Pool boiling enhancement with submerged liquid jet impingement on a laser-engineered microchannel surface

Žalec, Domen (avtor), Hadžić, Armin (avtor), Zupančič, Matevž (avtor), Može, Matic (avtor), Golobič, Iztok (avtor)

Effective thermal management of high-power electronics requires cooling solutions capable of dissipating high heat fluxes while maintaining low surface temperatures. This study investigates the pool boiling performance of two surfaces: a reference surface and a laser-textured microchannel surface, both tested with and without submerged liquid jet impingement. Experiments were conducted using saturated, twice-distilled water at atmospheric pressure, with three different mass fluxes delivered by a jet impingement device. Results show that incorporating microtubes into the microchannels to deliver direct jet impingement reduces surface superheat, particularly at higher heat fluxes. The positioning of the jet impingement device plays a key role in critical heat flux (CHF) performance. Devices embedded within the microchannels at the bottom surface yield a higher CHF enhancement with increasing mass flux compared to those positioned just above the surface. For the reference surface, CHF increases significantly with higher mass flux, while the laser-textured surface shows relatively constant CHF values. At mass fluxes of 0.64 and 3.22 kg·m▫$^{−2}$▫·s▫$^{−1}$▫, both surfaces exhibit similar CHF, but at the highest mass flux, the reference surface outperforms the laser-textured one by 20 %. The highest recorded CHF of 9098 kW·m▫$^{−2}$▫ was achieved on the reference surface. The reduced performance of the laser-textured surface is attributed to the formation of an oxidation layer, which acts as a thermal barrier, lowering heat transfer efficiency and contributing to localized dry-out. This ultimately decreases both the CHF and the heat transfer coefficient.

• Jezik: Angleški jezik
• Ključne besede: pool boiling, critical heat flux, jet impingement, mass flux, surface engineering, heat transfer enhancement
• 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: 2025
• Št. strani: 11 str.
• Številčenje: Vol. 68, art. 104318
• PID: 20.500.12556/RUL-175852
• UDK: 536.2:542.467
• ISSN pri članku: 2451-9049
• DOI: 10.1016/j.tsep.2025.104318
• COBISS.SI-ID: 256659715
• Datum objave v RUL: 11.11.2025

Gradivo je del revije

• Naslov: Thermal science and engineering progress
• Založnik: Elsevier
• ISSN: 2451-9049
• COBISS.SI-ID: 528293913

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: vrenje v bazenu, kritična gostota toplotnega toka, hlajenje s curkom, gostota masnega toka, površinsko inženirstvo, izboljšanje prenosa toplote

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0223
• Naslov: Prenos toplote in snovi

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: J2-50085
• Naslov: Raziskave medfaznih pojavov kapljic in mehurčkov na funkcionaliziranih površinah ob uporabi napredne diagnostike za razvoj okoljskih tehnologij prihodnosti in izboljšanega prenosa toplote (DroBFuSE)