20.500.12556/RUL-177755 Enhanced surfaces manufactured using pulsed laser texturing for highly efficient two-phase cooling Efficient thermal management is critical for high power-density systems. Pool boiling offers a highly effective mode of heat transfer due to the energy intensive liquid-to-vapor phase transition which can absorb large quantities of heat at a relatively constant temperature. However, due to the potential absence of adequate and correctly sized nucleation sites, as well as poor surface wettability and wickability, the performance of pool boiling on smooth surfaces is sub-optimal. Surface modifications increase nucleation site density as well as tune surface wetting characteristics and liquid supply capability which are key pathways for augmenting boiling heat transfer. In this study, engineered surfaces are fabricated on pure copper substrates using nanosecond laser treatment. Pool boiling heat transfer experiments are conducted at atmospheric pressure using deionized water as the working fluid. Two types of surfaces: cross-hatch patterned, and checkerboard patterned are created for pool boiling investigation. The spacing between two consecutive lines of the cross-hatch pattern was varied to determine the relationship between line spacing and critical heat flux (CHF). For checkerboard surfaces, multiple samples were prepared by changing the size of the square checker regions. Results show that a moderate improvement of CHF (∼ 56 %) and a significant enhancement of boiling heat transfer coefficient (∼ 730 %) can be attained on the laser textured surfaces compared to the smooth copper surface. These results demonstrate that boiling behavior can be manipulated by tuning geometry-driven liquid and vapor transport mechanisms. The findings provide insights into the relationship between surface topology and boiling heat transfer characteristics, offering guidelines for high performance pool boiling surface design. highly efficient cooling pool boiling laser structuring cross-hatch pattern checkerboard pattern geometry optimization laser surface engineering učinkovito hlajenje vrenje lasersko strukturiranje križni vzorec vzorec šahovnice geometrijska optimizacija laserski inženiring površin true false true Angleški jezik Slovenski jezik Članek v reviji 2026-01-06 12:33:59 2026-01-06 12:34:07 2026-01-07 04:28:46 0000-00-00 00:00:00 2026 0 0 15 str. Vol. 288, pt. 1, art. 129497 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.537 1359-4311 10.1016/j.applthermaleng.2025.129497 263566339 Roni,_Gregorcic_..._Enhanced_surfaces_manufactured_...pdf Roni,_Gregorcic_..._Enhanced_surfaces_manufactured_...pdf 1 15FEF1A252283A71B5B7A8240115A593 659fbc86c30168f9fee46e15b9deeb697776c550d04dcbb09010909f88e23b19 2872beed-eaf4-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225047 https://www.sciencedirect.com/science/article/pii/S135943112504089X 1 9cf4a099-eaf3-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225046 Fakulteta za strojništvo 0 0 0