Article
Chemistry, Physical
Xiong Lingda, Zhu Guoli, Mi Gaoyang, Wang Chunming, Jiang Ping
Summary: By establishing a phase-field model, the study simulated the columnar-to-equiaxed transition in Al-Cu alloy laser welding, revealing that equiaxed grains grew ahead of columnar dendrites and formed a belt-like structure; the highest number of equiaxed grains was found at the top edge of the molten pool; with prolonged solidification, the number of heterogeneous nuclei increased and the size of equiaxed grains decreased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Kangning Jin, Ziyou Yang, Ping Chen, Guoshun Huang, Xiaoxi Qiao
Summary: A multi-physics model was established to analyze the complex microstructure evolution process during laser cladding of IN718. The results showed that thermal convection is the main heat transfer mode in the molten pool and the decrease of line energy affects the size of the columnar grain zone and the size of equiaxed grains.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Ceramics
Shengchen Li, Defu Liu, Hangbiao Mi, Zixin Deng, Jian Liu, Tao Chen
Summary: In this study, a three-dimensional physical model was created using computational fluid dynamics, discrete element method, and volume-of-fluid method to investigate the physical mechanism of molten pool and solidified tracks during selective laser melting of ceramic powder. The results showed that the laser power significantly impacted the shaping quality of solidified ceramic tracks.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Siyuan Wei, Kwang Boon Lau, Jing Jun Lee, Fengxia Wei, Wei Hock Teh, Baicheng Zhang, Cheng Cheh Tan, Pei Wang, Upadrasta Ramamurty
Summary: This study employed selective laser melting technique to fabricate a step-wise compositionally graded Fe-Al alloy coupon, which showed different grain structure evolution and hardness variations in different Al content regions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Chengwu Yao, Pang Xiaotong, Gong Qunfu, Wang Zhijie, Nie Pulin
Summary: A repair method using laser remelting after laser cladding has been developed to inhibit the epitaxial growth of columnar crystals and relieve the mechanical anisotropy of ultrahigh-strength steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Coatings & Films
He Rui, Meiping Wu, Cui Chen, Dadong Jie, Yuling Gong, Xiaojin Miao
Summary: In this study, FeCrNiMnAl high entropy alloy coatings were fabricated on 17-4PH stainless steel through laser cladding. The influence of different laser energy density on the properties of the coatings was investigated. The results showed that the geometric parameters increased with the rise of laser energy density due to Marangoni convection. Columnar crystals and equiaxed crystals were observed in different zones of the coatings, and a columnar-to-equiaxed transition behavior was observed. Furthermore, the coatings showed improved tribological properties and the optimal performance was found at a laser energy density of 64 J/mm².
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chih-Hung Chen, Amirhossein Molavi Tabrizi, Pierre-Antoine Geslin, Alain Karma
Summary: This study introduces the dendritic needle network (DNN) model to investigate the influence of the Columnar-to-Equiaxed Transition (CET) during metal solidification, proposing both 2D and 3D versions. The results show that the 3D DNN model can accurately predict the position and type of CET at experimental scales without the need for any adjustable parameters.
Article
Materials Science, Multidisciplinary
Honghao Ge, Hao Fang, Caowei Zhang, Liang Wang, Qunli Zhang, Jianhua Yao
Summary: The study demonstrates that a static magnetic field can alter the convective transport of heat and mass during the laser cladding process, resulting in uneven distribution of iron concentration due to the induced Lorentz force inhibiting melt flow.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Xiangbo Liu, Fengye Tang, Wenyong Zhao, Jiasi Cai, Yanhong Wei
Summary: This paper proposes a multi-phase field lattice Boltzmann model to simulate the columnar-to-equiaxed transition (CET) during the solidification of the weld. The model accurately characterizes polycrystalline growth, computes fluid flow, and simulates solid motion, collision, and coalescence. Through simulations under different conditions, the model successfully reproduces the settlement, collision, and coalescence of equiaxed dendrites, and identifies asymmetric growth, dendrite aggregation effect, and solute vortex. The proposed model provides valuable insights into the CET process and its effects on solidification.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Optics
Chen Shen, Chonggui Li, Yajun Guo, Chuanming Liu, Xuanjun Zhang, Xiaosong Feng
Summary: This study presents a modified finite element model to simulate the temperature evolution and clad geometry of TiAlSi coatings, distinguishing thermal properties between powders and alloys for improved simulation precision. The effect of different laser power and scan speeds on cladding layer morphologies is investigated, with results showing track depth and width are directly proportional to power and inversely proportional to speed. The modified model accurately describes single-track laser cladding geometry.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Zixin Deng, Defu Liu, Guan Liu, Jian Liu, Chunye Li, Shudan Li, Tao Chen
Summary: A numerical simulation model is established in this paper to investigate the formation process and physical mechanisms of three-layer structure HA-Ag gradient ceramic coatings under wide-band laser cladding. The formation and evolution process of the molten pool and the solidification front characteristics are studied based on the proposed model. The heat conduction is the dominant mode of heat transfer when laser cladding the barrier layer and the transition layer, while heat convection is the main mode of heat transfer when laser cladding the bioactive layer. The simulation results provide guidance for the process parameters optimization of laser cladding three-layer structure gradient HA-Ag bioactive ceramic coating.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Peng Jin, Yibo Liu, Fuxiang Li, Junzhao Li, Qingjie Sun
Summary: The study successfully eliminated columnar crystal defects and grain boundary segregation in the deposited 2219 aluminium alloy by adding TiC nanoparticles, which led to improved mechanical properties of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Robin P. Mooney, Laszlo Sturz, Gerhard Zimmermann, Nathalie Mangelinck-Noel, Henri Nguyen-Thi, Yuze Li, David J. Browne, Shaun McFadden
Summary: Columnar and equiaxed structures during solidification of metallic alloys affect the properties of castings, welded joints, and additively manufactured components. This study proposes a Concurrent Columnar to Equiaxed Transition (C2ET) model, which accurately simulates the transition zones of columnar and equiaxed structures during solidification.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Engineering, Manufacturing
A. Durga, Greta Lindwall
Summary: During fusion-based metal additive manufacturing, understanding the columnar-to-equiaxed transition in grain structure is important to avoid cracking and anisotropic mechanical properties. The grain morphology is determined by factors such as process conditions, local alloy composition, and nucleating site density. In this study, a model incorporating nucleating site size distribution, rapid solidification, and constitutional undercooling in multicomponent alloys was developed and compared with experimental data for an additively manufactured TiB2-reinforced AlSi10Mg alloy.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Jin Peng, Jigao Liu, Xiaohong Yang, Jianya Ge, Peng Han, Xingxing Wang, Shuai Li, Yongbiao Wang
Summary: In this paper, a heat-flow coupling model of laser welding at preheating temperature was established using FLUENT 19.0 software. The analysis of keyhole wall fluctuation and melt flow behavior in the molten pool under different preheating temperatures revealed the correlation between keyhole wall fluctuation and spatters and bubbles. The study found that the preheating temperature affects the shape of the keyhole wall and the occurrence of welding spatters and keyhole collapse.
Article
Materials Science, Coatings & Films
Wenchao Xi, Boxue Song, Zixuan Wang, Tianbiao Yu, Jun Wang, Yuanxing Dai
Summary: This study investigated the effect of laser re-melting on the morphology and mechanical properties of cladding layer, showing that appropriate laser power can improve the morphology and enhance microhardness and wear resistance. Excessive re-melting laser power can lead to defects and deterioration of mechanical properties in the cladding layer.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Tianqi Zhang, Chuang Guan, Chao Zhang, Wenchao Xi, Tianbiao Yu, Ji Zhao
Summary: The study introduced the UVAP method in polishing BK7 optical glass to improve efficiency and quality. A mathematical model considering ultrasonic vibration effects and a new concept of Preston-coefficient distribution function were proposed. Experiments validated the effectiveness of UVAP in achieving higher material removal rate and better surface quality. The research results can be applied for adjusting polishing parameters and trajectory planning for global polishing of workpiece surfaces.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Industrial
Teng Gao, Changhe Li, Min Yang, Yanbin Zhang, Dongzhou Jia, Wenfeng Ding, Sujan Debnath, Tianbiao Yu, Zafar Said, Jun Wang
Summary: The study compared the mechanical properties of CFRP in flood cooling and dry grinding, and proposed the grinding mechanics with CNT nano-lubricant minimum quantity lubrication. Four sub-models were developed to explain the grinding mechanisms of CFRP under special transversal conditions.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Yu Zhao, Ying Chen, Tianqi Zhang, Tianbiao Yu
Summary: Different overlap modes during laser cladding were studied for Ni204 cladding layers on 45# steel alloys, showing that the double vertical cross overlap mode can enhance microhardness and wear resistance, as well as optimize microstructure uniformity.
MATERIALS AND MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Coatings & Films
Liaoyuan Chen, Tianbiao Yu, Pengfei Xu, Bo Zhang
Summary: In-situ NbC reinforced Fe-based coating was successfully fabricated on carbon steel surface by laser cladding, exhibiting excellent hardness and wear performance due to the reinforced phases and matrix composition.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Sheng Qu, Zixuan Wang, Chao Zhang, Zhelun Ma, Tianqi Zhang, Hao Chen, Zhao Wang, Tianbiao Yu, Ji Zhao
Summary: In this study, the obliquely axial UVAP method is introduced, focusing on the fixed point MRP analysis. Theoretical calculations and modeling were conducted to understand the material removal profile and the effects of polishing parameters, such as ultrasonic amplitude and oblique angle, on the polishing efficiency. Experimental results showed good agreement with the proposed numerical model, indicating the potential of improving material removal capability in UVAP through optimizing process parameters.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xin Chen, Yingdong Liang, Zhengyu Sun, Yu Zhao, Zhelun Ma, Liaoyuan Chen, Tianbiao Yu, Ji Zhao
Summary: The study investigated the grinding performance of TiC-Steel cermet using a customized vitrified bond cBN wheel. Results showed that the main removal modes of TiC-Steel cermet are plastic removal of steel phase and brittle fracture of ceramic phase. Surface roughness parameters increase with grinding depths and decrease with spindle rotation speed, with feed rate having less impact on surface quality. Optimal processing parameters were determined to achieve the best surface quality and lowest grinding force.
CERAMICS INTERNATIONAL
(2021)
Article
Automation & Control Systems
Liaoyuan Chen, Yu Zhao, Chuang Guan, Tianbiao Yu
Summary: Adding CeO2 to ceramics reinforced Fe-based coatings can effectively reduce deposition defects, improve microstructure uniformity, microhardness, and wear resistance. The addition of CeO2 reduces cracks and porosities, enhances the bonding performance between the coating and substrate, promotes melting of ceramic particles, and refines the microstructure. The optimum addition of 2.5 wt.% CeO2 results in the highest and most uniform microhardness and smoother worn surface, despite a higher friction coefficient.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Automation & Control Systems
Yingdong Liang, Chao Zhang, Xin Chen, Tianqi Zhang, Tianbiao Yu, Ji Zhao
Summary: This paper investigates the material removal mechanism of ultrasonic vibration-assisted polishing of optical glass and establishes a related model. By analyzing the effects of different parameters on the material removal rate, the prediction of material removal profile is achieved, providing a theoretical basis for deterministic material removal and polishing of complex curved surfaces.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Xuewei Zhang, Tianbiao Yu, Pengfei Xu, Ji Zhao
Summary: An improved integrated estimation method based on LSTM network and PF algorithm is proposed in this study to predict tool wear values and progress, leading to the modification of cutting force model. Experimental validation shows that the proposed method enhances the availability and sustainability of micro cutting tools, with a 3.4% increase in prediction accuracy compared to not considering the influence of tool wear.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Wenchao Xi, Boxue Song, Jinlong Dong, Tianqi Zhang, Tianbiao Yu, Jun Wang
Summary: Laser cladding is used for repairing damaged parts of machine tools due to its advantages, but sometimes the mechanical properties of the coating do not meet process requirements. This study prepared coatings with high microhardness and flexural strength by mixing YCF102 alloy powder with different Co contents. The results showed that an increase in Co content did not result in a monotonic change in microhardness, but significantly improved flexural strength. A Co content of 8 wt% in the mixed powder led to a coating with high microhardness and flexural strength, providing a theoretical and practical basis for future research in laser cladding for machine tool repairs.
RAPID PROTOTYPING JOURNAL
(2022)
Article
Engineering, Mechanical
Liaoyuan Chen, Tianbiao Yu, Ying Chen, Wanshan Wang
Summary: This study improves the dimensional accuracy of inclined thin-walled parts fabricated by laser direct metal deposition under an open-loop control system through an adaptive slicing method and feedback adjustment of deposition height. Optimizing the defocus amount enables the matching of deposition thickness and adaptive slicing height, resulting in improved dimensional accuracy and a negative feedback of the thin-wall part height.
RAPID PROTOTYPING JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Xuewei Zhang, Tianbiao Yu, Pengfei Xu, Ji Zhao
Summary: An intelligent system for evaluating sustainability performance of micro milling process is proposed in this paper, using PCA and BP algorithms. By integrating various algorithms and networks, the tool life of micro cutting tools can be predicted more accurately, optimizing the sustainability of the micro milling process.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Boxue Song, Tianbiao Yu, Xingyu Jiang, Wenchao Xi, Xiaoli Lin, Zhelun Ma, Zhao Wang
Summary: This study developed and validated a numerical model of multilayer directed energy deposition based on the single-layer directed energy deposition, with the aim of revealing the cladding forming process and solidification structure in this process. The simulation results showed the complex Marangoni convection pattern generated by the surface tension gradient in the melt pool. Additionally, the study found that multilayer directed energy deposition enhanced the penetration effect of the melt pool and resulted in a cross-layer mass transfer different from single-layer directed energy deposition. The study also analyzed the evolution of the multilayer cladding and the shift of its growth orientation, and predicted the relationship between cladding grain size and solidification properties.
ADDITIVE MANUFACTURING
(2022)
Article
Environmental Sciences
Boxue Song, Xingyu Jiang, Song Wang, Qing Liu, Tianbiao Yu
Summary: Low parts utilization, high resource consumption, and low profit margins are hindering the development of machine tool remanufacturing in China. A case study was conducted on a machine tool manufacturing company to improve the remanufacturing production line, which included remaining life assessment, additive manufacturing, quality monitoring, and reassembly quality control. The new production line reduced energy consumption and water consumption of each remanufactured machine tool and decreased pollutants generated. Despite satisfactory results, machine remanufacturing still faces difficulties in China. Suggestions for promoting remanufacturing in Chinese manufacturing companies were provided based on the case study.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
