Classification of axisymmetric shapes of droplets on fibers. Could non-wettable fibers support axisymmetric droplets?статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 26 января 2024 г.
Аннотация:With the developments in nanotechnology, nanofibrous materials attract great attention as possible platforms for fluidic engineering. Thisrequires an understanding of droplet interactions with fibers when gravity plays no significant role. This work aims to classify all possibleaxisymmetric configurations of droplets on fibers. The contact angle that the drop makes with the fiber surface is allowed to change from 0to 180. Nodoidal apple-like droplets with inverted menisci cusped toward the droplet center and unduloidal droplets with menisci cuspedaway from the droplet center were introduced and fully analyzed. The existing theory describing axisymmetric droplets on fibers is significantlyenriched introducing new morphological configurations of droplets. It is experimentally shown that the barreled droplets could beformed on non-wettable fibers offering contact angles greater than 90. The theory was quantitatively confirmed with hemispherical droplets formed at the end of a capillary tube and satisfying all the boundary conditions of the model. It is expected that the developed theory could be used for the design of nanofiber-based fluidic devices and for drop-on-demand technologies.