TY - GEN
T1 - Enhanced pool-boiling heat transfer and critical heat flux using femtosecond laser surface processing
AU - Kruse, Corey M.
AU - Anderson, Troy
AU - Wilson, Chris
AU - Zuhlke, Craig
AU - Alexander, Dennis
AU - Gogos, George
AU - Ndao, Sidy
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/9/4
Y1 - 2014/9/4
N2 - In this paper, we present the experimental investigation of pool boiling heat transfer on multiscale (micro/nano) functionalized metallic surfaces. The multiscale structures were fabricated via a femtosecond laser surface process (FLSP) technique which forms mound-like microstructures covered by layers of nanoparticles. Using a pool boiling experimental setup with deionized water as the working fluid, both the heat transfer coefficient and critical heat flux were investigated. The polished reference sample was found to have a critical heat flux of 91 W/cm2at 40 °C of superheat and a maximum heat transfer coefficient of 23,000 W/m2-K. The processed sample was found to have a critical heat flux of 122 W/cm2at 18 °C superheat and a maximum heat transfer coefficient of 67,400 W/m2-K. Flow visualization revealed nucleate boiling to be the main two-phase heat transfer mechanism. The overall heat transfer performance of the metallic multiscale structured surface has been attributed to both augmented heat transfer surface area and enhanced nucleate boiling regime. On the other hand, increase in the critical heat flux can be attributed to the superhydrophilic nature of the laser processed surface and the presence of nanoparticle layers.
AB - In this paper, we present the experimental investigation of pool boiling heat transfer on multiscale (micro/nano) functionalized metallic surfaces. The multiscale structures were fabricated via a femtosecond laser surface process (FLSP) technique which forms mound-like microstructures covered by layers of nanoparticles. Using a pool boiling experimental setup with deionized water as the working fluid, both the heat transfer coefficient and critical heat flux were investigated. The polished reference sample was found to have a critical heat flux of 91 W/cm2at 40 °C of superheat and a maximum heat transfer coefficient of 23,000 W/m2-K. The processed sample was found to have a critical heat flux of 122 W/cm2at 18 °C superheat and a maximum heat transfer coefficient of 67,400 W/m2-K. Flow visualization revealed nucleate boiling to be the main two-phase heat transfer mechanism. The overall heat transfer performance of the metallic multiscale structured surface has been attributed to both augmented heat transfer surface area and enhanced nucleate boiling regime. On the other hand, increase in the critical heat flux can be attributed to the superhydrophilic nature of the laser processed surface and the presence of nanoparticle layers.
KW - Critical Heat Flux
KW - Femtosecond Laser Surface Processing
KW - Metallic Surface Enhancement
KW - Pool Boiling
KW - heat transfer coefficient
UR - http://www.scopus.com/inward/record.url?scp=84907691074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907691074&partnerID=8YFLogxK
U2 - 10.1109/ITHERM.2014.6892315
DO - 10.1109/ITHERM.2014.6892315
M3 - Conference contribution
AN - SCOPUS:84907691074
T3 - Thermomechanical Phenomena in Electronic Systems -Proceedings of the Intersociety Conference
SP - 444
EP - 451
BT - Thermomechanical Phenomena in Electronic Systems -Proceedings of the Intersociety Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 14th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2014
Y2 - 27 May 2014 through 30 May 2014
ER -