Review
Multidisciplinary Sciences
Hossam A. Nabwey, Farhad Rahbar, Taher Armaghani, Ahmed. M. Rashad, Ali J. Chamkha
Summary: This article provides a reflection on symmetry in nanofluid heat transfer modeling by describing various non-Newtonian models and reviewing articles that have applied symmetrical flow modeling. It also investigates the history and applications of nanofluids as non-Newtonian fluids. The study answers questions regarding the use of non-Newtonian models, common non-Newtonian base fluids, and the most used numerical methods for solving non-Newtonian equations.
Article
Thermodynamics
Aissa Abderrahmane, Wasim Jamshed, Azher M. Abed, Ghassan Fadhil Smaisim, Kamel Guedri, S. Suriya Uma Devi, Omid Ali Akbari, Obai Younis, Shaghayegh Baghaei
Summary: This investigation analyzes the heat transport phenomena of non-Newtonian nanofluid in an annulus enclosure and finds that the composition of the nanofluid can enhance heat transfer. By manipulating parameters such as Rayleigh and Darcy numbers, power-law index, and magnetic forces, the heat transfer performance can be improved.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Naifa S. Alatawi, Abeer M. Almutairi, S. A. Khalil, Asma Obaidallah Alatawi, Wejdan Al-Anazi, Mourad Magherbi
Summary: This paper investigates heat transfer and entropy generation caused by mixed convection in an inclined channel with nanofluid jets for cooling photovoltaic panels. The numerical solution of the governing flow equations is obtained using COMSOL software. The effects of inclination angle, Reynolds number, and nanoparticle fraction on heat transfer and entropy generation are examined. The results show that the angle of inclination has a weak effect on heat transfer and thermal irreversibility, while the nanofluid concentration and Reynolds number have a significant impact. The increase in nanoparticle concentration leads to a 15% increase in Nusselt number and thermal irreversibility.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Amin Shahsavar, Seyed Saman Alimohammadi, Ighball Baniasad Askari, Hafiz Muhammad Ali
Summary: The numerical investigation of force convection flow of non-Newtonian water/CMC-CuO NF in three wavy channels and a straight channel was conducted. The study found that the influence of Re and nanoparticle concentration phi on pressure drop, Nu, and global entropy generation rates differed. Increasing Re and decreasing phi resulted in higher Nu values for all four channels, with the sinusoidal channel having the highest Nu. The trapezoidal channel had the highest pressure drop and total global entropy generation rate.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Mechanical
Sangram Kumar Samal, Manoj Kumar Moharana
Summary: This study focuses on the numerical analysis of entropy generation in recharging and simple microchannels, revealing that increasing the number of small channels, channel aspect ratio, and substrate material thermal conductivity can reduce thermal entropy generation, while increasing substrate thickness, channel wall width, and applied heat flux can increase thermal entropy generation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mathematics, Applied
Amin Shahsavar, Shahla Noori, Davood Toghraie, Pouya Barnoon
Summary: This study investigates the hydrothermal and entropy generation characteristics in a naturally cooled eccentric horizontal annulus filled with non-Newtonian water-magnetite/CNT nanofluid. The results show that the average Nusselt number, global thermal EG, and global frictional EG increase with the increase of Rayleigh number and nanoadditive concentration. Additionally, it is found that negative eccentricity has both desirable and undesirable effects on the first and second laws of thermodynamics.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2021)
Article
Thermodynamics
S. Shaheen, K. Maqbool, R. Ellahi, Sadiq M. Sait
Summary: This study investigates the impact of heat transfer on the flow of tangent hyperbolic nanofluid in a ciliated tube, exploring its benefits for embryology research and medical experts. It highlights the use of nanoparticles in removing cysts from the fallopian tube and the reduction of entropy generation due to ciliary movement. The research discusses the optimization of energy through heat transfer and the influence of various parameters on velocity, temperature, and entropy generation in the system.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Ali E. Anqi
Summary: This paper investigates the significance of a serpentine microchannel on the surface of batteries and confirms that the use of nanofluids can increase heat transfer between the microchannel and battery by up to 20%. The study also finds that the Reynolds number is the most effective parameter in improving heat transfer, with an increase from 6.34 to 12.75 when the Reynolds number varies from 25 to 150. Additionally, the use of hydrophobic walls in microchannels leads to a 14.4% enhancement in heat transfer compared to conventional walls.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Multidisciplinary
G. Sandhya, K. Malleswari, G. Sarojamma, K. Sreelakshmi, P. V. Satya Narayana
Summary: The current research focuses on the exploration of dissipation and chemical reactions in MHD radiative Casson nanoliquid thin film flow generated by sheet stretching. The study remodeled nonlinear partial differential equations into a system of ordinary differential equations using similarity variables and obtained computational results using shooting technique. The outcomes indicate that the thickness of the thin film decreases with increasing unsteady, magnetic, and Casson parameters, with a reduction in wall friction coefficient for higher non-Newtonian parameter estimates.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2021)
Article
Mechanics
Sapna Jain, Surabhi Nishad, Rama Bhargava
Summary: This paper investigates the effect of double diffusion natural convection fluid flow inside a double wavy enclosure using the mesh-free method. The results show that the mass and heat transfer rates increase with an increase in the Rayleigh number and buoyancy ratio, while they decrease with an increase in the thermophoresis parameter, Lewis number, Brownian motion, and power-law index. Such enclosures have applications in heat exchanger devices, double-wall thermal insulation systems, and microelectronic devices.
Article
Engineering, Multidisciplinary
Amin Shahsavar, Sajad Entezari, Ighball Baniasad Askari, Mehdi Jamei, Masoud Karbasi, Mohammad Shahmohammadi
Summary: A 3-D numerical investigation was conducted to assess the hydrothermal behavior and entropy generation features of a non-Newtonian water-CMC/CuO nanofluid flow in a twisted tube with a square cross-section. The effect of variable twist pitch on the overall performance of the nanofluid was evaluated, and a gene expression programming approach was used to simulate the performance under different twist pitches.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Thermodynamics
H. B. Marulasiddeshi, Praveen Kumar Kanti, S. B. Prakash, S. N. Sridhara
Summary: This research investigates the thermohydraulic behavior and thermodynamic irreversibility rate of water-based Al2O3 and Al2O3 + CuO hybrid nanofluid in a circular copper tube under a constant heat flux. The study analyzes the thermophysical characteristics, Nusselt number, entropy generation number, and friction factor of the nanofluids at different concentrations and Reynolds numbers. The findings demonstrate the potential of Al2O3 + CuO hybrid nanofluids as alternative cooling fluids for thermal systems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
N. Pahlevaninejad, M. Rahimi, M. Gorzin
Summary: The study investigates the hydrodynamic and heat transfer behavior of non-Newtonian nanofluid in a wavy microchannel with rectangular obstacles. By adding aluminum oxide nanoparticles of different sizes and volume fractions to pure water, the effects of different rib heights, Reynolds numbers, and friction factors on heat transfer performance were studied. Results showed that increasing the volume fraction of Al2O3 nanoparticles increased the average Nusselt number, and the case with the highest obstacle height exhibited the largest friction factor value.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Kashif Ali, Sohail Ahmad, Kottakkaran Sooppy Nisar, Aftab Ahmed Faridi, Muhammad Ashraf
Summary: Hybrid nanoliquids exhibit improved physical strength, mechanical resistance, thermal conductivity, and chemical stability compared to individual nanoliquids. The study found that hybrid nanofluids have the potential to significantly increase shear stress levels, up to 57% in some cases. Caution must be exercised in using these fluids, particularly in applications where control over shear stress is necessary.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Mathematics, Applied
Sajjad Sarvar-Ardeh, Roohollah Rafee, Saman Rashidi
Summary: When designing microscale heat exchangers, methods such as using nanofluids and convergent walls can help reduce energy dissipation and improve system performance. This study investigates the hydrothermal performance and entropy generation of alumina-silica/water hybrid nanofluid in a double-layer tapered microchannel using three-dimensional simulation. The results show that using a convergent microchannel can decrease surface temperature and temperature gradient, and changing the volumetric fraction of nanoparticles and tapered factor affects the thermal resistance and pumping power of the system.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Chemistry, Physical
Rajalaxmi Sahoo, C. Reshma, D. S. Shankar Rao, C. V. Yelamaggad, S. Krishna Prasad
Summary: This study investigates the influence of the flexible spacer parity of a guest photoactive liquid crystalline dimer on the photonic bandgap features of the cholesteric and twist grain boundary smectic C phases of the host molecule. The results show that the parity of the photoactive dimer affects the width of the photonic bandgap and the blue-shift of the cholesteric phase. Additionally, the parity of the dimer also affects the layer spacing and two-dimensional periodicity of the liquid crystalline phases.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Sara Rozas, Alberto Gutierrez, Mert Atilhan, Alfredo Bol, Santiago Aparicio
Summary: This study presents a multiscale theoretical investigation on the use of bifunctional hydrophobic Deep Eutectic Solvent for carbon capture using tetrapropylammonium chloride, acetic acid, and ethanolamine. The characterization includes nanoscale analysis of CO2 absorption mechanisms and changes in liquid phase properties during gas capture.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Tabouli Eric Da-yang, Alhadji Malloum, Jean Jules Fifen, Mama Nsangou, Jeanet Conradie
Summary: In this study, the potential energy of different glycine tautomers and their interaction with Cu2+ cations was investigated. The results showed that the solvation medium and the presence of Cu2+ cations influenced the stability of glycine tautomers.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Xiaoliang Gou, Nan Ye, Qingqing Han, Junjie Cui, Long Yi Jin
Summary: In this study, amphiphilic rod-coil molecules with rigid DSA parts and flexible oligoether chains were designed and their assembly capacities were investigated. The morphology of the molecular aggregates was influenced by the pH of the solution and UV light, and the aggregates showed adsorption capacity for nitroaromatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Shuang Liu, Liyan Shan, Cong Qi, Wenhui Zhang, Guannan Li, Bei Wang, Wei Wei
Summary: Optimizing the design of styrene-butadiene-styrene copolymer (SBS) is crucial for producing cost-effective SBS modifiers and improving road quality. This study examined the influence of SBS content and molecular structure on viscosity and compatibility. The results showed that the viscosity contribution of SBS is determined by its molecular structure and phase morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Artem A. Petrov, Ekaterina A. Titova, Aydar A. Akhmadiyarov, Ilnaz T. Rakipov, Boris N. Solomonov
Summary: This work focuses on the thermochemistry of solvation of azeotropes. The enthalpies of dissolution of azeotropes in different mediums were determined, and the impact of the structure of the azeotropes on their properties in solution was discussed. A correlation between enthalpies of solvation and molar refraction was used to determine the vaporization enthalpies of azeotropes for the first time. The results were found to be consistent with literature data, obtained using direct and calculated methods. These findings contribute to the analysis of the structure-property relationships of azeotropes.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
L. V. Kamaeva, E. N. Tsiok, N. M. Chtchelkatchev
Summary: Understanding the correlations between liquids and solids allows us to predict the thermodynamic parameter range favorable for the formation of intriguing solid phases by studying liquids. In this study, we experimentally and theoretically investigated an Al-Cu-Co system within different composition ranges, and identified high-temperature solid phases. Our findings demonstrated the correlation between the boundaries of different solid phases and undercooling and viscosity in the concentration area.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
R. Aneesh Kumar, S. Jamelah Al-Otaibi, Y. Sheena Mary, Y. Shyma Mary, Nivedita Acharjee, Renjith Thomas, Renjith Raveendran Pillai, T. L. Leena
Summary: In this study, the interactions between doped and pristine coronenes and adenine nucleobases were investigated using Density Functional Theory. The optimal configurations, adsorption energies, charge transfer, and electrical properties of each complex were calculated. It was found that doped coronene had stronger adsorption strength and charge transfer compared to pristine coronene. The stability of the complexes was attributed to non-covalent interactions in the interactive region. The change in electrical conductivity of coronenes after adsorption suggested their sensitivity towards DNA bases. The predicted energy gap and prolonged recovery time for adenine-coronene configurations indicated the potential application of pristine/doped coronene in DNA detection.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Gang Zhou, Yongwei Liu, Biao Sun, Zengxin Liu, Cuicui Xu, Rulin Liu, Qi Zhang, Yongmei Wang
Summary: The CFD-DEM method was used to simulate the dust deposition pattern in the bronchus of anchor digging drivers, revealing the highest dust concentration in the vortex region of the working face. The study also found a positive correlation between dust particle diameter and bronchial deposition rate, and a negative correlation with alveolar deposition rate.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Yan Zhang, Yafei Luo, Lingkai Tang, Mingyan E, Jianping Hu
Summary: This study investigates the effects of different transition metal decorations on B12N12 nanocages on the adsorption properties of nitrosourea drugs using computational methods. The results reveal the presence of weak non-covalent interactions between metals and nanocages, and the interaction between drugs and nanocages plays a significant role in drug adsorption. Compared to free drugs, the adsorption of drugs on nanocages can facilitate electron transfer, reduce energy gaps and chemical hardness, indicating activity at the target site.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
C. I. Alcolado, J. Poblete, L. Garcia-Rio, E. Jimenez, F. J. Poblete
Summary: In this study, the selective oxidation of aromatic aldehydes was investigated using Ru(VI) as a catalyst and hexacyanoferrate (III) as a cooxidant in an alkaline medium. The reaction mechanism involves complex reaction orders for the oxidant and the aromatic aldehyde, while the reaction order for Ru(VI) is one. The proposed mechanism includes two catalytic cycles and the formation and decomposition of complexes. Quantitative structure-activity relationship analysis showed that deactivating groups in the para-position enhance the process.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Hongyan Huang, Chunquan Li, Siyuan Huang, Yuling Shang
Summary: This study examines the sensitivity of the thermal conductivity of water-based alumina nanofluids to changes in concentration, sphericity, and temperature. The results show that volume fraction and temperature have a significant impact on the thermal conductivity, while sphericity also needs to be considered. A support vector machine regression model was created to analyze the sensitivity of the thermal conductivity to different parameters. The findings indicate that temperature, sphericity, and volume fraction are the most sensitive variables.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Correction
Chemistry, Physical
V. M. Pergamenshchik, T. Bryk, A. Trokhymchuk
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Valentyn Rudenko, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, Yuriy Garbovskiy
Summary: This paper reports on the synthesis, structural characterization, spectral and nonlinear-optical properties of glass nanocomposites made of glass forming ionic liquid crystals and nanoparticles. The study reveals that by exciting the nanocomposites within their absorption band, a control over effective optical nonlinearities can be achieved, allowing the modification of the magnitude and sign of the effective nonlinear absorption coefficient. The proposed strategy using metal-alkanoates based glass-forming ionic liquid crystals and nanoparticles shows great potential for the development of nanophotonics and plasmonics technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2024)