20.500.12556/RUL-186686 Vpliv viskoznosti infuziranega silikonskega olja na širjenje in zmrzovanje vodne kapljice ob trku s podhlajeno spolzko površino Effect of infused silicone oil viscosity on spreading and freezing of a water droplet impacting a subcooled slippery surface Nabiranje ledu in sreža močno zmanjša funkcionalnost številnih površin. V diplomski nalogi je bil obravnavan vpliv viskoznosti infuziranega silikonskega olja na obnašanje vodne kapljice ob trku s podhlajeno spolzko površino. Preizkušene površine so bile izdelane z laserskim strukturiranjem, hidrofobizacijo in infuzijo silikonskih olj različnih viskoznosti. Pri različnih temperaturah površine in Webrovih številih smo analizirali širjenje, krčenje in zmrzovanje vodnih kapljic. Poseben poudarek je bil namenjen maksimalnemu faktorju širjenja kapljice. Rezultati so pokazali, da sta na dinamiko kapljice pomembno vplivajo tako viskoznosti infuziranega olja kot temperatura površine. Z zniževanjem temperature se je spreminjala dinamika širjenja in krčenja kapljice. Različna viskoznost olja je vplivala na interakcijo med kapljico in mazalnim slojem ter posledično na obnašanje kapljice med trkom. Rezultati raziskave tako prispevajo k boljšemu razumevanju vpliva viskoznosti maziva in temperature površine na obnašanje vodne kapljice ob trku s podhlajeno spolzko površino. Ice and frost accumulation significantly reduce the functionality of many surfaces. This thesis investigated the influence of the viscosity of infused silicone oil on the behaviour of a water droplet impacting a supercooled slippery surface. The tested surfaces were fabricated by laser structuring, hydrophobization, and infusion with silicone oils of different viscosities. Droplet spreading, retraction, and freezing were analysed at different surface temperatures and Weber numbers. Particular emphasis was placed on the maximum spreading factor of the droplet. The results showed that both the viscosity of the infused oil and the surface temperature had a significant influence on droplet dynamics. As the temperature decreased, the spreading and retraction dynamics of the droplet changed. Different lubricant viscosities affected the interaction between the droplet and the lubricant layer and consequently influenced the droplet behaviour during impact. The results of this study therefore contribute to a better understanding of the influence of lubricant viscosity and surface temperature on the behaviour of a water droplet impacting a supercooled slippery surface. trk kapljice podhlajena površina spolzka površina zmrzovanje dinamika kapljice viskoznost olja droplet impact subcooled surface slippery surface freezing droplet dynamics oil viscosity true false false [L. Bevk] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-04 08:31:07 2026-09-04 08:31:11 2026-09-05 04:33:56 0000-00-00 00:00:00 2026 0 Ljubljana 0 XIII, 55 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.9.048:544.722.132:532.64(043.2) 289183 290006275 48916.pdf 48916.pdf 1 3DA9CD7E53EE5A4D4F9EACA35E42DA23 817f659ab52efd9f48d8eab8f80e75cc2086b3f194d8b97e10166c70bf935263 3770858f-a82a-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246008 Fakulteta za strojništvo 0 0 0