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Article
Thermodynamics
Dan Wang et al.
Summary: In this study, a battery pack cooling system with laminar nanofluid flow and phase change materials was simulated using finite element method. The effects of vertical and horizontal distance between battery cells and nanofluid input size on temperature, heat transfer coefficient, and phase change were investigated. The results were optimized using artificial intelligence technique. The findings showed that the maximum pressure drop occurred at the highest nanofluid input, highest horizontal distance, and lowest vertical distance between battery cells (583% difference). The lowest maximum temperature of batteries occurred at the lowest horizontal and vertical distances and smallest nanofluid input dimensions (7.15 degrees difference). The highest heat transfer coefficient between nanofluid and batteries was observed at the highest horizontal distance, lowest vertical distance, and highest nanofluid input dimensions.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Peng Yin et al.
Summary: In this paper, the simulation and study of turbulent flow inside a parabolic solar collector tube equipped with two different pitch ratios of spring insert samples are investigated. The performance of parameters such as volume fraction, Nusselt number, pressure drop, solar collector efficiency, and field synergy principle is analyzed. The results show that decreasing the pitch ratio improves the Nusselt number and solar collector efficiency. The use of spring inserts significantly increases the heat transfer rate and solar collector efficiency.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yinling Wang et al.
Summary: This study investigates the effect of fin geometry on the performance of a heat exchanger using paraffin as the phase change material. The results show that the design of the fins can significantly reduce the melting time.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Jincheng Zhou et al.
Summary: In this article, a numerical study using the control volume method was conducted to investigate the mixed convection of nanofluid in a two-dimensional rectangular cavity. The effect of varying the height of triangle-shaped obstacles on the velocity and temperature graph, velocity and streamline contours, and Nusselt number value was examined. The best parameters for the strongest flow and heat transfer were determined using artificial intelligence. The results showed that the middle obstacle with the highest height had the highest heat transfer. Increasing the length of the right obstacle reduced the heat transfer, with the lowest height of the right obstacle resulting in the highest heat transfer. Height increase in the left obstacle maximized the heat transfer, while its average value minimized the heat transfer. Increasing the height of the right fin reduced the average Nusselt number at different heights of the other two fins.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Multidisciplinary
Mohammadreza Niknejadi et al.
Summary: This research investigates the influence of vortex generators (VGs) with different geometric shapes and Cu-TiO2/H2O nanofluid (NF) on the thermal-hydraulic (TH) performance, energy efficiency, and exergy of a solar collector (SC). The study focuses on the turbulent flow regime (TFR) and uses the QUICK algorithm for equation discretization. Results show that convective heat transfer (CHT), average Nusselt number (Nuavg), and pressure drop (PD) all increase with the inlet velocity of Cu-TiO2/H2O NF flow. Additionally, the addition of VGs and changing their placement states improves the performance evaluation criterion (PEC) of the SC.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Multidisciplinary
Jincheng Zhou et al.
Summary: Investigating the entropy production and inertial number is important for improving the efficiency of heat transfer devices. This study focuses on the entropy production of nanofluid flow in a two-dimensional cavity influenced by a horizontal magnetic field. The Bejan number of the flow under different parameter states is also investigated. The results show that the lowest Bejan number does not necessarily occur at the lowest height of the triangular obstacles, and higher heights of the obstacles lead to higher entropy production.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Materials Science, Multidisciplinary
Aissa Abderrahmane et al.
Summary: This paper presents a numerical simulation of natural convection and fluid flow in a three-dimensional wavy cubical enclosure with a magnetic field along the z-axis. The focus is on discussing entropy generation inside the wavy porous cavity using Brinkman's extended non-Darcy flow model. The results indicate that streamlines and isotherms increase with higher Darcy and Rayleigh numbers, and entropy generation is sensitive to various parameters. Moreover, the variation of the Nusselt number is influenced by the Rayleigh number and Darcy number.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Engineering, Chemical
Shouliang Dong et al.
Summary: In this study, pool boiling heat transfer of Fe3O4/ammonia nanofluid in a copper nanochannel was investigated using molecular dynamics (MD) simulation. The results showed that the density, velocity, and temperature increased with the application of external force on the nanostructure, which also led to an increase in heat flux and thermal conductivity. Additionally, the frequency of the external magnetic field affected the behavior of the nanofluid, with an increase in frequency resulting in higher velocity, temperature, and thermal resistance.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Multidisciplinary Sciences
Sida Li et al.
Summary: This study examines the influence of a non-uniform magnetic field on the thermal efficiency of Fe3O4 nanofluid streaming inside the U-turn pipe of solar heat exchangers. Computational fluid dynamic is employed to visualize the nanofluid flow and investigate the impact of magnetic intensity and Reynolds number on thermal efficiency. The usage of magnetic field produces vortex in the base fluid and significantly improves heat transfer efficiency, particularly with Mn=25 K.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Suwan Zhu et al.
Summary: Inspired by the structures on rice leaves and the slippery surfaces of the pitcher plant, anisotropic slippery hollow tracks (ASHTs) are fabricated to create a unique inclination-enabled bubble diode that allows reversible one-way bubble penetration. This technology demonstrates a wide range of microfluid maneuvering capabilities and can be applied in various fields, such as smart buildings, for heavy oil selective penetration, underwater CO2 gas collection, and dry/wet environment management.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Multidisciplinary
Dan Wang et al.
Summary: The research aims to improve the thermal performance of heat exchangers and simulate the operation of Al2O3-CuO-water nanofluid in a 3D shell-and-tube heat exchanger using computational fluid mechanics techniques. The results show that the nanofluid, turbulator, and high Reynolds number have a significant impact on increasing the thermal performance. The application of nanofluids can reduce environmental damage, energy consumption, and emissions.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Multidisciplinary
Tao Hai et al.
Summary: In this article, the convection of natural alumina/water nanofluid in a rhombus-shaped enclosure was simulated, and the effects of blade and fin parameters on the average Nusselt number, entropy production, and Bejan number were studied. The results showed significant variations of these parameters within certain ranges.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Review
Chemistry, Inorganic & Nuclear
Zhichao Shao et al.
Summary: Triboelectric nanogenerator (TENG) is a new generation technology with easy manufacturing and high energy conversion efficiency, which has attracted extensive attention. However, the low current output performance of main organic polymers in triboelectric materials hinders the development of TENG for complex applications. Porous crystalline materials, such as MOFs and COFs, have been studied to improve TENG performance due to their adjustable structure properties. This review introduces the output enhancement mechanism, triboelectric properties, and applications of TENG based on porous crystalline materials, and discusses the challenges and prospects in developing high-performance and multifunctional TENG.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Thermodynamics
Tao Hai et al.
Summary: The objective of this study is to model the emission characteristics of hydrogen-enriched natural gas engines (HENGEs) using the multilayer perceptron neural network (MLPNN) and multi-output least squares support vector regression (MLS-SVR) methods. The MLS-SVR algorithm outperforms the MLPNN in accurately predicting the emissions of methane, carbon monoxide, and NOx. The MLS-SVR estimates the experimentally-measured emissions with an average relative deviation of 3.55%, 3.30%, and 4.22% for methane, carbon monoxide, and NOx, respectively.
Article
Engineering, Mechanical
Xin Cui et al.
Summary: Magnetic traction nano-lubrication (MTN) method improves the infiltration capacity of magnetic nanolubricants in abrasive grinding, leading to better cooling and lubrication performance, reduced grinding force and temperature, and improved surface integrity. The MTN technology provides a solution for the large contact length grinding (LCLG) of difficult-to-machine aerospace materials.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Cheng Zhong et al.
Summary: A novel virtual synchronous generator (VSG) control method is introduced in this study to provide frequency support in PV generation without the need for additional energy storage. The VSG control utilizes pre-defined power versus voltage curve to reserve part of the active power from PV generation.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Physics, Multidisciplinary
M. Sheikholeslami et al.
Summary: This study investigates the influence of helical tapes on nanofluid turbulent flow in solar flat plate collectors and evaluates the impact of twisted tap (TT) and inlet velocity on the thermal efficiency and Darcy factor of the nanofluid flow. The results suggest that using twisted tapes significantly improves heat transfer efficiency.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Engineering, Mechanical
Armin Sheidani et al.
Summary: In this study, the pure effect of raindrops on dynamic stall of a pitching airfoil has been investigated. It was found that raindrops have negative effects on the lift coefficient of the pitching airfoil, and the presence of raindrops leads to the advancement of some aerodynamic phenomena.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Qishui Zhong et al.
Summary: This paper proposes a temperature field reconstruction method based on acoustic thermometry to monitor the combustion conditions in power plant boilers. The improved algorithm achieves fast and accurate temperature field monitoring. The experimental results show that this method has shorter reconstruction time, better reconstruction accuracy and robustness, making it feasible for engineering applications in power plant boilers.
Article
Engineering, Electrical & Electronic
Zhicheng Wu et al.
Summary: This article investigates the dielectric loss of epoxy resin (EP) in medium-frequency transformers (MFTs) through experiments and simulations. The results show that the addition of anhydride hardeners containing benzene ring or a methyl substituent can reduce the dielectric loss, and the EP cured by methyl nadic anhydride (MeNA) has the lowest dielectric loss. This study provides important insights for the selection of insulating materials in MFTs.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Materials Science, Multidisciplinary
Naser Koosha et al.
Summary: This study investigated the capture efficiency and trajectories of carrier particles in a Y-shaped vessel under the effect of a non-uniform magnetic field. The results showed that increasing blood velocity and particle diameter enhanced the capture efficiency, with the 90 degrees rotated magnet being the most desirable case.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Thermodynamics
Caiyuan Xiao et al.
Summary: This study investigates the forced convection of non-Newtonian nanofluid in Traditional Microchannel (TMC) and Manifold Microchannel (MMC) with porous media through numerical simulations. The results demonstrate that increasing Reynolds number and volume fraction of nanoparticles, while decreasing porosity, enhances the heat transfer performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Yuqin Tian et al.
Summary: This study uses molecular dynamics simulation to investigate the effects of external forces and heat fluxes on the atomic and pool boiling heat transfer of water/Fe nano-fluid. The results demonstrate that increasing external forces and heat fluxes can enhance the maximum temperature, velocity, and density, leading to improved pool boiling heat transfer.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Lu Qiu et al.
Summary: This paper investigates the heat transfer capability of refrigerants inside a nanochannel using molecular dynamics simulation. By changing the heat flux and thermal conductivity, the thermal performance of different samples is examined. The results show that hydrocracked oil exhibits better thermal behavior and the addition of hybrid nanoparticles improves the thermal performance of the oil sample.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Computer Science, Information Systems
Houhong Lu et al.
Summary: The internal defect detection of magnetic tile before mounting is crucial in the manufacturing industry. However, the current manual operation results in inefficiency and diseconomy. In this work, an intelligent system based on acoustic sound is developed to address these issues. A multimodal fusion convolutional neural network (MMFCNN) is designed for accurate internal defect detection, and a novel attention mechanism is proposed to enhance feature extraction. Extensive experiments demonstrate the effectiveness of the proposed MMFCNN for internal defect detection of magnetic tile.
Article
Engineering, Aerospace
Kabir Bakhshaei et al.
Summary: This paper investigates the unsteady aerodynamics of an insect's forward flight using a novel approach. By combining multiple software to interact with each other at each time step, the most accurate way for conducting precise multi-physics simulations has been identified.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Physics, Multidisciplinary
Zouhaier Mehrez et al.
Summary: The study numerically investigated forced convection ferrofluid flow inside a rectangular channel under the influence of a non-uniform magnetic field, revealing significant effects of the magnetic field on flow and heat transfer behaviors. Increase in magnetic field strength leads to higher skin friction coefficient and heat transfer rate, while higher Reynolds number and volume fraction of nanoparticles decrease the skin friction coefficient.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Food Science & Technology
Dler H. Kadir
Summary: Utilizing statistical evaluation of extraction parameters for 20 medicinal plants, optimal conditions for total phenolic content (TPC) extraction were determined, revealing a direct correlation between bioactivity and TPC levels for the plants studied.
FOOD SCIENCE & NUTRITION
(2021)
Article
Thermodynamics
Min Yang et al.
Summary: The study investigates the convective heat transfer characteristics and measurement methods of nanofluid aerosol cooling, establishing a theoretical model for the convective heat transfer coefficient and proposing a new measurement device to validate the theoretical model.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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