Article
Nanoscience & Nanotechnology
G. Sriharan, S. Harikrishnan, Hafiz Muhammad Ali
Summary: The thermal performance of different hybrid nanofluids on a mini hexagonal tube heat sink was experimentally investigated, and it was found that the Al2O3/CuO-DIW nanofluids exhibited higher heat transfer efficiency.
Article
Chemistry, Multidisciplinary
Mohd Zulkifly Abdullah, Kok Hwa Yu, Hao Yuan Loh, Roslan Kamarudin, Prem Gunnasegaran, Abdusalam Alkhwaji
Summary: The study found that the density, thermal conductivity, and viscosity of Cu-Ni hybrid nanofluids increase with volume fraction, while the specific heat capacity at constant pressure decreases with volume fraction.
Article
Energy & Fuels
Yu Qiao, Wen Sheng, Chen He, Changhui Liu, Zhonghao Rao
Summary: The study found that nonionic surfactants showed the best performance in terms of static stability, and that graphene-filled nanofluids demonstrated enhanced thermal conductivity, leading to a 27% increase in heat transfer coefficient.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Abdul Rehman, Sana Yaqub, Majid Ali, Hassan Nazir, Nadia Shahzad, Sehar Shakir, Rabia Liaquat, Zafar Said
Summary: This study investigates the influence of eight surfactants on the properties of hybrid nanofluids containing Aluminum oxide (Al2O3) and Titanium dioxide (TiO2). The results show that polyvinylpyrrolidone (PVP) exhibits the highest stability among all surfactants, while polyethylene glycol (PEG) shows the highest viscosity enhancement. Additionally, all the nanofluids exhibit Newtonian behavior. The study emphasizes the potential of PVP as a surfactant for long-term heat transfer applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Thermodynamics
Waqar Ahmed, Nor Azwadi Che Sidik, Shahid Mehmood, Mir Waqas Alam, H. Fayaz, Muhammad Iqbal Hussain, Omer A. Alawi, Syed Muzamil Ahmed, Syed Nadeem Abbas Shah, S. N. Kazi
Summary: The current research focuses on the chemical synthesis of zinc oxide (ZnO) and preparation of ZnO dispersed in EG@DW mixture-based nanofluids for enhancing heat transfer in a square shaped heat exchanger. The study shows that the addition of ZnO at certain mass concentrations can significantly improve thermal conductivity and has good stability and dispersion.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Review
Thermodynamics
Naman Parashar, Syed Mohd Yahya
Summary: Hybrid nanofluids are gaining popularity due to their superior thermophysical properties compared to mono nanofluids. The properties of hybrid nanofluids can be adjusted by changing the type and mixture ratio of nanoparticles. Various parameters, including nanoparticles mixture ratio and relative diameter, have been found to affect the thermophysical and rheological properties of hybrid nanofluids.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Multidisciplinary Sciences
Anwar Saeed, Poom Kumam, Taza Gul, Wajdi Alghamdi, Wiyada Kumam, Amir Khan
Summary: This study provides a detailed analysis of the properties of couple stress hybrid nanofluid under various influencing factors, such as permeability, couple-stress, and magnetic parameters. The impact of these factors on velocity and temperature distribution, as well as on pH values and electric conductivity, are discussed and analyzed.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Mohamad Noor Izwan Johari, Irnie Azlin Zakaria, W. H. Azmi, W. A. N. W. Mohamed
Summary: The study found that using Al2O3-SiO2 hybrid nanofluids as a cooling liquid for PEMFC instead of conventional ethylene glycol can significantly improve thermal conductivity and electrical conductivity, thereby enhancing energy conversion efficiency.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Multidisciplinary
Yuwei Wang, Jie Yu, Cong Qi, Wenjie Zhang
Summary: In this paper, the thermophysical properties and thermo-hydraulic performance of nanofluids in microchannels are reviewed, and the methods to improve the heat dissipation capability of microchannel heat sinks are analyzed from both thermal and flow perspectives.
Article
Thermodynamics
Saifuddin Khalid, Irnie Zakaria, W. H. Azmi, W. A. N. W. Mohamed
Summary: The study demonstrates that in PEM fuel cell applications, the 10:90 ratio of Al2O3-SiO2 hybrid can achieve optimal performance, with thermal and electrical conductivity decreasing as the percentage of Al2O3 increases, while viscosity performance exhibits the opposite trend. Considering the dominance of thermal properties over viscosity and electrical conductivity, the 10:90 ratio is the most suitable for implementation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Gokberk Yalcin, Semiha Oztuna, Ahmet Selim Dalkilic, Somchai Wongwises
Summary: This study investigates the thermal properties of water-based ZnO-SiO2 hybrid nanofluids and confirms their potential applications in various thermal systems by experimentally determining thermal conductivity and dynamic viscosity values. The results show that ZnO-SiO2 hybrid nanofluids can enhance system heat transfer rate and efficiency, reduce pressure drop, and power consumption, indicating promising prospects for their use in different thermal applications.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Zafar Said, Shek Rahman, Prabhakar Sharma, Ahmed Amine Hachicha, Salah Issa
Summary: This study utilized MWCNT/water nanofluids to enhance the performance of a shell and tube heat exchanger, showing significant improvements in heat transfer coefficient and overall efficiency. Experimental and numerical results demonstrated enhancements with a 0.3% volume fraction and the addition of semicircular baffles. The MLP-ANN based predictive model showed robust forecasting capability with high efficiency values.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Sumit Kumar Singh, Jahar Sarkar
Summary: The study shows that using a diverging wire coil insert in the concentric tube heat exchanger results in better thermohydraulic performance, and the combination of nanofluids and wire coil inserts shows promising results with a thermal performance factor greater than 1.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Mingyan Ma, Yuling Zhai, Peitao Yao, Yanhua Li, Hua Wang
Summary: The study found that increasing the concentration of surfactant can improve the stability and viscosity of hybrid nanofluids. Among the surfactants tested, PVP showed the highest stability and contributed to the highest thermal conductivity enhancement at optimal concentrations.
Review
Chemistry, Multidisciplinary
Mohammad M. Rashidi, Mohammad Alhuyi Nazari, Ibrahim Mahariq, Mamdouh El Haj Assad, Mohamed E. Ali, Redhwan Almuzaiqer, Abdullah Nuhait, Nimer Murshid
Summary: The thermal performance of energy conversion systems is crucial for efficiency improvement and depends heavily on the thermophysical features of the applied fluids. Increasing the volume fraction of solids can enhance thermal conductivity and dynamic viscosity, while the variation trend of specific heat depends on the base fluid. Higher temperature leads to increased thermal conductivity but decreased dynamic viscosity.
Article
Thermodynamics
Chung-Yu Yeh, K. J. F. Boonk, Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study explores a compact design of storage-integrated solar thermal collector and investigates the use of a shape stabilized phase change material (PCM) to improve the energy efficiency of a typical solar domestic water heating system. Experimental testing and numerical modeling were conducted to analyze the thermal properties of the developed PCM. The results show that optimizing the collector design can significantly extend the discharging period and improve the charging rate.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Sahand Rahemipoor, Mohammad Kohestanian, Ali Pourjavadi, Hossein Heidarzadeh Vazifehkhorani, Mehdi Mehrali
Summary: Multistimuli-responsive hyperbranched polymers were successfully synthesized in one step using RAFT-SCVP, showing controlled properties for potential sensor applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Energy & Fuels
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: Investigations into the design of compact PCM-solar systems have shown that integrated flat plate storage systems are predominantly used for space heating, while concentrating solar collectors are primarily utilized in industrial applications, employing different phase change materials to provide varying temperature levels.
Article
Polymer Science
Agustinus Purna Irawan, Deni Fajar Fitriyana, Cionita Tezara, Januar Parlaungan Siregar, Dwinita Laksmidewi, Gregorius Dimas Baskara, Mohd Zulkfly Abdullah, Ramli Junid, Agung Efriyo Hadi, Mohammad Hazim Mohamad Hamdan, Najid Najid
Summary: The braking system plays a crucial role in automotive safety. The durability and quality of brake pads are vital for their effective functioning. Asbestos, a harmful material, has been widely used in brake pad manufacturing but efforts are being made to find natural alternatives. This review focuses on analyzing the key parameters affecting brake pad performance and discusses the composition of fillers and fiber reinforcements in polymer composites.
Review
Chemistry, Multidisciplinary
Aziz Maleki, Matineh Ghomi, Nasser Nikfarjam, Mahsa Akbari, Esmaeel Sharifi, Mohammad-Ali Shahbazi, Mehraneh Kermanian, Mohammed Seyedhamzeh, Ehsan Nazarzadeh Zare, Mehdi Mehrali, Omid Moradi, Farshid Sefat, Virgilio Mattoli, Pooyan Makvandi, Yu Chen
Summary: MXenes, as a new subclass of 2D materials, have shown great potential in biomedical applications, especially in drug delivery, tissue engineering, and biosensors. The integration of MXenes into hydrogels can enhance the electrical conductivity and mechanical properties of scaffolds, making it significant for biomedical engineering.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mohd Zulkifly Abdullah, Kok Hwa Yu, Hao Yuan Loh, Roslan Kamarudin, Prem Gunnasegaran, Abdusalam Alkhwaji
Summary: The study found that the density, thermal conductivity, and viscosity of Cu-Ni hybrid nanofluids increase with volume fraction, while the specific heat capacity at constant pressure decreases with volume fraction.
Article
Chemistry, Physical
Amir Reza Akhiani, Hendrik Simon Cornelis Metselaar, Bee Chin Ang, Mehdi Mehrali, Mohammad Mehrali
Summary: This study introduces a new approach for facile assembly of graphene nanoplatelet (GNP) to overcome the practical application issues of phase change materials (PCMs) in solar-thermal technology. The embedded GNP enhances the loading of paraffin wax and transition enthalpy, resulting in excellent solar-thermal storage efficiency.
MATERIALS TODAY ENERGY
(2022)
Article
Thermodynamics
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study addresses the issue of storage tank requirement in solar water heaters by experimentally applying a shape-stabilized phase change material (PCM) to a tankless solar collector. The research found that the thermal efficiency of the collector-storage system was significantly improved, showing potential for energy storage. Changing the flow rate had a limited impact on heat gain, but high flow rates reduced the discharge efficiency. Furthermore, the proposed system showed promising results in terms of cost savings and reduction in CO2 emissions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Vignesh Vicki Wanatasanappan, Munirah Rezman, Mohd Zulkifly Abdullah
Summary: This study investigates the thermophysical properties of vegetable base oils suspended with Al2O3-TiO2 nanoparticles. The results show that palm oil-based hybrid nanofluids exhibit superior thermal conductivity and viscosity, making them suitable for enhancing the performance of insulation oil in the electrical power sector.
Article
Construction & Building Technology
Navid Ranjbar, Carsten Kuenzel, Carsten Gundlach, Paul Kempen, Mehdi Mehrali
Summary: This study investigates the role of halloysite nanotube as a mineral-based thixotropic admixture to 3D printable geopolymer mortar. The first part of the study focuses on the thermal evolution of halloysite at different temperatures. The second part examines how calcination and concentration of halloysite affect the properties of 3D-printable geopolymer mortar. It was found that the addition of 1-2 wt% halloysite significantly improves the rheological properties and buildability of the mortars without compromising their mechanical strength.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Isam Qasem, Ahmed A. Hussien, Khalideh A. Alrawashdeh, Pramodkumar S. Kataraki, Ayub Ahmed Janvekar
Summary: One of the most challenging tasks in machining hard materials is to achieve super high precision with excellent surface finish. Abrasive water jet (AWJ) machining is proven technology for generating high precision components. This study aimed to showcase the technical parameters and their impact on kerf taper and surface roughness. Experimental data showed that variations in traverse speed, water pressure, and abrasive feed rate greatly influenced the kerf taper and surface roughness. ANOVA analysis using MINITAB 19 was conducted to study the behavior of the kerf taper angle.
ANNALES DE CHIMIE-SCIENCE DES MATERIAUX
(2023)
Article
Green & Sustainable Science & Technology
Sahand Rahemipoor, Masoud Hasany, Mohammad Mehrali, Kristoffer Almdal, Navid Ranjbar, Mehdi Mehrali
Summary: The advent of 3D printing revolutionizes conventional construction by providing a cost-effective and fast method for constructing complex structures. This study presents an environmentally friendly approach by integrating Macroencapsulated Phase Change Materials (MEPCM) into a 3D printable geopolymer paste (GPP) derived from fly ashes, promoting sustainable buildings and reducing energy consumption.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Faezeh Rostamian, Nasrin Etesami, Mehdi Mehrali
Summary: In this study, microencapsulation of phase change materials (PCMs) was conducted for temperature management of satellite electronic boards. The synthesized microcapsules showed stability and a significant delay in reaching critical temperature, indicating the effectiveness of microencapsulated PCMs (MPCMs) in temperature management. The results demonstrate that MPCMs are a promising approach for managing the temperature of satellite electronic boards.
APPLIED THERMAL ENGINEERING
(2024)
Article
Materials Science, Multidisciplinary
Sahand Rahemipoor, Mohammad Kohestanian, Ali Pourjavadi, Hossein Heidarzadeh Vazifehkhorani, Mehdi Mehrali
Summary: In this study, multistimuli-responsive hyperbranched polymers were successfully synthesized in one step using the RAFT-SCVP method, allowing for control of molecular weights and degree of branching. These smart hyperbranched polymers exhibit responses to various stimuli such as UV-vis or sunlight, pH changes, and temperature changes.
ACS APPLIED POLYMER MATERIALS
(2022)
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)
