Enhanced surfaces manufactured using pulsed laser texturing for highly efficient two-phase cooling

Roni, Md Rakibul Hasan (avtor), Shatskiy, Evgeny (avtor), Aflatounian, Shayan (avtor), Dewanjee, Sujan (avtor), Gregorčič, Peter (avtor), Ganesan, Vishwanath (avtor), Yoo, Donghyeon (avtor), Yang, Cheng-Min (avtor), Braun, Paul V. (avtor), Miljkovic, Nenad (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: highly efficient cooling, pool boiling, laser structuring, cross-hatch pattern, checkerboard pattern, geometry optimization, laser surface engineering
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 15 str.
• Številčenje: Vol. 288, pt. 1, art. 129497
• PID: 20.500.12556/RUL-177755
• UDK: 544.537
• ISSN pri članku: 1359-4311
• DOI: 10.1016/j.applthermaleng.2025.129497
• COBISS.SI-ID: 263566339
• Datum objave v RUL: 06.01.2026

Gradivo je del revije

• Naslov: Applied thermal engineering
• Skrajšan naslov: Appl. therm. eng.
• Založnik: Elsevier
• ISSN: 1359-4311
• COBISS.SI-ID: 1861910

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: učinkovito hlajenje, vrenje, lasersko strukturiranje, križni vzorec, vzorec šahovnice, geometrijska optimizacija, laserski inženiring površin

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Air Conditioning and Refrigeration Center

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: International Institute for Carbon Neutral Energy Research