dynamics capillary pumping Environmental Engineering Physics and Physical Chemistry of Foods droplets General Chemical Engineering superhydrophobic surface Biotechnology
Zdroj:	AIChE Journal, 69(3) AIChE Journal 69 (2023) 3
ISSN:	0001-1541
Popis:	The famous two-balloon experiment involves two identical balloons filled up with air and connected via a hollow tube, and upon onsetting the experiment one of the balloons shrinks and the other expands. Here, we present the liquid version of that experiment. We use superhydrophobic (SHP) substrates to form spherical droplets and connect them with a capillary channel. Different droplet sizes, substrates of different hydrophobicities, and various channel pathways are investigated, and morphometric parameters of the droplets are measured through image processing. In the case of SHP substrates the pumping is from the smaller droplet to the larger one, similar to the two-balloon experiment. However, if one or both of the droplets are positioned on a normal substrate the curvature radius will indicate the direction of pumping. We interpret the results by considering the Laplace pressures and the surface tension applied by the channel at the connecting points.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f897d03dd76e3565efe0d9e236f48a26 https://doi.org/10.1002/aic.17847 Zobrazit plný text záznamu Plný text