Review
Engineering, Chemical
Hamid Ghorabaee, Mohammad Reza Sarmasti Emami, Farhad Moosakazemi, Nader Karimi, Goshtasp Cheraghian, Masoud Afrand
Summary: The study aims to analyze the impact of nanofluids on the thermal characteristics of thermosyphon heat pipes, finding that nanofluids can significantly reduce thermal resistance and improve thermal efficiency. Research shows that the thermal performance of THP is closely related to operating variables, nanoparticle types, and heat inputs.
Article
Thermodynamics
Huanguang Wang, Yuming Tang, Meng Liu, Shuai Zhu, Keqing Zheng, Xueping Du
Summary: Rotating heat pipe has high heat transfer performance, but the research on its heat transfer mechanism is insufficient. This study made a horizontal axially rotating heat pipe and conducted experiments, finding that the optimal filling ratio is about 39.2%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Zhicheng Zhou, Yaojie Lv, Jian Qu, Qin Sun, Dmitrii Grachev
Summary: This study developed a hybrid oscillating heat pipe using CNT nanofluids for cooling electric vehicle batteries, demonstrating improved heat transfer performance and reduced battery pack temperature.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Guolong Li, Jin Wang, Hongxing Zheng, Gongnan Xie, Bengt Sunden
Summary: This study investigates the convective heat transfer enhancement of Fe3O4-water nanofluid by introducing carbon nanotubes and applying a magnetic field. The results show significant improvement in heat transfer performance by adding carbon nanotubes to the nanofluid and subjecting it to a magnetic field under certain experimental conditions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Energy & Fuels
Tianyuan Zhao, Zhengyuan Ma, Zikang Zhang, Weizhong Deng, Rui Long, Wei Liu, Lei Ma, Zhichun Liu
Summary: This study investigated a loop heat pipe system with nanofluids as the working fluid, showing that nanofluids can increase the maximum heat load and reduce the startup heat load, further improving the thermal performance of the system. Moreover, in the load variation and performance degradation tests, the system exhibited faster response speed and smaller temperature fluctuations when using nanofluids, indicating a positive impact on system performance.
Review
Chemistry, Physical
Stephan Pierre Louis, Svetlana Ushak, Yanio Milian, Magdalena Nems, Artur Nems
Summary: This review discusses the impact of nanoparticles on nanofluid properties, including factors such as concentration, size, and shape. High thermal conductivity nanoparticles can improve the heat transfer coefficient, and metallic oxide nanoparticles show up to 30% enhancement. Additionally, nanoparticle size and shape affect the viscosity and density of the nanofluid.
Article
Thermodynamics
Ning Qian, Fan Jiang, Marco Marengo, Yucan Fu, Jiuhua Xu
Summary: Grinding of difficult-to-machining materials generates excessive heat. Radial-rotating oscillating heat pipe (RR-OHP) can enhance heat transfer and control the temperature during grinding. Experimental results demonstrate that RR-OHP improves heat transfer efficiency in grinding process significantly.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Haojie Zhang, Wenwen Guo, Long Guo, Guoneng Li, Youqu Zheng, Cong Dong, Haoxiang Zhou
Summary: The combination of nanofluids and pulsation was used to enhance heat transfer in a mini-channel corrugated tube, resulting in a maximum enhancement of 21.8% using distilled water as the medium. When 0.5% Al2O3/DW nanofluids were used as the heat transfer medium, Nunf/Nubf increased by 16% at Re = 1100. A pulsation wave generator was designed and the optimal St for each Re was determined, with lower Re values corresponding to higher optimum St values. The best heat transfer enhancement achieved in this study was 147% at St = 0.034, Re = 747, and A = 3.85.
Article
Energy & Fuels
A. Allouhi, M. Benzakour Amine
Summary: This study aims to characterize the performance of a heat pipe flat plate solar collector using different nanofluids, with CuO-based nanofluid showing the highest enhancements in energetic and exergetic efficiencies. The decrease in specific heat of nanofluids is identified as the main thermal property responsible for performance improvement.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Thermodynamics
Fangqiong Luo, Chi Ma, Jialan Liu, Lin Zhang, Shilong Wang
Summary: A new rotating heat pipe (RHP) is designed to solve the heat dissipation problem and thermal-induced error of high-speed motorized spindle (HSMS). The RHP is verified through theoretical and experimental studies, and embedded into the HSMS to improve the heat dissipation performance and control the thermal-induced error. The effectiveness of the designed RHP and established fluid-thermal-solid interaction models are verified through thermal behavior experiments.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Jiajia Chen, Yucan Fu, Ning Qian, Huafei Jiang, Chan Y. Ching, Dan Ewing, Chenwei Dai
Summary: A new cooling method incorporating an axially rotating heat pipe (RHP) has been proposed for profile grinding, demonstrating great cooling advantages compared to traditional methods. The study analyzed the cooling behavior through simulation and experimental grinding of titanium alloys, providing insights for green machining in industrial products with complex profiles.
APPLIED THERMAL ENGINEERING
(2021)
Article
Environmental Sciences
Mohammad Shafiey Dehaj, Mehdi Ahmadi, Mostafa Zamani Mohiabadi
Summary: The study indicated that using metal oxide nanofluids can significantly improve the efficiency of heat pipe solar collectors, with a maximum efficiency of 83% achieved. Furthermore, increasing the mass concentration of metal oxide nanoparticles and volume flow rate can further enhance the efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Chemical
Zi Ding, Cong Qi, Tao Luo, Yuxing Wang, Jianglin Tu, Chengchao Wang
Summary: The study showed that TiO2-H2O nanofluids and corrugated pipes significantly improved the heat transfer efficiency of double-pipe heat exchangers.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Review
Thermodynamics
Norhazwani Abd Malek, Siti Ujila Masuri, R. Saidur, Che Nor Aiza Jaafar, Eris Elianddy Supeni, Muhammad Anis Khaliquzzama
Summary: This paper reviews the effect of morphology on heat transfer enhancement in nanofluids containing low-dimensional nanomaterials. The impact of morphology on heat transfer in nanofluids is still unclear. By examining experimental and theoretical studies on the effect of morphology on heat transfer enhancement in nanofluids, a better understanding of heat transfer mechanisms can be achieved.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Seyed Soheil Mousavi Ajarostaghi, Mohammad Zaboli, Mehdi Nourbakhsh
Summary: The study evaluated the heat transfer performance of hybrid nanofluids in a pipe with a vortex generator, showing that using a vortex generator and hybrid nanofluids can increase heat transfer rate. The MWCNT-Fe3O4/water hybrid nanofluid demonstrated better thermal performance at all Reynolds numbers, with higher thermal performance growth rate at lower Reynolds numbers.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Multidisciplinary
A. A. Aganin, A. I. Davletshin
Summary: A mathematical model of interaction of weakly non-spherical gas bubbles in liquid is proposed in this paper. The model equations are more accurate and compact compared to existing analogs. Five problems are considered for validation, and the results show good agreement with experimental data and numerical solutions. The model is also used to analyze the behavior of bubbles in different clusters, providing meaningful insights.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Hao Wu, Jie Sun, Wen Peng, Lei Jin, Dianhua Zhang
Summary: This study establishes an analytical model for the coupling of temperature, deformation, and residual stress to explore the mechanism of residual stress formation in hot-rolled strip and how to control it. The accuracy of the model is verified by comparing it with a finite element model, and a method to calculate the critical exit crown ratio to maintain strip flatness is proposed.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Shengwen Tu, Naoki Morita, Tsutomu Fukui, Kazuki Shibanuma
Summary: This study aimed to extend the finite element method to cope with elastic-plastic problems by introducing the s-version FEM. The s-version FEM, which overlays a set of local mesh with fine element size on the conventional FE mesh, simplifies domain discretisation and provides accurate numerical predictions. Previous applications of the s-version FEM were limited to elastic problems, lacking instructions for stress update in plasticity. This study presents detailed instructions and formulations for addressing plasticity problems with the s-version FEM and analyzes a stress concentration problem with linear/nonlinear material properties.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Bo Fan, Zhongmin Wang
Summary: A 3D rotating hyperelastic composite REF model was proposed to analyze the influence of tread structure and rotating angular speed on the vibration characteristics of radial tire. Nonlinear dynamic differential equations and modal equations were established to study the effects of internal pressure, tread pressure sharing ratio, belt structure, and rotating angular speed on the vibration characteristics.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
X. W. Chen, Z. Q. Yue, Wendal Victor Yue
Summary: This paper examines the axisymmetric problem of a flat mixed-mode annular crack near and parallel to an arbitrarily graded interface in functionally graded materials (FGMs). The crack is modeled as plane circular dislocation loop and an efficient solution for dislocation in FGMs is used to calculate the stress field at the crack plane. The analytical solutions of the stress intensity factors are obtained and numerical study is conducted to investigate the fracture mechanics of annular crack in FGMs.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Xumin Guo, Jianfei Gu, Hui Li, Kaihua Sun, Xin Wang, Bingjie Zhang, Rangwei Zhang, Dongwu Gao, Junzhe Lin, Bo Wang, Zhong Luo, Wei Sun, Hui Ma
Summary: In this study, a novel approach combining the transfer matrix method and lumped parameter method is proposed to analyze the vibration response of aero-engine pipelines under base harmonic and random excitations. The characteristics of the pipelines are investigated through simulation and experiments, validating the effectiveness of the proposed method.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Xiangyu Sha, Aizhong Lu, Ning Zhang
Summary: This paper investigates the stress and displacement of a layered soil with a fractional-order viscoelastic model under time-varying loads. The correctness of the solutions is validated using numerical methods and comparison with existing literature. The research findings are of significant importance for exploring soil behavior and its engineering applications under time-varying loads.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Thuy Dong Dang, Thi Kieu My Do, Minh Duc Vu, Ngoc Ly Le, Tho Hung Vu, Hoai Nam Vu
Summary: This paper investigates the nonlinear torsional buckling of corrugated core sandwich toroidal shell segments with functionally graded graphene-reinforced composite (FG-GRC) laminated coatings in temperature change using the Ritz energy method. The results show the significant beneficial effects of FG-GRC laminated coatings and corrugated core on the nonlinear buckling responses of structures.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Zhihao Zhai, Chengbiao Cai, Qinglai Zhang, Shengyang Zhu
Summary: This paper investigates the effect of localized cracks induced by environmental factors on the dynamic performance and service life of ballastless track in high-speed railways. A mathematical approach for forced vibrations of Mindlin plates with a side crack is derived and implemented into a train-track coupled dynamic system. The accuracy of this approach is verified by comparing with simulation and experimental results, and the dynamic behavior of the side crack under different conditions is analyzed.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
James Vidler, Andrei Kotousov, Ching-Tai Ng
Summary: The far-field methodology, developed by J.C. Maxwell, is utilized to estimate the effective third order elastic constants of composite media containing random distribution of spherical particles. The results agree with previous studies and can be applied to homogenization problems in other fields.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Kim Q. Tran, Tien-Dat Hoang, Jaehong Lee, H. Nguyen-Xuan
Summary: This study presents novel frameworks for graphene platelets reinforced functionally graded triply periodic minimal surface (GPLR-FG-TPMS) plates and investigates their performance through static and free vibration analyses. The results show that the mass density framework has potential for comparing different porous cores and provides a low weight and high stiffness-to-weight ratio. Primitive plates exhibit superior performance among thick plates.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Bence Hauck, Andras Szekrenyes
Summary: This study explores several methods for computing the J-integral in laminated composite plate structures with delamination. It introduces two special types of plate finite elements and a numerical algorithm. The study presents compact formulations for calculating the J-integral and applies matrix multiplication to take advantage of plate transition elements. The models and algorithms are applied to case studies and compared with analytical and previously used finite element solutions.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Wu Ce Xing, Jiaxing Wang, Yan Qing Wang
Summary: This paper proposes an effective mathematical model for bolted flange joints to study their vibration characteristics. By modeling the flange and bolted joints, governing equations are derived. Experimental studies confirm that the model can accurately predict the vibration characteristics of multiple-plate structures.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Pingchao Yu, Li Hou, Ke Jiang, Zihan Jiang, Xuanjun Tao
Summary: This paper investigates the imbalance problem in rotating machinery and finds that mass imbalance can induce lateral-torsional coupling vibration. By developing a model and conducting detailed analysis, it is discovered that mass imbalance leads to nonlinear time-varying characteristics and there is no steady-state torsional vibration in small unbalanced rotors. Under largely unbalanced conditions, both resonant and unstable behavior can be observed, and increasing lateral damping can suppress instability and reduce lateral amplitude in the resonance region.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Yong Cao, Ziwen Guo, Yilin Qu
Summary: This paper investigates the mechanically induced electric potential and charge redistribution in a piezoelectric semiconductor cylindrical shell. The results show that doping levels can affect the electric potentials and mechanical displacements, and alter the peak position of the zeroth-order electric potential. The doping level also has an inhibiting effect on the first natural frequency. These findings are crucial for optimizing the design and performance of cylindrical shell-shaped sensors and energy harvesters.
APPLIED MATHEMATICAL MODELLING
(2024)