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Article
Thermodynamics
Lu Zhou et al.
Summary: The aggregation state of nanoparticles affects the thermal conductivity of nanofluids, with the interaction at the solid-liquid interface and changes in aggregation morphology playing important roles in determining heat transfer efficiency. Nanoparticle aggregates with chain-like structures maximize thermal conductivity due to enhanced interaction between atoms, providing more efficient heat transfer.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
P. Selvan et al.
Summary: In this study, thermal conductivity and stability of aqueous nanofluid were enhanced by suspending SiO2 and Ag nanoparticles in different volumetric percentages, using CaCO3 nanoparticles as a stabilizer. Nanofluids prepared by mixing these nanoparticles in various ratios displayed higher stability and thermal conductivity compared to nanofluids prepared using pristine nanoparticles.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Julian Traciak et al.
Summary: The article focuses on the physical properties of nanofluids based on ethylene glycol (EG) with dispersed zirconium dioxide (ZrO2) nanoparticles, and the effect of nanoparticle volume fraction on the physical properties of the nanofluids was determined through experiments.
PHYSICS AND CHEMISTRY OF LIQUIDS
(2022)
Article
Engineering, Chemical
Wei Cui et al.
Summary: This study investigates the factors influencing the effective thermal conductivity of nanofluids and reveals that temperature, nanoparticle concentration, and nanoparticle shape play significant roles. Experimental data and artificial intelligence models were used to determine the optimal AI-based model for estimating the relative thermal conductivity of nanofluids.
Article
Engineering, Chemical
Jibang Liao et al.
Summary: Equilibrium molecular dynamic simulations were used to study the thermal conductivity of Cu-Ar nanofluid with different initial aggregation structures. The study found that particle size determines the aggregation structure of nanoparticles, and diffusion-limited aggregation has a greater enhancement efficiency on the thermal conductivity of nanofluids compared to reaction-limited aggregation. The different aggregation structures may affect the diffusion coefficient of nanofluidic systems, thereby influencing the thermal conductivity of nanofluids.
Article
Materials Science, Multidisciplinary
Surendran V. Sujith et al.
Summary: Energy consumption in the industrial sector can be significantly reduced by improving heat transfer rates using nanofluids. This article reviews the thermophysical properties of metal oxide-based nanofluids and discusses important parameters and theories for controlling their stability. It also explores predictions of thermophysical properties using various correlations and evaluates the heat transfer efficiencies of nanofluids in the laminar and turbulent regimes. The potential industrial applications and future research opportunities of metal oxide-based nanofluids are also discussed.
Article
Thermodynamics
Hammad Younes et al.
Summary: This review discusses the applications of nanofluids and their impact on thermal behavior and thermal conductivity by examining various parameters. It highlights the challenges and limitations posed by these parameters on heat transfer and commercialization efforts of nanofluids.
APPLIED THERMAL ENGINEERING
(2022)
Review
Chemistry, Physical
Amol S. Patil et al.
Summary: Rare earth elements have gained attention due to their unique properties and diverse applications. Various synthetic methods can be used to prepare rare earth-based nanomaterials. These nanomaterials have wide-ranging applications across multiple fields.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Thermodynamics
O. Al-Oran et al.
Summary: A new type of water-based hybrid nanofluid was studied, showing a significant increase in thermal conductivity coefficient at high concentrations and temperatures, with a maximum enhancement of 13%. The relative viscosity increases with concentration, reaching a maximum of 8.85%. Calculated experimental results demonstrate good accuracy with proposed correlations for thermal conductivity ratio and relative viscosity.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2022)
Article
Chemistry, Physical
Yanhua Li et al.
Summary: The requirements for high efficient heat exchange technology are increasing in many fields. Nanofluids have attracted extensive attention due to their enhanced thermal conductivity. In this study, molecular dynamics simulations were used to establish nanofluid models with different volume fractions, and the simulation results were validated with experimental data. The mechanism of thermal conductivity enhancement was revealed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Weizhun Jin et al.
Summary: New nanofluids based on graphene and GR/MXene were prepared to enhance thermal conductivity. The addition of MXene improved the dispersion stability of GR nanofluids and maintained high thermal conductivity while reducing viscosity.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Kimia Jafari et al.
Summary: The present study aimed to develop cost-effective and eco-friendly nanofluids by dispersing magnesium oxide (MgO) nanoparticles in binary and ternary deep eutectic solvents (DES) through a two-step method. The experimental results showed that adding nanoparticles and water content can increase the thermal conductivity of nanofluids.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Ceramics
Yushuang Huang et al.
Summary: Microchannel technology is an effective method for heat transfer in microelectronics, and nanofluids have great potential for application in microchannel heat exchangers. In this experiment, beta-cyclo-dextrin was used to modify ZrO2 nanoparticles and the properties of the modified nanoparticles were studied. The results showed that the modified nanofluid had better stability and higher thermal conductivity compared to the base fluid. Mathematical analysis indicated that beta-cyclodextrin-modified ZrO2 nanofluids have great potential for heat transfer in microelectronic microchannels.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Qian Xu et al.
Summary: Adding nanoparticles to the conventional working fluid can improve the heat transfer performance of two-phase closed thermosyphon solar collectors. Doping TiO2 with Al2O3 can further enhance the thermal performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Aws S. Al-Janabi et al.
Summary: This experimental study focused on the impact of Cetrimonium bromide (CTAB) surfactant on the stability and thermal conductivity of different categories of nanolubricants. It revealed significantly different optimal CTAB ratios for various categories of nanolubricants and showed an improvement of 2% to 7% in thermal conductivity compared to pure oil.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Thermodynamics
Mehmet Senan Yilmaz et al.
Summary: This study experimentally investigated the effects of Al2O3-water nanofluids with different volume concentrations on heat transfer and pressure drop in a mini-channel shell and tube heat exchanger. The results showed that the nanofluids increased the convective heat transfer coefficient in the transition and turbulent regions and extended the transition region. The nanofluids had higher friction factors compared to water. The study also found the optimal volumetric concentration and flow rate for the nanofluids to enhance heat transfer in the heat exchanger.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Review
Chemistry, Physical
Bhavin Mehta et al.
Summary: Nanofluid, with its excellent thermophysical properties, is highly suitable for heat transfer applications. The stability of nanofluid plays a crucial role in enhancing its thermophysical properties. Various parameters such as base fluid type, nanoparticle type, surfactant type, and preparation method affect the stability of nanofluid. This article provides a comprehensive review of synthesis techniques, stability evaluation, enhancement techniques, and the impact of parameters on thermophysical properties of nanofluid. The article also discusses the suitability of nanofluid in different heat transfer applications and includes an economic analysis.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Julian Traciak et al.
Summary: This paper proposes an empirical model for the surface tension of nanofluids and presents a mechanism for the influence of nanoparticles on this property. It explains the processes causing an increase or decrease in the surface tension and why the value changes within a certain range with increasing nanoparticle concentration. Experimental studies were conducted to verify the model, and the results were consistent with the predicted surface tension values.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Zafar Said et al.
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
Jin Wang et al.
Summary: The experimental investigation on the viscosity of nanofluids with Fe3O4 nanoparticles and carbon nanotubes (CNTs) showed new empirical formulas for accurate viscosity predictions. Surfactants like TMAH, SDS, and SLS were found to improve stability, reduce viscosity, and enhance thermal conductivity in Fe3O4-water, CNT-water, and Fe3O4-CNT-water nanofluids. The CNT-water and Fe3O4-CNT-water nanofluids exhibited shear-thinning behavior, while water-based Colace-Fe3O4, TMAH-Fe3O4, and TSC-Fe3O4 nanofluids displayed linear rheological behavior.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Rashid Pourrajab et al.
Summary: The synergistic effect of MWCNTs-COOH and Ag nanoparticles on the thermal conductivity improvement of hybrid nanofluids is experimentally demonstrated in this paper. A new thermal conductivity ratio correlation is suggested based on empirical data, showing high accuracy and capability in modeling thermal conductivity ratio data.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Andac Batur Colak
Summary: In this study, five different water-based ZrO(2)nanofluids were prepared at different concentrations, and their thermal conductivity was experimentally measured. Using the data obtained, an artificial neural network and a new correlation were developed to predict the thermal conductivity values, showing perfect agreement with the experimental data.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
Humphrey Adun et al.
Summary: This paper focuses on the specific heat capacity of hybrid nanofluids and presents the synthesis, characteristics, and stability of these fluids. The study shows that volume concentration and temperature are crucial factors influencing the specific heat capacity of hybrid nanofluids.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Jia-nan Huang et al.
Summary: Many studies have shown that low concentrations of graphene can significantly increase the thermal conductivity of nanofluids, which cannot be explained by conventional thermal conductivity models. A new model considering the effects of graphene's length and thickness, interface layer, and anisotropic characteristics is established in this paper. The predicted thermal conductivity is positively correlated with temperature, concentration, and nanoparticle length, while slightly negatively correlated with thickness.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Xin Cui et al.
Summary: The study suggests that the addition of Janus nanoparticles into a fluid, known as Janus nanofluids, can significantly enhance the thermal conductivity compared to common nanofluids. This enhancement is attributed to the increased Brownian motion of Janus nanoparticles, leading to improved energy transfer within nanofluids. The findings provide insights for the design of nanofluids with high thermal conductivity.
Article
Thermodynamics
Muhammad Ibrahim et al.
Summary: The thermal conductivity of nanofluids is influenced by the type of nanoparticles and base fluid, with an increase in thermal conductivity observed with higher volume fractions and temperatures. Both ANN and RSM models are effective in predicting the thermal conductivity ratio of nanofluids and have high accuracy in estimating the TCR values.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Review
Chemistry, Multidisciplinary
Govindasamy Rajakumar et al.
Summary: Yttrium oxide nanoparticles are highly sought after in technical applications due to their favorable properties such as high dielectric constant and thermal stability. They are utilized in a variety of fields, including biological imaging and photodynamic therapies, and exhibit attractive antibacterial and antioxidant properties. However, there are also some drawbacks associated with their use.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Chemical
Weikai Ji et al.
Summary: The preparation, stability, thermal properties, and prediction of TiO2-Ag hybrid nanofluids were studied in this research. Ultrasonication treatment was found to alleviate the sedimentation of nanofluids, and artificial neural networks were established to effectively predict the thermal properties of nanofluids, saving experiment time and cost.
Article
Multidisciplinary Sciences
Mohammad Hemmat Esfe et al.
Summary: The study optimized the thermophysical properties of water-ethylene glycol mixture-based CNT nanofluid using the NSGA-II method, investigating the effects of temperature and volume fraction parameters. Results showed that the MLP model outperformed RSM in predicting relative thermal conductivity, viscosity, and specific heat, with the volume fraction parameter being more important than temperature.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
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(2014)
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JOURNAL OF COLLOID SCIENCE AND BIOTECHNOLOGY
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