Article
Automation & Control Systems
Fadl Dahan, Abdulelah Alwabel
Summary: This paper introduces a hybrid algorithm to solve the service composition problem in cloud computing, which overcomes the limitations of existing algorithms by combining Artificial Bee Colony (ABC) and Cuckoo Search (CS) algorithms, and demonstrates better performance on multiple datasets.
INTELLIGENT AUTOMATION AND SOFT COMPUTING
(2023)
Article
Computer Science, Artificial Intelligence
Tingyu Ye, Hui Wang, Wengjun Wang, Tao Zeng, Luqi Zhang, Zhikai Huang
Summary: This paper proposes a modified artificial bee colony algorithm, ASDABC, which performs well in solving complex optimization problems.
NEURAL COMPUTING & APPLICATIONS
(2022)
Review
Automation & Control Systems
Ebubekir Kaya, Beyza Gorkemli, Bahriye Akay, Dervis Karaboga
Summary: The ABC algorithm is a popular optimization algorithm that has been successfully applied to solve real-world problems. This study examines combinatorial optimization approaches based on the ABC algorithm, provides summaries of related studies, and introduces the ABC algorithm-based approaches used. The study also evaluates mechanisms to improve the local search capability of the ABC algorithm and analyzes neighborhood operators, selection schemes, initial populations determination approaches, hybrid approaches, and test instances used in evaluating the performances of ABC algorithms.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2022)
Article
Computer Science, Artificial Intelligence
Songyi Xiao, Hui Wang, Wenjun Wang, Zhikai Huang, Xinyu Zhou, Minyang Xu
Summary: A novel ABC variant called ABCNG is proposed in this paper to improve the performance and competitiveness of the traditional ABC algorithm. Experimental results show that ABCNG is more competitive than six other ABC variants.
APPLIED SOFT COMPUTING
(2021)
Article
Engineering, Multidisciplinary
Omur Sahin, Bahriye Akay, Dervis Karaboga
Summary: Testing object-oriented software is challenging due to various properties like classes, inheritance, states, behavior, association, and polymorphism. Search-based testing methods like ABC algorithm can automatically generate test cases to optimize coverage goals. Use of archive in ABC algorithm improves convergence and coverage for software testing.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2021)
Article
Multidisciplinary Sciences
Zhiqing Chen, Ping Xuan, Ali Asghar Heidari, Lei Liu, Chengwen Wu, Huiling Chen, Jose Escorcia-Gutierrez, Romany F. Mansour
Summary: This article presents a new wrapper gene selection algorithm called artificial bee bare-bone hunger games search (ABHGS), which combines hunger games search (HGS) with an artificial bee strategy and a Gaussian bare-bone structure to address the challenges of identifying representative genes and reducing data dimensionality.
Article
Computer Science, Artificial Intelligence
Omur Sahin, Bahriye Akay
Summary: Microservices decompose applications into maintainable services and reduce complexity. The study proposes a Discrete Dynamic Artificial Bee Colony with Hyper-Scout algorithm to address issues in RESTful testing generation. Experimental results show the algorithm achieved high performance in multiple problems.
APPLIED SOFT COMPUTING
(2021)
Article
Computer Science, Artificial Intelligence
Tingyu Ye, Wenjun Wang, Hui Wang, Zhihua Cui, Yun Wang, Jia Zhao, Min Hu
Summary: This article introduces a new artificial bee colony algorithm (RNSABC) based on random neighborhood structure to enhance the performance of the original ABC algorithm. The authors construct a random neighborhood structure and design an improved search strategy for optimization. Additionally, a depth-first search method is used to enhance the role of the onlooker bee phase. Experimental results demonstrate that RNSABC achieves competitive performance compared to nine other recent ABC variants.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Computer Science, Artificial Intelligence
Tao Zeng, Wenjun Wang, Hui Wang, Zhihua Cui, Feng Wang, Yun Wang, Jia Zhao
Summary: The paper introduces an efficient ABC algorithm named ASRGABC based on adaptive search strategy and random grouping mechanism. It adapts search strategy, introduces random grouping mechanism, and utilizes opposition-based learning to enhance the scout bee phase, outperforming thirteen other ABC variants in benchmark problem tests.
EXPERT SYSTEMS WITH APPLICATIONS
(2022)
Article
Computer Science, Information Systems
Kai Li, Hui Wang, Wenjun Wang, Feng Wang, Zhihua Cui
Summary: This paper proposes an artificial bee colony algorithm based on a modified nearest neighbor sequence to enhance optimization capability. Experimental results show that the algorithm performs competitively on various benchmark problems and complex problems.
JOURNAL OF KING SAUD UNIVERSITY-COMPUTER AND INFORMATION SCIENCES
(2022)
Article
Mathematics, Applied
Yulin Deng, Hongfeng Xu, Jie Wu
Summary: This study investigates risk reduction methods of asset securitization using various approaches, including portfolio methods and blockchain technology, to enhance investment security. It proposes an improved ABC algorithm for portfolio optimization and demonstrates its capability to simultaneously optimize multiple features in the investment portfolio, thereby reducing investor errors and improving the balance between investment returns and risks.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2021)
Article
Optics
Vehbi Yolcu, Murat Yuecel, Dogan Aydin
Summary: This study focuses on optimizing the wavelength and power values of pump lasers in distributed fiber Raman amplifiers (FRA) to achieve a broadband and flat gain region. By using an adaptive artificial bee colony algorithm and MATLAB BVP solver, the study successfully solved the FRA boundary value problem. The results demonstrated a maximum gain ripple of 0.5 dB for 100 optical signals.
OPTICAL ENGINEERING
(2023)
Article
Engineering, Marine
Chaicheng Jiang, Shaolong Yang, Pang Nie, Xianbo Xiang
Summary: This paper proposes a multi-objective optimization approach for the discrete problem of river boat profile structure optimization. A component library is established to convert the discrete structural model into a continuous optimization model. An adaptive Artificial Bee Colony Algorithm (I-ABC) is then proposed to balance the global and local search capability. Additionally, a Dominating Artificial Bee Colony Algorithm (D-ABC) is introduced for multi-objective optimization by considering Pareto domination and individual crowding.
Article
Computer Science, Interdisciplinary Applications
Yue Xu, Xiuli Wang
Summary: This paper proposes a two-stage approach to solve the staff scheduling problem in call centers. The approach utilizes the artificial bee colony algorithm and integer programming to generate and optimize shift schedules. Experimental results demonstrate the effectiveness and efficiency of the proposed method in providing good solutions for large-scale problems. Additionally, guidance is provided on balancing employees' working preferences and labor costs with staff satisfaction.
COMPUTERS & INDUSTRIAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Derya Deliktas, Dogan Aydin
Summary: This paper proposes an artificial bee colony based-hyper heuristic algorithm to solve multi-objective simple assembly line balancing problems. By optimizing the efficiency and idle percentage of the assembly line while minimizing the number of workstations, the algorithm demonstrates superior performance in benchmark tests.
ENGINEERING COMPUTATIONS
(2023)
Article
Environmental Sciences
Sacithra Anandaraj, Manivannan Ayyasamy, Fausto Pedro Garcia Marquez, Muthu Manokar Athikesavan
Summary: The efficiency of photovoltaic cells decreases with increasing solar irradiation. This study introduces a novel design of a thermal absorber, made of a flat spiral tube, to decrease the cell temperature and improve the efficiency of the photovoltaic thermal system (PVTS). Water and titanium oxide nanofluid are used as the working fluid in the PVTS, and the results show that cooling using these fluids significantly reduces the cell temperature and increases the electrical efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Rahul Waghmare, Ravindra Jilte, Sandeep Joshi, Pranjali Tete
Summary: This article discusses the concept of Agrophotovoltaics (APV), explores various APV systems, and highlights future developments. The study summarizes the key features of APV systems, crop selection criteria, feasible crops for Indian climatic conditions, and future research directions. Additionally, it presents a theoretical study on the thermal management of solar PV modules using crops' natural transpiration cooling. The study shows an increase in daily energy generation compared to conventional solar PV systems. Experimental results also demonstrate the performance improvement of APV systems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Emmanuel Agbo Tei, Rasool Mohideen Shahul Hameed, Muthu Manokar Athikesavan, Aakash Srinivasan
Summary: The lack of drinkable, safe water is a global issue faced by governments worldwide. In an study conducted in India, researchers explored two solar stills (conventional solar still and solar still with high thermal conductivity material) to produce fresh water. The addition of high thermal conductivity material (silicon carbide) increased the freshwater production during low solar intensity and evening periods. The solar still with high thermal conductivity material showed a 93.7% higher daily yield production and a 94.3% higher thermal efficiency compared to the conventional solar still.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Asif Afzal, Abdulrajak Buradi, Ravindra Jilte, Saboor Shaik, Abdul Razak Kaladgi, Muslum Arici, Chew Tin Lee, Sandro Nizetic
Summary: This paper presents a thorough review of optimization methods and tools for solar energy systems, focusing on intelligent optimization techniques. The use of new generation artificial intelligence algorithms has been found to be most effective in reducing operating costs, improving efficiency, and minimizing emissions. The paper also highlights the challenges and future approaches for establishing a reliable and efficient solar power system.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Engineering, Multidisciplinary
M. Venkatesan, Abd Elnaby Kabeel, Sriharikota Chandra Sekhar, Ravishankar Sathyamurthy, Muthu Manokar Athikesavan
Summary: Seaweeds, primitive plants and macroalgae, typically grow in shallow water areas such as backwaters, estuaries, and seas. They attach to coral reefs, rocks, and other substrata. Researchers collected seaweeds from the Kanyakumari region and processed them to extract methanol using the Saccharification method. The highest yield of methanol (51.2%) was obtained with a substrate concentration of 15% and a time duration of approximately 48 hours. The study focused on producing methanol from a high concentration and choice of seaweed (Sargassum wightii).
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ravindra Jilte, Asif Afzal, Umit Agbulut, Ahmad Aziz Alahmadi, Mamdooh Alwetaishi, Ali Nasser Alzaed
Summary: For dispersed or remotely located families, the collection of raw milk is challenging due to less frequent collection and transportation issues. This study presents a novel milk chiller design based on phase change material, which can maintain the chilling conditions even without power. It proposes a portable mobile milk chilling system that can be moved between solar PV plants and the electric grid. The test results show that the milk chiller latent storage system can effectively cool the milk to the desired storage temperature within a short time.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Jeet Prakash Sharma, Ravindra Jilte, Ravinder Kumar
Summary: This paper proposes a hybrid design of cylindrical and hemispherical cavity and investigates its effects on temperature and flux distribution and solar-to-fuel efficiency. Computational fluid dynamics analysis is conducted to study heat and mass transfer as well as design considerations. The oxygen evolution rate and solar-to-fuel efficiency are modeled and optimized based on various geometrical factors.
JOURNAL OF THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Abdelkrim Khelifa, Mohammed El Hadi Attia, Zied Driss, A. Muthu Manokar
Summary: This study presents a numerical investigation of a solar collector PV/T system using dual exchangers for cooling with water and air. The impacts of absorber plate design, water mass flow rate, and solar irradiation on flow structure and thermal efficiency are examined. Results show that increasing the number of fins and solar radiation can enhance the system's thermal efficiency, while increasing water mass flow rate slightly decreases it. Configuration 3 with 40 fins and a water mass flow rate of 0.01 kg/s is considered the optimal design for efficient cooling and high yields of the hybrid collector.
Article
Thermodynamics
Fayaz Hussain, Saboor Shaik, Sher Afghan Khan, Van Van Huynh, R. D. Jilte, Vikram Sundara, Mohammed Asif, Emanoil Linul
Summary: Producing potable water from salt water in arid places using a stepped solar still desalination process is crucial. This study investigates the temperature distribution and phase transformation of lauric acid PCM in an inclined stepped solar still desalination system. The results show that the temperature and mass fraction of lauric acid PCM strongly depend on various factors, such as the saline water level, number of steps, inclination angle, and location of the solar still step.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Review
Environmental Sciences
Sriram Surya Kirampadi Sankar, Anish Murugan, Abdur Rahman, Mohamed Illyas, Rajendran Duraisamy Ramalingam, Fausto Pedro Garcia Marquez, Muthu Manokar Athikesavan
Summary: Solar energy has emerged as a promising renewable energy source to replace current energy market. Flat plate solar collectors (FPSC) are easy to produce and cost-effective, leading to extensive research to improve its efficiency and reliability. This article analyzes recent improvements in FPSC technology, with focus on achieved efficiencies and temperatures, aiming to provide valuable insights into the advancements in FPSC and their potential for solar energy utilization.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Mridul Sharma, Ravindra Jilte
Summary: The effect of symmetrical convex-concave corrugations on a parabolic trough solar collector's receiver pipe is investigated numerically. Twelve different geometrically configured receiver pipes with corrugations are examined, with varying corrugation pitch (4mm to 10mm) and height (1.5mm to 2.5mm). The study determines heat transfer enhancement, flow behavior, and overall thermal performance of fluid under non-uniform heat flux conditions. The presence of corrugations leads to axial whirling and vortices, enhancing heat transfer, with the receiver pipe having 8mm pitch and 2mm height giving the best results. The maximum enhancement in average Nusselt number over a smooth pipe is observed to be 28.51%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
M. Abdur Rahman, Serajul Haque, Muthu Manokar Athikesavan, Mohamed Bak Kamaludeen
Summary: The increasing concern for environmental damage and the demand for environmentally friendly materials has led to a rise in interest for using renewable and biodegradable plant-based materials for polymer composites, often referred to as green composites. These composites have a wide range of industrial applications and are seen as potential substitutes for petroleum-based materials. This paper focuses on the processing of green composites using naturally available resources, sustainable materials, new scientific advancements, nanotechnology, environmental consequences, and evaluates the environmental impacts of different composite materials and their production. The manufacturing aspects and concerns related to the production of green composites are also discussed, along with highlighting the merits of these materials as valuable substitutes for traditional composites.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Medicine, General & Internal
Kate E. Hughes, Md Tariqul Islam, Benjamin Co, Merryl Lopido, Neil L. Mcninch, David Biffar, Vignesh Subbian, Young-Jun Son, Jarrod M. Mosier
Summary: This study compares the laryngoscopy force required for endotracheal intubation using three commercially available simulation manikins in both normal and difficult airway scenarios. The results show significant variability in laryngoscopy force among the manikins, as well as differences in the force required for intubation between normal and difficult airway scenarios. Experienced clinicians rated the Gaumard manikin as the most realistic in terms of force applied during intubation.
CUREUS JOURNAL OF MEDICAL SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Ratchagaraja Dhairiyasamy, Bahaa Saleh, Mohan Govindasamy, Ayman A. Aly, Asif Afzal, Yasser Abdelrhman
Summary: In this study, the effectiveness of using silver nanoparticles of different particle sizes to improve the heat transfer properties of a car radiator was investigated. It was found that smaller nanoparticles exhibited higher thermophysical properties. Correlations were developed to estimate the heat transfer properties and friction factor characteristics based on experimental Nusselt numbers and friction factor values.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)
Article
Engineering, Mechanical
Mohammed Kareemullah, Asif Afzal, K. Fazlur Rehman, K. C. Vishwanath, Hurmathulla Khan, Manzoore Elahi. M. Soudagar, Abdul Razak Kaladgi
Summary: The development of bio-lubricants is crucial in addressing environmental pollution. This article focuses on the preparation and evaluation of a bio-lubricant based on Neem oil. The study shows that Neem oil has the lowest viscosity, while blended lubricants have reduced viscosity compared to Neem oil.
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2023)
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)
