Review
Engineering, Chemical
Elham Abohamzeh, Fatemeh Salehi, Mohsen Sheikholeslami, Rouzbeh Abbassi, Faisal Khan
Summary: The study highlights the advantages of hydrogen as a clean fuel but also addresses serious safety concerns associated with its use. Detailed risk analysis, including consequence modeling and computational fluid dynamics, is essential for ensuring safe operation. Safety challenges in hydrogen storage, transmission, and application processes are comprehensively reviewed and analyzed.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2021)
Article
Engineering, Aerospace
Peter L. Bishay, Christian Aguilar
Summary: Although the benefits of morphing wings have been proven in many studies, the conflicting design requirements of high out-of-plane stiffness and low in-plane stiffness remain a challenge for advancing morphing technology. Advances in hybrid and flexible composites may provide design solutions with a balance in stiffness. A parametric study of a composite skin for twist-morphing wings was conducted, considering design parameters such as the number of plies, fiber-orientation angle, and torsional rigidity. Analysis showed that torsional compliance can be increased by adjusting certain parameters, but at the expense of out-of-plane stiffness. The study highlights the nonlinear relationship and effects of different parameters on the behavior of the skin.
Article
Energy & Fuels
Pranjali Sharma, Hafijul Hossain Sardar, Swati Neogi
Summary: This study focuses on the failure of Type-4 composite cylinders caused by thermal degradation. Finite element analysis is used to predict the ultimate hoop stress of composite rings, and models for various tests are developed and experimentally validated.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Environmental
Gabriel Wosiak, Sthefany S. Sena, Evaldo B. Carneiro-Neto, Mauro C. Lopes, Ernesto Pereira, Jeyse da Silva
Summary: This study provides a CFD simulation of an alkaline water electrolyzer which takes into consideration the electrolyte's performance, electrode materials, separator membrane, and the impact of generated bubbles in the electrolysis process. The presence of bubbles affects the cell potential and local current distribution, directly impacting the efficiency of the process. A factorial design was conducted to analyze the contribution of electrode material, applied current density, and presence of gas bubbles to the cell potential and their interactions. Additionally, it was found that high current densities result in non-uniform local current distribution and increased energy consumption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Construction & Building Technology
I. R. Upasiri, K. M. C. Konthesigha, S. M. A. Nanayakkara, K. Poologanathan, P. Gatheeshgar, D. Nuwanthika
Summary: Composite Sandwich Panels (CSP) with AAC core showed improved insulation fire rating compared to CSP with FC core, with the best performance seen in FC CSP with a density of 1000 kg/m(3). AAC CSP also outperformed FC CSP with a density of 650 kg/m(3). Both materials can be utilized for composite sandwich panels with better thermal and mechanical performance.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Thermodynamics
Jianning Zhao, Dong Wei, Yiyang Dong, Dong Zhang, Donghuan Liu
Summary: This paper investigates the thermoelastic coupling response of a cylindrical thermal rectifier and analyzes the effects of initial interface gap, boundary conditions, geometry parameters, and material pairs on the thermal rectification ratio using numerical methods. The results show that the equivalent thermal conductance is the key factor for optimizing the thermal rectification ratio, and adjusting the initial interface gap can switch the status of the interface gap and achieve the maximum thermal rectification ratio.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Construction & Building Technology
Zhongnan Ye, Shu-Chien Hsu
Summary: This paper presents a machine learning framework for real-time prediction of structural fire response, integrating Computational Fluid Dynamics and Finite Element Methods. Multiple ML models are developed and evaluated, with results showing the effectiveness of Random Forest and Gradient Boosting models in real-time displacement prediction, indicating the feasibility of the framework in providing timely and reliable predictions of structural safety conditions for firefighters.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Engineering, Civil
Ming Li, Hualin Fan
Summary: The paper investigates the free vibration behaviors of novel hierarchical Isogrid stiffened cylinders (HISCs) through experiments and simulations. A nondestructive vibration correlation technique (VCT) is proposed to evaluate composite properties of HISC affected by manufacturing process, redefining fiber volume fraction. The hierarchical structure's effect on fundamental frequency is studied, along with advantages over Isogrid stiffened cylinder (ISC) for optimal design reference.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
X. Lu, X. M. Guo
Summary: In this study, a non-local continuum damage model is developed to analyze the progressive failure of laminated composites. The model incorporates an orthotropic non-local integral strategy with two internal length scales, allowing for accurate predictions of damage evolution. Additionally, an interactive damage transfer scheme is proposed to capture the interaction between matrix cracking and interface delamination. The model demonstrates superior performance over conventional methods in predicting the complex failure mechanisms of composite laminates.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Elisabetta Manconi, Brian R. R. Mace, Rinaldo Garziera
Summary: This article presents a numerical computation method for wave propagation in laminated cylinders with internal fluid and residual stress using a Wave Finite Element formulation for 2D waveguides. The method models only a small segment of the system, resulting in a low-order finite element model, and applies the theory of wave propagation in 2D periodic structures. The method utilizes standard finite element formulations and commercial FE software, resulting in a significant reduction in computational time while maintaining accuracy. The method is applicable without assumptions related to shell theory or low-frequency analysis and can accurately represent the through-thickness dynamics of the laminated structure using 3D solid elements.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Paulo A. G. Piloto, Stephan Gomes, Leonardo Torres, Carlos Couto, Paulo Vila Real
Summary: LSF walls are popular in modern buildings for their high strength-to-weight ratio and ease of installation. However, the empty cavities within these walls can pose a fire risk. Various modelling techniques, including two-dimensional thermal models, can be used to ensure fire resistance and performance. Three computational solution methods were compared for their fire performance, with method 3 providing the best approximation by capturing the main fire events. Based on a parametric study, a new proposal is presented for predicting fire resistance by insulation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Environmental
A. M. Neves, J. Puszkiel, G. Capurso, J. M. Bellosta von Colbe, T. Klassen, J. Jepsen
Summary: In this study, a comprehensive kinetic model was developed using the separable variable method to describe the dehydrogenation behavior of MgH2 and LiBH4 under different operative conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Mechanics
Ernnie Illyani Basri, Adi Azriff Basri, Sarveshwaaran Balakrishnan, Mohammed Thariq Haji Hameed Sultan, Kamarul Arifin Ahmad
Summary: The use of FSI simulation allows for the integration of aerodynamic loading from the fluid domain with FE analysis from the structural domain, addressing common design problems in aircraft composite wing design.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Construction & Building Technology
Thadshajini Suntharalingam, Perampalam Gatheeshgar, Irindu Upasiri, Keerthan Poologanathan, Brabha Nagaratnam, Marco Corradi, Dilini Nuwanthika
Summary: This study investigated the fire performance of different types of 3D printed concrete walls using validated Finite Element Models (FEMs), finding that under standard fire conditions, non-load bearing cavity walls underperform compared to solid walls, while composite walls with the use of Rockwool as insulation offer superior fire resistance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Engineering, Environmental
Mattia Carboni, Gianmaria Pio, Chiara Vianello, Ernesto Salzano
Summary: The investigation focused on the consequences of accidental release of biogas containing hydrogen sulfide, showing significant impact of hydrogen sulfide toxicity on safety distance and negligible impact on flammability concerns.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Thermodynamics
Fei Tang, Qing He, Jennifer Wen
COMBUSTION AND FLAME
(2019)
Article
Chemistry, Physical
Chao Zhang, Jennifer Wen, Xiaobo Shen, Guangli Xiu
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Engineering, Chemical
Trygve Skjold, Helene Hisken, Laurence Bernard, Lorenzo Mauri, Gordon Atanga, Sunil Lakshmipathy, Melodia Lucas, Marco Carcassi, Martino Schiavetti, Vendra Chandra Madhav Rao, Anubhav Sinha, Jennifer X. Wen, Ilias C. Tolias, Stella G. Giannissi, Alexandros G. Venetsanos, James R. Stewart, Olav Roald Hansen, Chenthil Kumar, Laurent Krumenacker, Florian Laviron, Romain Jambuti, Asmund Huser
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2019)
Article
Thermodynamics
Depeng Kong, Rongqi Peng, Ping Ping, Jin Du, Guoming Chen, Jennifer Wen
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
Kazui Fukumoto, Jennifer X. Wen, Manhou Li, Yanming Ding, Changjian Wang
COMBUSTION AND FLAME
(2020)
Article
Engineering, Chemical
Reza Khodadadi Azadboni, Ali Heidari, Jennifer X. Wen
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2020)
Article
Engineering, Civil
Fei Tang, Peng Hu, Jennifer Wen
Summary: The lateral ceiling temperature distribution induced by wall-attached fires with various burner aspect ratios in underground spaces was experimentally investigated. Different aspect ratios of rectangular gas burners were found to result in varying lateral ceiling temperature distributions, with an increase in burner aspect ratio leading to higher temperatures at specific locations below the ceiling.
FIRE SAFETY JOURNAL
(2021)
Article
Energy & Fuels
Chao Zhang, Xiaobo Shen, Jennifer X. Wen, Guangli Xiu
Article
Thermodynamics
Leonid A. Dombrovsky, Vladimir Yu Levashov, Alexei P. Kryukov, Siaka Dembele, Jennifer X. Wen
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Nanoscience & Nanotechnology
Zhaoxin Ren, Jennifer X. Wen
Review
Energy & Fuels
Jac Clarke, Wulf Dettmer, Jennifer Wen, Zhaoxin Ren
Summary: Industries worldwide are transitioning to net-zero carbon emissions in response to government policies and strategies addressing climate change. Hydrogen is being increasingly explored as an energy source, particularly in aviation where a renewable alternative to traditional hydrocarbon fuels is crucial. Different storage methods for hydrogen are considered, along with the importance of infrastructure and safety in large-scale conversion. This paper reviews previous research on characterizing unignited and ignited hydrogen jets, focusing on near-field flow structure, dispersion, ignition, flame characteristics, and safety considerations.
Article
Mathematics
Sathian Pookkuttath, Mohan Rajesh Elara, Madan Mohan Rayguru, Zaki Saptari Saldi, Vinu Sivanantham, Balakrishnan Ramalingam
Summary: This work presents the design methodology of an autonomous steam mopping robot named 'Snail', which is eco-friendly and efficient in cleaning and disinfecting indoor floors. The robot's design includes mechanical systems, hardware and software architecture, and motion control system to ensure smooth maneuverability. It is ideal for hospitals and eldercare centers, promoting hygiene and avoiding harsh chemicals.
Article
Construction & Building Technology
Rizuwana Parween, Mohan Rajesh Elara, Zaki Saptari Saldi, Thomas Ng, Madan Mohan Rayguru
Summary: This paper presents a reconfigurable robot, Mantis-mini, developed for glass facade cleaning, with a dry cleaning mechanism and linear actuator based transitioning mechanism. The adhesion performance of the suction module is evaluated using experiments, CFD simulations, and analytically formulated estimation, showing an increase in suction pressure magnitude with suction impeller speed.
Article
Electrochemistry
Haodong Chen, Jonathan E. H. Buston, Jason Gill, Daniel Howard, Rhiannon C. E. Williams, Elliott Read, Ahmed Abaza, Brian Cooper, Jennifer X. Wen
Summary: This study developed a simplified mathematical model for predicting the evolution of heating-induced thermal runaway of lithium-ion batteries. The model was verified through experimental tests and found to accurately predict the critical ambient temperature that triggers battery thermal runaway to be between 127 and 128 degrees Celsius.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Zaki S. Saldi, Bayu Prabowo, Indra Buana, Lina J. Diguna
4TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (I-TREC 2019)
(2020)
