20.500.12556/RUL-142598 Predicting the drop size passing through a superhydrophobic orifice Superhydrophobic surfaces can be utilized in various applications, such as enhanced heat transfer, anti-icing, self-cleaning, and viscous drag reduction. In this work, we investigated the water droplet size separation using superhydrophobic surfaces, which is relatively new and unexplored research field, but yet promising for pharmaceutical and medical applications. We developed a theoretical model for predicting the diameter of a droplet passing through a smaller superhydrophobic orifice by considering the balance of forces, geometrical characteristics, and the surface wettability. For verification of the model, experimental water droplet size separation was conducted using a thin superhydrophobic copper foil with a laser-cut orifice with a diameter ranging from 1.2 to 2.1 mm. A comparison of the experimental and analytical results has shown that the error of the model is less than 20% within the model's validity range with the upper limit at the capillary length of the fluid. By moving away from this limit toward smaller droplet diameters, the accuracy of the model improves and reaches an error of less than 7% at the smallest used orifice diameter of 1.2 mm. superhydrophobic surface droplet size separation theoretical model orifice superhidrofobna površina velikostna separacija kapljic teoretični model odprtina true false true Angleški jezik Slovenski jezik Članek v reviji 2022-11-15 08:41:22 2022-11-15 08:41:28 2023-11-29 09:02:28 0000-00-00 00:00:00 2022 0 0 8 str. iss. 11, art. 117117 Vol. 34 Nov. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-11-11 66.02 1089-7666 10.1063/5.0125906 129336579 Jereb_..._-Predicting_the_drop_size_passing_through_a_superhydrophobic_orifice.pdf Jereb_..._-Predicting_the_drop_size_passing_through_a_superhydrophobic_orifice.pdf 1 92E47856C976DC0750274F0CA03E10A1 0623dbbaf339ec04ddb321096b4582e4000281eab76aa503cc1df7adf0cb8713 681438b7-64b9-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164026 https://aip.scitation.org/doi/full/10.1063/5.0125906 1 cf1541a6-64b8-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164025 Fakulteta za strojništvo 0 0 0