Article
Energy & Fuels
V. Vipin, Kshma Trivedi, Santanu Koley
Summary: This study investigates the power absorption of a submerged piezoelectric wave energy converter (PWEC) device floating over a rippled seabed under the linear water wave theory. The effects of various structural parameters on the power generation of the PWEC device are examined.
Article
Thermodynamics
Wu Nan, He Yuncheng, Fu Jiyang
Summary: This paper presents a novel bistable piezoelectric energy harvester that collects kinetic energy from ambient vibrations for powering microelectronics sustainably. Experimental results show that the harvester performs well under different conditions.
Article
Engineering, Mechanical
Shen Li, Zhiqiang Feng, Xuefeng He, Yizhou Ye, Jinghua Li
Summary: This study presents an in-plane omnidirectional flutter piezoelectric wind energy harvester (PWEH) composed of a hollow cylindrical shell and several piezoelectric composite beams. It exhibits high electrical output over a wide wind speed range, regardless of wind direction.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Energy & Fuels
Wonil Kwak, Yongbok Lee
Summary: This study focuses on improving the energy efficiency of a piezoelectric energy harvester with a novel fractal structure by optimizing a model and investigating coupling coefficients. The fractal design efficiently converts energy responses at various frequencies.
Article
Energy & Fuels
Angeliki Deligianni, Leonidas Drikos
Summary: The sustainable development principles emphasize the utilization of renewable energy sources to protect our fragile ecosystems. Among them, ocean wave energy has gained global attention and is considered a leading contender. However, current wave energy collection methods have limitations and technical immaturity, which calls for a more advanced and innovative solution.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Thermodynamics
Chengwei Hou, Xiaofan Zhang, Han Yu, Xiaobiao Shan, Guangdong Sui, Tao Xie
Summary: Origami-inspired bistable piezoelectric energy harvester, combining origami structure with piezoelectric theory, is proposed in this study. The mathematical model of the harvester is established and the dynamic responses and harvesting characteristics are explored through theoretical and experimental methods. The experiment shows that the harvester has high output performance, with great potential to provide continuous power for condition or biological monitoring equipment.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Seung-Bum Kim, Joonchul Shin, Hyun-Soo Kim, Dong-Gyu Lee, Jong-Chan Park, Jeong Min Baik, Soo Young Kim, Chong-Yun Kang, Wonjoon Choi, Hyun-Cheol Song, Sunghoon Hur
Summary: This paper proposes an advanced design of a hybrid energy harvester that combines piezoelectricity and thermoelectricity to achieve a higher power generation. By using a piezoelectric cantilever beam and leveraging oscillation-induced heat dissipation, temperature gradients are increased to prevent thermal saturation and sustain thermoelectric power generation.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Civil
Nan Wu, Yuncheng He, Jiyang Fu, Peng Liao
Summary: The paper introduces a novel bistable piezoelectric energy harvester that utilizes VIV to trigger switching between stable states, resulting in significant energy output.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2021)
Article
Mechanics
Yu Chen, Zhichun Yang, Shengxi Zhou
Summary: A high-performance wind-induced vibration energy harvester with an angle section head is designed, which demonstrates a wide operating wind speed range and high output power.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Engineering, Mechanical
Josh Davidson, Tamas Kalmar-Nagy, Giuseppe Habib
Summary: This paper investigates the suppression of parametric resonance in floating bodies using dynamic vibration absorbers. The performance of tuned mass dampers and nonlinear energy sinks in eliminating parametric resonance is compared, as well as the effect of attaching the vibration absorber to different degrees of freedom. The results show that tuned mass dampers outperform nonlinear energy sinks and attaching the vibration absorber to the heave degree of freedom is more effective.
NONLINEAR DYNAMICS
(2022)
Article
Energy & Fuels
Kangda Wang, Daoyu Sun, Xu Zhou, Longlong Wang, Zhizhu He, Zhenghe Song, Zhongxiang Zhu, Zhen Li
Summary: This study developed a novel passive three-phase magnetic field energy harvester (TMEH) for reliable and sustaining power to drive vehicle onboard electronics. A Y-Y topological connection pattern was designed to enhance and stabilize the TMEH output performance, and three auto-shift operating modes were assigned to tackle the dynamic changes of the captured power. The results have indicated that the proposed TMEH showed impressive energy conversion efficiency and capability to power up multiple types of sensors and electronic devices on an electric vehicle.
Article
Mechanics
Md. Mouzakkir Hossain, Chia-Cheng Tsai, Harekrushna Behera
Summary: This study uses linear stability analysis in the two-dimensional Cartesian coordinate system to analyze the flow dynamics underneath a large floating elastic plate over a slippery surface in the presence of external shear. The Orr-Sommerfeld equation and the Rayleigh equation are obtained using normal mode analysis for viscous and inviscid flows, respectively. The Chebyshev collocation method is used to numerically solve both equations. Analysis of the growth rate and energy distributions is performed to understand the flow instability at various flow and structural parameters. The study reveals the effects of uniform mass and structural rigidity on flow stability in both viscous and inviscid flows.
Article
Engineering, Mechanical
Chandana Ravikumar, Vytautas Markevicius
Summary: Energy harvesting technologies and material science enable the conversion of surrounding vibrational energy into useable energy for portable electronics and IoT devices. He materials called ferroelectrets show a piezoelectric response to mechanical strain or vibration, with higher coefficients compared to traditional piezoelectric polymers like PVDF. Designing a polypropylene-based piezoelectric energy harvester requires balancing multiple factors, and this paper investigates the performance and provides suggestions for structural design. The study examines the response and output generated by ferroelectret cellular polypropylene foam, comparing different types of excitations.
Article
Mechanics
R. Calvert, M. L. McAllister, C. Whittaker, A. Raby, A. G. L. Borthwick, T. S. van den Bremer
Summary: Periodic water waves generate Stokes drift affecting the transport of floating marine litter. Different sizes and densities of objects are transported at different rates by waves, with larger buoyant objects potentially experiencing increased drift compared to Lagrangian tracers. This increased drift is due to variable submergence and dynamic buoyancy force components perpendicular to the water surface, leading to an amplification of drift compared to Stokes drift when averaged over the wave cycle.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Rakesha Chandra Dash
Summary: In this research, a stochastic model is developed to analyze the impact of random wind speed fluctuations on the power output of galloping-based piezoelectric energy harvesters (GPEHs). Monte Carlo simulations are employed to evaluate the system performance under different degrees of randomness in wind speed and aerodynamic coefficients. The findings indicate that random variations in the galloping force coefficients have a more significant influence on the electrical power output compared to wind speed, and the non-linear galloping force coefficient has a more pronounced effect on power output than the linear coefficient.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
B. B. Yin, W. K. Sun, Yang Zhang, K. M. Liew
Summary: This study proposes a novel meshfree framework based on bond-based peridynamics (PD) using finite deformation theory to model the large deformation and progressive fracture of hyperelastic materials. The framework introduces an original bond strain and a numerical damping parameter to improve the solution accuracy and stability of explicit time integration. It outperforms grid-based methods in capturing complex crack features and has been successfully validated in various examples. The framework has wide compatibility with hyperelastic models and has potential applications in elastomer-hydrogel composites and soft tissues modeling.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Ecology
Yalong Wang, Chaoying Li, Haidong Liu, Jin Lin, Shouxiang Lu, Kim Meow Liew
Summary: The electric fault arc, especially the series arc, causes numerous electrical fires. Previous studies have limitations in focusing on gaseous atmospheres instead of solid materials, which is not in line with the actual demand, and in restricting the studied external heat sources to cone heaters and flames, neglecting the electric arc. To overcome these limitations, an experimental platform was developed to investigate flame behavior during the ignition of cable insulation material by the fault arc. A flame-extracting and noise-reduction algorithm was proposed to process the high-speed camera's large number of photos. The main findings include the significant role of the appropriate size of the structuring element in filtering the flame region, the increase in mean flame area with system load growth, and the more prominent flame size and frequency in specific locations with increased system load. The in-depth understanding of flame behavior provided by this work will contribute to optimizing electric system design and disaster prevention.
Article
Chemistry, Physical
Gen Li, Arslan Akbar, Lu-Wen Zhang, F. Rosei, K. M. Liew
Summary: Solid substrates of cementitious composites in high salinity and humidity environments are covered by fluid water, which affects the wetting behavior of cement hydrates and chloride ingress phenomena. This study investigates the nanoscale wetting behaviors of calcium silicate hydrate (C-S-H) and proposes a surface modification strategy using fluoroalkylsilane (FAS) to control hydrophobicity. Molecular dynamic simulation reveals that FAS creates superhydrophobic surfaces, eliminating calcium leaching by hindering ionic interactions and blocking chloride adsorption and invasion.
APPLIED SURFACE SCIENCE
(2023)
Article
Mechanics
B. B. Yin, Arslan Akbar, Yang Zhang, K. M. Liew
Summary: This study presents a coupled phase-field cohesive modeling framework that can accurately capture the progressive failure and damage behaviors of multiphasic microstructures and multifiber systems. The framework includes novel aspects such as a newly developed scalar indicator, periodic boundary conditions, and characterization of various failure modes. Parametric studies show consistent results with experiments and reveal the effects of fiber distributions, fiber volume fractions, and boundary conditions on the mechanical behaviors of fiber-reinforced composites. The results demonstrate the potential of the framework in evaluating the mechanical performances of composite materials in engineering applications.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
D. A. Abdoh, Yang Zhang, A. S. Ademiloye, V. K. R. Kodur, K. M. Liew
Summary: In order to predict the heating and cooling behaviors of laminated glass facades exposed to fire, a precise and efficient computer model is developed. An efficient three-dimensional finite difference method (3DFDM) is proposed to reduce the computational requirements associated with simulating heat transfer in layered structures with a down-flowing water film. A unique computational algorithm for particle labeling is developed to capture the moving particles of the water film, which significantly reduces the computational effort.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Gen Li, Arslan Akbar, Lu-Wen Zhang, Federico Rosei, K. M. Liew
Summary: This article focuses on an original molecular pathway to predict the durability and analyze the environmental impact of fluoroalkyl-silane (FS) based additive modified cementitious composites in marine environment. By revealing the calcium leaching behaviors of cement composites through molecular simulation, the study evaluates the porosity and chloride diffusion coefficient to determine their lifespan. The results show that FS surface modification can eliminate decalcification, decrease porosity, and slow down chloride accumulation. The optimal mixing content of 0.762 wt % FS significantly reduces repair frequencies and diminishes CO2 emissions and non-renewable energy consumption by 52.33% and 31.07% respectively. This research provides atomic understanding for improving the durability of cement composites and proposes strategies to predict their service life and environmental impact.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Analytical
Yalong Wang, Ning Kang, Jin Lin, Shouxiang Lu, Kim Meow Liew
Summary: Flame retardant cables are widely used, but the thermal degradation behavior of PVC cable insulation materials with different flame-retardant levels has not been extensively studied. Four flame-retardant and one non-flame-retardant PVC cable insulation materials were analyzed using thermogravimetric analysis. The results show differences in the first peaks of the thermal degradation behavior, but similarities in the second peaks. Evaluating the flame-retardant performance solely based on activation energy is not sufficient. The findings provide a basis for evaluating the thermal degradation behavior of PVC cable insulation materials and can be useful for numerical simulations of electrical fires.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Materials Science, Multidisciplinary
Wei-Kang Sun, B. B. Yin, Lu-Wen Zhang, K. M. Liew
Summary: To develop better diagnosis and treatment techniques for cardiovascular diseases, such as aneurysms, it is urgent to have a deeper understanding of the biomechanical mechanisms and failure behaviors of blood vessels. This study proposes a novel virtual bar model for surrounding tissues and correlates the residual stress and loads from the surrounding tissues with the perivascular pressures of the blood vessels. Additionally, a meshfree framework is developed to model the deformation and rupture of blood vessels using the Fung-type hyperelasticity and the Casson's non-Newtonian fluid model. The study successfully captures the blood pressure-induced spontaneous ruptures of blood vessels.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Chemistry, Physical
Xiongfei Gao, Lu-Wen Zhang, K. M. Liew
Summary: This study reveals the electric double layer (EDL) structure at the interface between gallium-based liquid metal (GBLM) electrode and aqueous electrolyte for the first time, using density functional theory (DFT) calculation and ab initio molecular dynamics (AIMD) simulation. The EDL structure originates from the specific adsorption of gallates on GBLM, forming an inner Helmholtz layer (IHL) and attracting a diffusion layer with opposite charges. The excess negative charge on GBLM surface interferes with the adsorbed gallates and amplifies the interface potential change across EDL. The proposed EDL structure contributes to a deeper understanding of the electrochemical processes occurring at the electrode-electrolyte interface in GBLM aqueous batteries.
APPLIED SURFACE SCIENCE
(2023)
Article
Mechanics
A. O. Sojobi, K. M. Liew
Summary: High performance column composites are multifunctional composites designed to improve resilience of structures and infrastructures. They have been found attractive in earthquake-prone regions for their superior mechanical performance.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
B. B. Yin, W. K. Sun, Yang Zhang, K. M. Liew
Summary: Polymer gels can be effectively simulated using a three-dimensional meshfree framework based on bond-based peridynamics, which enables dynamic simulations with complex geometric configurations. The proposed method exhibits superior performance in modeling blunt impacts on polymer gels compared to finite element counterparts, and can be easily extended to penetration impact problems.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Jiasheng Huang, Lu-Wen Zhang, K. M. Liew
Summary: This work proposes a novel hybrid polymer-water model within the peridynamics (PD) framework to accurately clarify the complex damage process of soft materials subject to ballistic penetration. The superior effectiveness and applicability of the proposed model are demonstrated through compression, shear, and fracture tests. The proposed model offers a reasonable and practical representation of soft material from the perspective of a particle-based approach and enhances the potential applications of PD framework for simulating the large deformation and dynamic response of soft materials.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Weiwei Zhang, Hao Yu, Binbin Yin, Arslan Akbar, K. M. Liew
Summary: This review explores the recycling of end-of-life wind turbine blades (EoL-WTBs) and their potential applications in civil engineering. Mechanical, thermal, and chemical recycling methods are examined, highlighting the hierarchical valorization of EoL-WTBs recyclates in construction. However, challenges such as technical complexity, cost, market demand, and regulatory frameworks hinder widespread adoption. Standardization, efficient transportation systems, well-structured recycling supply chains, and economic feasibility analysis are recommended to address these issues.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
B. B. Yin, Gen Li, Yang Zhang, K. M. Liew
Summary: In this study, a molecular model was developed to describe the optimized properties of LC3 blend, revealing the relationship between its structure and mechanical properties, tensile deformation behaviors, and failure mechanisms. The findings provide insights into the development of sustainable cementitious composites for the construction industry with lower environmental impacts.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Multidisciplinary
W. K. Sun, B. B. Yin, Arslan Akbar, V. K. R. Kodur, K. M. Liew
Summary: This paper proposes a variable timestep-strategy to accelerate the peridynamic modeling of thermomechanical cracking, and demonstrates its advantages in various aspects.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
