Article
Chemistry, Multidisciplinary
Hyunggon Park, S. Farzad Ahmadi, Thomas Foulkes, Jonathan Boreyko
Summary: Surface with micro/nano-structures can enhance the critical heat flux of nucleate boiling by increasing liquid phase wickability, and removing surface bubbles at smaller sizes is an alternative strategy. In this study, a rationally designed micro-structured surface is fabricated to enable coalescence-induced departure of microscopic vapor bubbles during pool boiling of water at significantly smaller sizes than single-bubble buoyant departure.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Thermodynamics
Zhen Yang, Yuanpeng Yao, Huiying Wu
Summary: This study investigates the specific effects of surfactants on the subcooled boiling heat transfer characteristics of pure water. The results show that Tween20 can enhance boiling performance by increasing the number of nucleation sites, but high concentrations weaken the enhancement. Span20 only shows enhancement at low concentrations, while high concentrations lead to increased wall superheat. The mixture of Tween20 and Span20 exacerbates the boiling deterioration effect of Span20. These findings provide a better understanding of surfactants and their practical applications in boiling heat transfer enhancement.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Thermodynamics
Munonyedi Egbo, Mohammad Borumand, Yahya Nasersharifi, Gisuk Hwang
Summary: This paper reviews the effects of surface orientation on pool boiling, including experimental and theoretical approaches to understand the changes in heat transfer coefficient and critical heat flux. The results show that tailored two-phase flow can enhance the performance of pool boiling. This review also discusses future research directions for engineered surfaces under different surface orientations.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Alessio D. Lavino, Edward Smith, Mirco Magnini, Omar K. Matar
Summary: This study investigates nucleate pool boiling and the impact of nano-structured surface topography on nucleation and boiling transition through non-equilibrium molecular dynamics simulations. The results demonstrate the critical role of nanoscale heterogeneity in determining pool boiling heat transfer performance, offering a promising approach for optimizing nanostructured surfaces for energy and thermal management applications.
Article
Thermodynamics
Armin Shahmardi, Outi Tammisola, Mauro Chinappi, Luca Brandt
Summary: This study investigates the effects of surface topology, chemistry, and wall temperature on boiling, bubble nucleation and growth, as well as the formation of an insulating vapor film using large-scale MD simulations. The presence of nanostructures determines nucleation sites and facilitates energy transfer from hot substrates to water, while surface chemistry influences bubble shape, with hydrophilic surfaces accelerating nucleation but decelerating expansion. Regardless of wall properties, there is an optimum wall temperature for maximizing energy transfer to the water.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Yi An, Congliang Huang, Xiaodong Wang
Summary: Thermal conductivity plays a more important role than wettability in boiling heat transfer, as high thermal conductivity reduces bubble nucleation activation time. When thermal conductivity is fixed, high wettability enhances boiling heat transfer due to increased bubble-separation frequency. In this experiment, a 2-layered structure combining copper and nickel demonstrated a maximum heat transfer coefficient of about 2.7 x 10(4) W/(m(2).k), which is approximately 1.3 (1.47) times higher than that of single-layer copper (nickel) with the same thickness and porosity, attributed to its high thermal conductivity and wettability.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Ho Seon Ahn, Koung Moon Kim, Somchai Wongwises, Dong-Wook Jerng
Summary: This study designs a unique test section to assess the effect of a small flow path and the wall on the critical heat flux (CHF). Contrary to common knowledge, the study finds that the CHF performance is enhanced in a narrowed hydrodynamic flow path between the heater and cylindrical wall.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Heng Tang, Liangfeng Xia, Yong Tang, Changxing Weng, Zuohuan Hu, Xiaoyu Wu, Yalong Sun
Summary: This study develops microgroove array surfaces with secondary micro-structures to further maximize boiling performance. The enhancement ratio of the micro-structures on boiling performance increases with the increase of number and width of secondary microgrooves. The improved boiling performance is attributed to the increased nucleation sites and heat transfer area provided by the microgroove arrays and secondary micro-structures.
Article
Thermodynamics
Hui-Chung Cheng, Ho-Ching Lin, Ping-Hei Chen
Summary: The study investigated the effects of charged surfactants in electrolytic pool boiling on heat transfer performance, finding an optimal current for enhancing the heat transfer coefficient. Analysis of bubble behaviors using high-speed images revealed that using charged surfactants in electrolytic boiling significantly increased the heat transfer coefficient due to the number of bubble nucleation sites and bubble departure frequency.
APPLIED THERMAL ENGINEERING
(2021)
Review
Thermodynamics
Hantao Jiang, Yingwen Liu, Huaqiang Chu
Summary: This paper provides a comprehensive review of computational methods used in the study of pool boiling. Different methods at macroscopic, mesoscopic, and nanoscale are evaluated for their effectiveness in modeling bubble dynamics. The challenges and future directions for pool boiling simulations are also discussed.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Juan C. Godinez, Hanlyun Cho, Dani Fadda, Jungho Lee, Seong Jin Park, Seung M. You
Summary: The study investigated the pool boiling performance of different surface materials in a water vapor generator, finding significant differences in critical heat flux among treated aluminum, stainless steel, and copper surfaces. Introducing powder injection molding and high-temperature conductive microporous coating can improve the performance of the copper surface, but the high-temperature conductive microporous coating had unexpected effects on increasing critical heat flux.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Review
Thermodynamics
M. M. Mahmoud, T. G. Karayiannis
Summary: Pool boiling is an effective heat transfer mode that can transfer large amounts of heat with small temperature difference. Research on pool boiling fundamentals is crucial for understanding bubble dynamics and improving surface designs. Research focuses on factors affecting boiling processes, such as gas/vapour entrapment and nucleation site stability, to enhance heat transfer.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Thermodynamics
Mukul Ray
Summary: This study investigates the application of silicon oxide coated nanostructured surfaces for nucleate pool boiling heat transfer. The surfaces were prepared with different azimuthal orientations and characterized. The results show that the surface with an intermediate layer of silicon oxide provides higher heat transfer performance, and the surface prepared with 85° GLAD technique exhibits significantly enhanced boiling heat transfer.
HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Ahmed Elkholy, John Swift, Roger Kempers
Summary: The boiling performance of hooks-shaped metal fins manufactured from copper by a skiving process was compared to that of a bare copper surface. The results showed that the hooked surface had a lower wall superheat and a higher heat transfer coefficient. The hooked surface also achieved a significantly enhanced critical heat flux. These findings suggest that the use of hooked surfaces can improve immersion cooling spreaders in power electronics applications.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mu -An Tsai, Liang-Han Chien, Chien-Yeh Hsu
Summary: This research investigates the heat transfer mechanism of helical tubes during saturated pool boiling using experimental measures. R-134a and R-513A were used as working fluids with different saturation temperatures and heat fluxes. The experimental results show that the helical tubes exhibit a tube bundle effect and have higher boiling heat transfer coefficients compared to single straight tubes. The boiling heat transfer coefficients are greatly influenced by the tube pitch and larger, faster-moving bubbles are observed near the upper part of the helical tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Corey M. Kruse, Troy Anderson, Chris Wilson, Craig Zuhlke, Dennis Alexander, George Gogos, Sidy Ndao
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2015)
Article
Nanoscience & Nanotechnology
Corey Kruse, Isra Somanas, Troy Anderson, Chris Wilson, Craig Zuhlke, Dennis Alexander, George Gogos, Sidy Ndao
MICROFLUIDICS AND NANOFLUIDICS
(2015)
Article
Physics, Applied
Edwin Peng, Alfred Tsubaki, Craig A. Zuhlke, Meiyu Wang, Ryan Bell, Michael J. Lucis, Troy P. Anderson, Dennis R. Alexander, George Gogos, Jeffrey E. Shield
APPLIED PHYSICS LETTERS
(2016)
Article
Thermodynamics
Anton Hassebrook, Corey Kruse, Chris Wilson, Troy Anderson, Craig Zuhlke, Dennis Alexander, George Gogos, Sidy Ndao
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2016)
Article
Physics, Applied
Edwin Peng, Ryan Bell, Craig A. Zuhlke, Meiyu Wang, Dennis R. Alexander, George Gogos, Jeffrey E. Shield
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Nanoscience & Nanotechnology
Craig A. Zuhlke, George D. Tsibidis, Troy Anderson, Emmanuel Stratakis, George Gogos, Dennis R. Alexander
Article
Thermodynamics
Corey Kruse, Mike Lucis, Jeff E. Shield, Troy Anderson, Craig Zuhlke, Dennis Alexander, George Gogos, Sidy Ndao
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2018)
Article
Mechanics
Henry Ems, Alfred Tsubaki, Ben Sukup, Siamak Nejati, Dennis Alexander, Craig Zuhlke, George Gogos
Summary: In this study, friction drag reduction was achieved in minichannel laminar flow by utilizing superhydrophobic metallic surfaces with microscale and nanoscale structures created using femtosecond laser surface processing (FLSP). The resulting superhydrophobic surfaces exhibited a drag reduction over the entire range of Reynolds numbers tested, attributed to the slip velocity created by the presence of an air layer between the water and the surface. The drag reduction for superhydrophobic surfaces with tall microstructures was approximately 15%, while surfaces with short microstructures showed a drag reduction ranging from about 31% to 25% with increasing Reynolds number.
Article
Materials Science, Multidisciplinary
Andrew Reicks, Alfred Tsubaki, Mark Anderson, Jace Wieseler, Larousse Khosravi Khorashad, Jeffrey E. Shield, George Gogos, Dennis Alexander, Christos Argyropoulos, Craig Zuhlke
Summary: The use of scalable laser surface processing techniques can achieve near perfect, broadband, omnidirectional emissivity on aluminum surfaces, making them ideal for applications such as passive radiative cooling and spacecraft thermal management.
COMMUNICATIONS MATERIALS
(2021)
Proceedings Paper
Engineering, Mechanical
Corey Kruse, Edwin Peng, Craig Zuhlke, Jeff Shield, Dennis Alexander, Sidy Ndao, George Gogos
PROCEEDINGS OF THE ASME 15TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS, AND MINICHANNELS, 2017
(2017)
Article
Chemistry, Physical
Alfred T. Tsubaki, Mark A. Koten, Michael J. Lucis, Craig Zuhlke, Natale Ianno, Jeffrey E. Shield, Dennis R. Alexander
APPLIED SURFACE SCIENCE
(2017)
Article
Chemistry, Physical
Edwin Peng, Alfred Tsubaki, Craig A. Zuhlke, Meiyu Wang, Ryan Bell, Michael J. Lucis, Troy P. Anderson, Dennis R. Alexander, George Gogos, Jeffrey E. Shield
APPLIED SURFACE SCIENCE
(2017)
Proceedings Paper
Engineering, Manufacturing
Anton Hassebrook, Michael J. Lucis, Jeffrey E. Shield, Craig Zuhlke, Troy Anderson, Dennis Alexander, George Gogos, Sidy Ndao
PROCEEDINGS OF THE ASME 13TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS, AND MINICHANNELS, 2015
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
Craig A. Zuhlke, Troy P. Anderson, Pengbo Li, Michael J. Lucis, Nick Roth, Jeffery E. Shield, Benjamin Terry, Dennis R. Alexander
LASER-BASED MICRO- AND NANOPROCESSING IX
(2015)