Article
Thermodynamics
Janki Shah, Mukesh Ranjan, Prachi Thareja, Patrice Estelle
Summary: The objective of this research is to examine how ultrasonication time affects the properties of CuO nanofluid. It is found that at an optimal sonication time of 80 min, the particle dispersion is more stable, and the nanofluid has the lowest viscosity and maximum thermal conductivity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
A. G. N. Sofiah, M. Samykano, S. Shahabuddin, K. Kadirgama, A. K. Pandey
Summary: A new class of nanofluids containing CuO nanoparticles, PANI nanofibers, and CuO-PANI nanocomposites dispersed in RBDL base fluids were successfully prepared and characterized. The study showed that CuO/RBDL nanofluid had poor stability, while PANI/RBDL and CuO-PANI/RBDL exhibited good stability and enhanced thermal conductivity.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
S. Khamlich, J. Jakobi, T. Khamliche, F. Ismail, O. Nemraoui, C. Rehbock, V. Fester, S. Barcikowski
Summary: As an important method for green energy production, the use of nanofluids to enhance the thermophysical properties of solar thermal energy systems is a highly relevant topic. However, the colloidal stability of nanofluids is often impaired during high-temperature processing when nanoparticles are added, which is related to particle size, morphology, and concentration. In this study, we synthesized nanofluids composed of ligand-free colloidal CuNPs dispersed in ethylene glycol through a laser ablation in liquids synthesis method, and observed a nanoparticle surface area-dependent enhancement of thermal conductivity. These findings highlight the suitability of laser-fabricated ligand-free CuNPs as additives for heat transfer fluids in mid-temperature heat transfer applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Hamed Eshgarf, Afshin Ahmadi Nadooshan, Afrasiab Raisi, Masoud Afrand
Summary: This paper experimentally evaluates the viscosity and thermal conductivity of Fe3O4/water nanofluid and proposes an estimation model using an artificial neural network. The results indicate that the volume fraction of nanoparticles and temperature have a direct relationship with the thermal conductivity coefficient of nanofluids, while the viscosity of the nanofluid decreases with the decrease in volume fraction of nanoparticles and increases with the decrease in temperature. The neural network shows fewer errors and higher accuracy in predicting the viscosity and thermal conductivity of nanofluids.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Mohanan Vasanthakumari Bindu, Gnana Muthu Joselin Herbert
Summary: By adjusting the volume concentration of nanoparticles, a ternary nanofluid composed of Al2O3, ZnO, and multiwall carbon nanotubes demonstrates significant improvements in thermal conductivity and viscosity, making it suitable for medium-temperature heat transfer applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Hemmat Esfe, Soheyl Alidoust, Saeed Esfandeh, Davood Toghraie, Hossein Hatami, Mohammad Haassan Kamyab, Erfan Mohammadnejad Ardeshiri
Summary: In this study, the effect of basic parameters, such as solid volume fraction and temperature, on the thermal conductivity of SWCNT-CuO(25:75)/water nanofluid was investigated. The experimental results showed that the solid volume fraction had a significant impact on the relative thermal conductivity, and the optimum temperature for thermal conductivity was 50 degrees Celsius. A new relationship was established using the response surface methodology, and a comparison with other nanofluids was made.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Thermodynamics
Mohammad Hemmat Esfe, Soheyl Alidoust, Davood Toghraie
Summary: This research aims to find an optimal nanofluid for industrial applications by comparing two water-based nanofluids. The first nanofluid showed a higher thermal conductivity enhancement of 37.10% compared to the second nanofluid, which only had a 16.20% increase.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
J. Sathish Kumar, G. Senthilkumar, S. Ramachandran
Summary: The research aims to address the issue of poor thermal conductivity caused by the spherical form of CuO nanoparticles by using polyhedral-shaped MgO nanoparticles. The study introduces a novel approach of adding MgO nanoparticles to improve thermal conductivity and provides experimental data to support this strategy.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Rohinee M. Barai, Devesh Kumar, Atul Wankhade, Aamir R. Sayed, Anup A. Junankar
Summary: Nanofluids, with their remarkable thermal characteristics and potential applications, are expected to play a significant role in future thermal management systems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Sara Rostami, Davood Toghraie, Behrooz Shabani, Nima Sina, Pouya Barnoon
Summary: In this paper, artificial neural networks were developed to predict the thermal conductivity of multi-walled carbon nanotubes-CuO/water nanofluid, with the best ANN model and curve fitting method used to predict the behavior of the nanofluid. Results showed that the ANN outperformed in predicting k(nf) with better performance and correlation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Environmental Sciences
S. K. Mandal, P. K. Singh, S. Kumar, S. K. Mishra
Summary: Global warming is increasing rapidly, making it one of the biggest challenges of today. Researchers are focusing on utilizing renewable energy resources, such as solar energy, to minimize the effects of global warming.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Zeyu Liu, Xin Wang, Hongtao Gao, Yuying Yan
Summary: This research aims to experimentally study the viscosity and thermal conductivity of water-based Fe3O4 nanofluid with highly disaggregated nanoparticles. The experimental results show that modified Fe3O4 nanofluid exhibits good viscosity and thermal conductivity when nanoparticles are highly disaggregated.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Hasan Naghizadeh, Reza Nosouhi, Seyed Adel Badiezadegan, Milad Soleymani, Amir Mohammad Azadi, Noushin Azimy, Hamidreza Azimy
Summary: This research investigates the effect of adding copper oxide nanoparticles to the oil Gr-6004 base fluid and its concentration changes on the surface roughness of gudgeon pin and the thermal conductivity of the nanofluids during the superfinishing process. The results show that adding nanoparticles significantly reduces the surface roughness and increases the thermal conductivity. Increasing the concentration of nanoparticles further decreases the roughness and increases the thermal conductivity. Dispersing CuO nanoparticles into the base fluid also reduces the oil temperature.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Multidisciplinary
Dharmendra K. Bal, Mohammed R. Chandan, Rohan Taneja, Rakesh R. Tiwari, Shaik Saboor, Debasish Mishra, Aritra Ghosh, Aabid Hussain Shaik
Summary: This study successfully prepared oxidation-resistant copper nanoparticles using biocompatible polymers, polyacrylamide and xanthan gum, and utilized them to create nanofluids and nanohydrogels with high stability and enhanced thermal conductivity.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Energy & Fuels
Praveen Kanti, K. Sharma, Kyathanahalli Marigowda Yashawantha, Mehdi Jamei, Zafar Said
Summary: The study investigated the thermal conductivity and viscosity of fly ash-copper hybrid nanofluid for solar energy applications, showing significant enhancements in dynamic viscosity and thermal conductivity at specific concentrations and temperatures. Models were proposed to estimate the nanofluid properties, and a neural network was utilized to predict effective thermal conductivity and relative viscosity. The outcomes were used to calculate Mouromtseff number and heat transfer efficiency for solar energy applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Thermodynamics
M. Neelesh Chandran, S. Manikandan, K. S. Suganthi, K. S. Rajan
Article
Multidisciplinary Sciences
K. S. Rajan, S. Swaminathan, S. Vaidhyasubramaniam
Article
Thermodynamics
B. Sivapalan, M. Neelesh Chandran, S. Manikandan, M. K. Saranprabhu, S. Pavithra, K. S. Rajan
ENERGY CONVERSION AND MANAGEMENT
(2018)
Article
Electrochemistry
P. Vishnu Vardhan, Mustapha Balarabe Idris, S. Manikandan, K. S. Rajan, S. Devaraj
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2018)
Article
Chemistry, Physical
S. Pavithra, S. Manikandan, M. K. Saranprabhu, B. Sivapalan, K. S. Rajan
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Thermodynamics
Leela Vinodhan Vajravel, Suganthi Kuppusamy Swaminathan, Sivapalan Baskaran, Rajan Kalpoondi Sekar
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Nanoscience & Nanotechnology
M. K. Saranprabhu, K. S. Rajan
APPLIED NANOSCIENCE
(2019)
Article
Green & Sustainable Science & Technology
M. K. Saranprabhu, K. S. Rajan
Article
Electrochemistry
Muthaiyan Lakshmanakumar, Swaminathan Sethuraman, K. S. Rajan, Uma Maheswari Krishnan, John Bosco Balaguru Rayappan
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2020)
Article
Energy & Fuels
M. K. Saranprabhu, D. Chandini, P. Bharathidasan, S. Devaraj, K. S. Rajan
Article
Electrochemistry
P. Bharathidasan, Thiruvenkatam Subramaniam, D. Chandini, S. R. Sivakkumar, K. S. Rajan, S. Devaraj
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Green & Sustainable Science & Technology
Dineshkumar Mani, M. K. Saranprabhu, K. S. Rajan
Summary: The study explored using copper nanoparticles as additives to develop copper-pentaerythritol composites, resulting in improved thermal conductivity without loss of enthalpy for solid-solid phase transition.
Article
Thermodynamics
M. K. Saranprabhu, K. S. Suganthi, K. S. Rajan
Summary: This study investigates the impact of adding CuO nanoparticles on the thermal properties of solar salt, revealing that the addition of CuO nanoparticles can enhance the thermal conductivity of solar salt at certain concentrations but can also influence the α-KNO3 to β-KNO3 transition at higher temperatures.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2022)
Article
Materials Science, Multidisciplinary
K. S. Suganthi, K. Harish, Nitheesh M. Nair, P. Swaminathan
FLEXIBLE AND PRINTED ELECTRONICS
(2018)
Article
Engineering, Chemical
R. Yedhu Krishnan, K. S. Rajan
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2017)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
