Article
Mechanics
Chunlei Cao, Xiaojing Ma, Jinliang Xu, Haiwang Li, Guanglin Liu
Summary: A novel mechanism for controlling droplet dynamics using explosive boiling is presented, which provides higher thrust force and adjustable motion direction for droplets.
Article
Engineering, Mechanical
Dong Il Shim, Wei-Ting Hsu, Maroosol Yun, Dongwhi Lee, Beom Seok Kim, Hyung Hee Cho
Summary: Surface manipulations have been used to enhance boiling performance by improving the heat transfer coefficient and critical heat flux. In this study, artificially patterned super-biphilic (SBPI) surfaces were utilized to overcome the limitation of liquid supply in hydrophobic regions and enhance boiling performance. The results highlight the importance of considering both wettability and bubble behaviors in designing structured surfaces for boiling.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Thermodynamics
Rishi L. Ramakrishnan, Prasanna Jayaramu, Sateesh Gedupudi, Sarit K. Das
Summary: This study experimentally investigated the effect of copper surface ageing on heat transfer and critical heat flux during flow boiling. The results showed that ageing significantly reduces the heat transfer coefficient on the copper surface, while having an insignificant impact on the critical heat flux. Surface morphology and wettability of copper were found to change after ageing.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
S. Kalita, Pulak Sen, Dipak Sen, Sudev Das, Ajoy Kumar Das, Bidyut Baran Saha
Summary: This paper investigates pool boiling heat transfer experiments conducted on a microstructured copper surface prepared through chemical etching. Results show significant enhancement in boiling heat transfer coefficient (BHTC) compared to bare copper surface, although the critical heat flux (CHF) is lower. After four repeated tests, the surface's heat transfer coefficient shows a deviation of 4.8%.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Nanoscience & Nanotechnology
Youngsup Song, Chi Wang, Daniel J. Preston, Guanyu Su, Md Mahamudur Rahman, Hyeongyun Cha, Jee Hyun Seong, Bren Philips, Matteo Bucci, Evelyn N. Wang
Summary: This study investigates sandblasting as a scalable surface engineering technique for enhancing pool boiling heat transfer. The results show that surface roughness and volumetric wicking rate increase with the abrasive size, resulting in significant improvements in the critical heat flux and heat transfer coefficient.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Yuanyuan Li, Yuting Li, Wei Jiao, Xueqing Chen, Gui Lu
Summary: Wettability plays a crucial role in boiling heat transfer, with hydrophilic surfaces promoting bubble detachment and hydrophobic surfaces promoting bubble nucleation. Mixed wettability surfaces offer greater adaptability to a wider range of heat flux inputs.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Evgeny A. Chinnov, Sergey Ya Khmel, Victor Yu Vladimirov, Aleksey Safonov, Vitaliy V. Semionov, Kirill A. Emelyanenko, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: Flat surfaces with different patterns of hydrophobic spots were used to study boiling heat transfer. The results showed that heat transfer on biphilic surfaces was significantly higher than on non-biphilic surfaces. Surface texture, shape of hydrophobic regions, and creation method did not have a significant effect on heat transfer. The heat transfer rate depended on the size, distance, and number of hydrophobic spots, with the surface having the largest number of spots showing the highest efficiency. Biphilic surfaces with laser-ablated cavities were the most stable during prolonged contact with boiling water.
Article
Thermodynamics
Atul Ranjan, Israr Ahmad, Rinku Kumar Gouda, Manabendra Pathak, Mohd Kaleem Khan
Summary: This study reports the creation of Cu(OH)2 nanoneedles on a copper surface using an anodization process, which can enhance critical heat flux (CHF) limit in pool boiling applications by improving surface wettability and wickability. Results show that the anodized surface requires higher wall superheat for nucleation and exhibits a higher CHF value compared to the plain surface.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Physical
Jia-Wen Song, Li-Wu Fan
Summary: Contact angle is a quantitative measure of surface wettability and plays a significant role in understanding phenomena like boiling heat transfer. The temperature dependence of water's contact angle is essential for estimating key surface thermodynamic properties. The variation of water contact angle with temperature can be classified into different regimes and has implications for various applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Thermodynamics
Konstantinos Vontas, Manolia Andredaki, Anastasios Georgoulas, Nicolas Miche, Marco Marengo
Summary: This paper conducts an advanced numerical investigation on the effect of surface wettability characteristics on bubble growth within microchannels. The results demonstrate a significant impact of surface wettability on heat transfer coefficients, with hydrophilic and hydrophobic surfaces outperforming single-phase reference simulations by approximately 43.9% and 17.8% respectively.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Chanwoo Park, Taegun Kim, Yong-Il Kim, Ali Aldalbahi, Mohammad Rafe Hatshan, Segonpil An, Sam S. Yoon
Summary: Hierarchically structured ZnO nanowires were fabricated via electrospraying and chemical bath deposition for pool boiling applications, showing an enhancement in critical heat flux and effective heat transfer coefficient while promoting efficient boiling process. The study revealed that ZnO nanowires exhibited good surface wettability and the combination of bare and coated surfaces achieved optimal pool boiling conditions.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
S. Y. Guan, Z. H. Zhang, R. Wu, X. K. Gu, C. Y. Zhao
Summary: The impacts of nano-porous structures on boiling heat transfer characteristics are revealed through theoretical and modeling analysis. The results show that the boiling inception time is proportional to the void volume to solid surface area ratio, and the critical heat flux is a power law function of pore size. Molecular dynamics simulations further validate the theoretical analysis, showing a power law relation between boiling inception time and void volume to solid surface area ratio, and an exponent of 1.232 in the power law relation between critical heat flux and pore size.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Mahdi Roodbari, Hasan Alimoradi, Mehrzad Shams, Cyrus Aghanajafi
Summary: This study developed an experimental setup to investigate the pool boiling heat transfer characteristics of dilute dispersions of TiO2 nanoparticles in water-ethylene glycol 50. The results showed that increasing heater surface roughness can enhance BHTC and nucleation site density, while the effect of nanofluid concentration on heat transfer coefficient depends significantly on the surface roughness. Additionally, using TiO2-WEG50 nanofluid was found to increase the surface wettability of the heater.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Aysenur Ates, Behnam Parizad Benam, Mandana Mohammadilooey, Sueleyman Celik, Vladimir Serdyukov, Anton Surtaev, Abdolali Khalili Sadaghiani, Ali Kosar
Summary: This study investigates the boiling heat transfer performance of surfaces with uniform (superhydrophobic and superhydrophilic) and mixed (superbiphilic) wettability through pool boiling experiments. The experimental results show that the superbiphilic surface can improve boiling heat transfer by 98% and 54% at atmospheric and sub-atmospheric pressures, respectively.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Suchen Wu, Hanhui Dai, He Wang, Chaoqun Shen, Xiangdong Liu
Summary: By investigating the influence of condensation surface wettability on the coupled boiling and condensation heat transfer in a confined chamber, an optimal contact angle of 85 degrees was identified. Two modified condensation surfaces were proposed for enhanced heat transfer efficiency, with the biphilic surface exhibiting relatively better heat transfer performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
C. G. Jothi Prakash, C. Clement Raj, R. Prasanth
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2017)
Review
Green & Sustainable Science & Technology
C. G. Jothi Prakash, R. Prasanth
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2018)
Article
Nanoscience & Nanotechnology
Archana Retnakumari, Sonali Setua, Deepthy Menon, Prasanth Ravindran, Habeeb Muhammed, Thalappil Pradeep, Shantikumar Nair, Manzoor Koyakutty
Review
Materials Science, Multidisciplinary
C. G. Jothi Prakash, R. Prasanth
Summary: This article explores the wide application prospects of surface wettability in energy harvesting, conversion, and emission control technology, focusing on the recent interest in altering surface wettability through nanomaterial fabrication and coating. Surface properties such as roughness, surface energy, porosity, capillarity, and structure play a major role in changing the wettability of liquids over surfaces, with surface chemistry being a key factor in inducing wettability alteration. Surface pre- and post-treatments like laser, ozone plasma, and UV irradiation contribute to changes in surface energy, leading to superhydrophilicity and superhydrophobicity.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
C. G. Jothi Prakash, R. Prasanth
SURFACES AND INTERFACES
(2020)
Article
Engineering, Electrical & Electronic
C. Clement Raj, C. G. Jothi Prakash, R. Prasanth
Summary: The study investigated the effect of imbibition-induced electrolyte wettability on charge carrier density and electric double layer in TiO2 nanotube arrays. Different electrolytes were used to study the surface energy, wettability, and electrochemical properties. The results showed that improving the molar conductivity and ionic mobility of electrolyte can significantly enhance the storage performance of nanotube electrodes. Additionally, the cationic radius of electrolyte was found to influence the stability of electrodes, with HCl electrolyte showing a high areal capacitance in supercapacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
V. Srimurugan, C. G. Jothiprakash, V. Souparnika, R. Prasanth
Summary: In this study, a heterostructure CdS/TiO2 nanotubes photoelectrode decorated with Ni nanoparticles is used to enhance hydrogen generation via the photoelectrochemical method. The optimized photoelectrode showed improved photocurrent density and stability, and achieved enhanced photoelectrochemical hydrogen generation through synergistic effect with the semiconductor ternary junction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
C. G. Jothi Prakash, Jeong-Won Lee
Summary: In this study, a desilanization technique is explored and demonstrated to pattern hydrophilic spots on a superhydrophobic background. The results show that this technique is suitable for microfluidics, water harvesting, and inkjet printing, and can be used to create wetting patterns on curved surfaces.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Aparna Markose, Debanita Das, Prasanth Ravindran
Summary: Efficient energy harvesting devices are essential for sustainable development goals. Titania, a semiconductor, has gained significant research attention for energy independence due to its abundance, stability, non-toxicity, and energy-prospective nature. Improving the poor conductivity of TiO2 is crucial for achieving competitive Power Conversion Efficiency (PCE), and doping with impurities is a prominent method to enhance its conductivity. This review critically analyzes the doping of TiO2 in relation to the PCE of electrochemical cells, offering an alternative quantitative framework for understanding the relationship between doping and photoelectrochemical energy conversion in TiO2-based devices. It also provides insights into data analysis, visualization, and contemporary techniques for doping TiO2.
MATERIALS ADVANCES
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Md Wazedur Rahman, Karthikeyan Velmurugan, Md Sultan Mahmud, Abdullah Al Mamun, Prasanth Ravindran
Summary: The consumption rate of fossil fuels is increasing, prompting the development of different renewable energy models, with hybrid energy sources being more efficient, reliable, and cost-effective. The self-sustainable PV-wind hybrid system provides a viable solution for areas without typical electrification.
2021 IEEE INTERNATIONAL CONFERENCE ON COMPUTING, COMMUNICATION, AND INTELLIGENT SYSTEMS (ICCCIS)
(2021)
Article
Chemistry, Multidisciplinary
V Srimurugan, C. G. Jothiprakash, R. Prasanth
Summary: A stoichiometrically stable CdS/TiO2 heterostructured electrode was developed for efficient photoelectrochemical conversion, with CdS evenly distributed over TiO2 nanotubes. The electrode exhibited a stable photocurrent density of 3.5 mA cm(-2) and achieved a high H-2 production rate of 1.1 ± 0.03 mmol h(-1) g(-1) without any co-catalysts. The significance of CdS/TiO2 stoichiometry towards efficient hydrogen production was discussed in detail.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
Lambert K. van Vugt, Sven Ruhle, Prasanth Ravindran, Hans C. Gerritsen, Laurens Kuipers, Daniel Vanmaekelbergh
PHYSICAL REVIEW LETTERS
(2006)
