20.500.12556/RUL-101201 Scalable surface microstructuring by a fiber laser for controlled nucleate boiling performance of high- and low-surface-tension fluids Nucleate boiling enables effective cooling and heat transfer at low temperature differences between a heated surface and the surrounding fluid. It is utilized in many applications, ranging from large power plants to small microelectronics. To enhance the boiling process by minimization of the surface temperature and increase the maximum attainable heat flux, several approaches for surface modifications were recently developed. However, each of them has at least one important drawback, including challenging and expensive production, mechanical and/or thermal instability or problematic scale-up. Herein, a straightforward, robust and flexible method using a nanosecond fiber laser for production of surfaces with multi-scale micro-cavities (with diameters ranging from 0.2 to 10 µm) is developed. Examination of these surfaces in two very contrasting fluids - water, which is polar, has high surface tension and high latent heat of vaporization; and non-polar, dielectric tetradecafluorohexane (FC-72) with low surface tension and much lower latent heat - confirms that such surfaces enable enhanced heat transfer and controlled boiling in combination with diverse fluids. This demonstration suggests that the developed method has the potential to overcome the current limitations for further miniaturization of microelectronic devices and to increase performance and safety in high heat flux systems. nucleate boiling laser microstructuring surface ingenering mehurčkasto vrenje lasersko mikrostrukturiranje inženiring površin true false true Angleški jezik Slovenski jezik Članek v reviji 2018-05-11 08:55:09 2018-05-11 08:55:12 2022-08-14 03:43:33 0000-00-00 00:00:00 2018 0 0 8 str. art. 7461 Vol. 8 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535(045) 2045-2322 10.1038/s41598-018-25843-5 16034331 RAZ_Gregorcic_Peter_i2018.pdf RAZ_Gregorcic_Peter_i2018.pdf 1 F11806FBCBE4DA9EFCD9F74A7944C29D 9bc21ef49cafad7bc202f863e4ebcf3c91961e1b93c6398971ef938bfba4cfee 32633a88-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=111135 https://www.nature.com/articles/s41598-018-25843-5 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=141344 Fakulteta za strojništvo 0 0 0