Article
Engineering, Chemical
Meng Xia Wang, Behnam Almasi, Zainab Ali Bu Sinnah, Hasan Sh. Majdi, Farag M. A. Altalbawy, Davood Toghraie, Ibrahem Waleed, Rahman S. Zabibah, Usama S. Altimari, Yun Xiang Zhang
Summary: This study investigates the thermal conductivities of Ag-CuO-tungsten oxide/water ternary hybrid nanofluids with different mixing ratios, as well as other mono and hybrid nanofluids. The results show that increasing temperature and volume fraction of nanoparticles both increase the thermal conductivity. The Ag/water nanofluids with a volume fraction of 0.4% and temperature of 50℃ exhibit the highest thermal conductivity. A mathematical model is proposed to estimate the thermal conductivity of Ag-CuO-tungsten oxide/water ternary hybrid nanofluids.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Review
Thermodynamics
Bhrant Kumar Dandoutiya, Arvind Kumar
Summary: Heat transfer is desirable in various industries, and nanofluids are developed to enhance the heat transfer rate by adding nanoparticles to existing fluids. Mathematical models have been developed to predict the thermal conductivity of nanofluids, and experimental data show that these models provide accurate predictions when the volume fraction is low.
Review
Thermodynamics
Junhao Li, Xilong Zhang, Bin Xu, Mingyu Yuan
Summary: Nanofluids, known for their unique thermal conductivity, have been widely utilized across various fields. Recent studies have shown the emergence of new nanofluids with even higher thermal conductivity. Neural network prediction models are expected to become the primary method for thermal conductivity prediction in the future. Current research is focused on reviewing and evaluating influencing factors, prediction models, and applications of nanofluids.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
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
Physics, Applied
Noha M. M. Seyam
Summary: This paper analyzed the numerical method for modeling the behavior of nanofluid within a closed container in the presence of Lorentz force. The working fluid consisted of water and two types of nanoparticles. The porous geometry had a sinusoidal inner surface facing constant heat flux. The effects of gravity and vertical Lorentz force were complex and the momentum equations were edited to include relevant source terms. The accuracy of the code was tested and good agreement was obtained. The influences of nanoparticle loading and the strength of gravity and buoyancy forces were analyzed in the results section. Loading nanoparticles resulted in an increase in Nu by 26.99% and 41.04% for Ha = 0 and 15. Increasing buoyancy led to a rise in Nu by 44.34% and 1.46% in the absence and presence of Ha. Applying Lorentz force decreased Nu by 40.39% for Ra = 700.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Engineering, Chemical
Amin Dezfulizadeh, Alireza Aghaei, Ali Hassani Joshaghani, Mohammad Mahdi Najafizadeh
Summary: This study experimentally investigated the dynamic viscosity and thermal conductivity of Cu-SiO2-MWCNT/water ternary hybrid nanofluid, proposing linear mathematical correlations for estimation. By combining metal and metal oxide nanoparticles with ternary polymers nanoparticles, a novel nanofluid was fabricated. Results showed that both thermal conductivity and dynamic viscosity were dependent on temperature and volume concentration, with the ternary hybrid nanofluid exhibiting significantly greater properties compared to mono and binary nanofluids.
Article
Thermodynamics
Huan Wang, Zhenghua Rao, Wei Wang, Shengming Liao
Summary: By reconstructing the Hamilton-Crosser model with considerations of particle clustering and nanolayer, an improved model for the effective thermal conductivity (ETC) of nanofluids is established in this study. The model shows higher accuracy compared to previous ones and can explain the inconsistency phenomena in ETC data of nanofluids.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Likhan Das, Khairul Habib, Kashif Irshad, Rahman Saidur, Salem Algarni, Talal Alqahtani
Summary: The current research focuses on formulating a new class of Therminol55-based nanofluids that incorporate an MXene/Al2O3 nanocomposite as a dispersant. The optical and thermophysical properties of the nanofluids are experimentally assessed, and the surface charge and chemical stability of the composite particles are evaluated. The results show that the formulated nanofluid has high thermal conductivity and low viscosity, making it suitable for use as a heat transfer fluid.
Review
Energy & Fuels
Pinar Eneren, Yunus Tansu Aksoy, Maria Rosaria Vetrano
Summary: This article reviews the research on heat transfer enhancement using nanofluids in microchannel heat sinks over the past 20 years. It discusses the stability, thermal conductivity, particle clustering, and particle-surface interactions of nanofluids, as well as the relevant works on convective heat transfer in microchannel heat sinks operated with nanofluids.
Article
Chemistry, Multidisciplinary
Nikita Gupta, Shipra Mital Gupta, S. K. Sharma
Summary: In recent years, there has been significant research on heat transfer applications of CNT nanofluid due to its high thermal conductivity compared to conventional fluids. However, the hydrophobic nature of CNT poses a challenge for dispersion in polar basefluid. The use of surfactants can help disperse CNT, but they have some disadvantages such as foam formation, stickiness, and viscosity enhancement. This study presents an alternative method by preparing Cu-CNT hybrid nanoparticles in-situ and dispersing them in double distilled water without surfactant, resulting in a stable nanofluid with good dispersibility and high thermal conductivity.
Article
Multidisciplinary Sciences
Hanifa Hanif, Sharidan Shafie
Summary: This research investigates the use of nanofluids as coolants to improve the cooling process in an electrical power system. The study takes into account the exceptional characteristics of nanofluids and considers the effects of heat radiation, viscous dissipation, and Newtonian heating. The numerical simulations and results obtained using MATLAB software are presented graphically.
SCIENTIFIC REPORTS
(2022)
Article
Mathematical & Computational Biology
Aamir Saeed, Rehan Ali Shah, Muhammad Sohail Khan, Unai Fernandez-Gamiz, Mutasem Z. Bani-Fwaz, Samad Noeiaghdam, Ahmed M. Galal
Summary: The theoretical analysis of unsteady, squeezing nanofluid flow is studied in this research. By using the Navier Stokes Equation, Energy Equation, and Concentration Equation, the flow of nanofluid between two parallel plates in a rotating system is analyzed with variable physical properties such as viscosity and thermal conductivity. The study considers the effects of Thermophoresis and Brownian motion in the nanofluid model. The results show the relationship between parameters such as skin friction, Injection parameter, Squeezing number, Prandtle number, Schmidt number, and Rotation parameter, as well as their effects on the Velocity field, Temperature variation, and Concentration profile. The Parametric Continuation Method (PCM) is employed to obtain the results, which are further validated through BVP4c. The obtained results correspond to each other, indicating the accuracy of the analysis.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2022)
Article
Mathematical & Computational Biology
Aamir Saeed, Rehan Ali Shah, Muhammad Sohail Khan, Unai Fernandez-Gamiz, Mutasem Z. Bani-Fwaz, Samad Noeiaghdam, Ahmed M. Galal
Summary: Theoretical analysis of physical characteristics of unsteady, squeezing nanofluid flow is conducted using Navier Stokes Equation, Energy Equation and Concentration equation with transformed equations by similarity transformation. The analysis shows that skin friction parameter increases with Squeezing Reynolds number, Injection parameter and Prandtle number, but decreases with Schmidt number and Rotation parameter. Additionally, Nusselt number shows a direct relationship with injection parameter and Reynolds number, while showing an opposite trend with other parameters.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Jun Mu, Shenwei Yu, Shimeng Hao
Summary: A quantitative assessment model is established for the thermal conductivity of earth materials, based on their microscopic agglomeration morphology and pore structure properties. The model improves the precision of characterizing the thermal conductivity and investigates the impact of clay, sand, and gravel content on the thermal conductivity of earth materials. The findings offer a theoretical foundation for optimizing the thermal performance and fabrication process of earth materials.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Chemistry, Physical
Ramanujam Lenin, Pattayil Alias Joy, Chandan Bera
Summary: Thermal properties of nanofluids, including dispersion, stability, and heat transfer, are heavily influenced by the interfacial layer, specifically its thickness and thermal conductivity. However, the challenges in determining these factors have limited research progress in the field of nanofluids. This review aims to provide insights on optimizing nanofluid thermal properties for commercial applications.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
