Article
Computer Science, Interdisciplinary Applications
Simo Wu, Chun Liu, Ludmil Zikatanov
Summary: The EAFE discretization method is proposed to solve the Heat-PNP equations, ensuring the computed charged density functions and temperature function are positive, and providing a thermodynamic consistent discrete energy estimate similar to the second law of the Heat-PNP system.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Mathematics, Applied
Mine Akbas, Leo G. Rebholz
Summary: This paper introduces a modular grad-div stabilization method for approximating solutions of the time-dependent Boussinesq model of non-isothermal flows. Through mathematical analysis, the paper proves the unconditional stability and optimal convergence of the proposed method. Numerical experiments confirm the theoretical findings, demonstrating that the algorithm has a similar positive effect as the usual grad-div stabilization.
APPLIED MATHEMATICS AND COMPUTATION
(2021)
Article
Thermodynamics
Liaqat Ali, Bagh Ali, Danial Habib, Qasem Al Mdallal
Summary: Theoretical work on the non-isothermal flow of micropolar nanofluids with the application of a Hall magnetohydrodynamic (MHD) generator is discussed. The study focuses on the impacts of Joule and viscous dispersion and uses an electromagnetic field orthogonal to the fluid flow. The findings have practical importance for thermally efficient devices.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
V. Karuppasamy Vikraman, G. Boopathi, D. Praveen Kumar, R. Mythili, P. Subramanian
Summary: The study focused on the thermal degradation pattern and pyrolytic kinetics of milk dust powder (MDP), revealing its potential suitability as a candidate for energy conversion through pyrolysis.
Article
Mathematics, Applied
Edward A. Miller, Xi Chen, David M. Williams
Summary: The purpose of this paper is to extend the versatile mixed methods for isothermal flows to simulate non-isothermal incompressible flows and evaluate the proposed methods theoretically and experimentally.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Chemistry, Physical
Yu-Jae Jeon, Jong-Hwan Yun, Min-Soo Kang
Summary: In this study, a eco-friendly composite material with shielding capabilities was developed using the finite element method and numerical analysis. The mechanical properties and material characteristics of the composite material were predicted to determine the ideal AP VF range and the maximum AP VF. It was also found that the Halpin-Tsai model was the most similar numerical analysis model.
Article
Mechanics
Runzhe Kan, Jianxin Nie, Zheng Liu, Qingjie Jiao, Xiaole Sun, Xueyong Guo, Shi Yan, Yanli Zhu
Summary: This paper analyzes the underwater explosion shockwave characteristics of a new generation of aluminized explosives and proposes a non-ideal explosive underwater explosion shockwave model. The results show that the non-ideal behavior of aluminized explosives makes the shockwave energy of underwater explosion more sensitive to the Al/O ratio.
Article
Biotechnology & Applied Microbiology
Kai Ding, Yanbin Zhu, Yifan Zhang, Yonglong Li, Haicheng Wang, Jiaxing Li, Wei Chen, Qi Zhang, Yingze Zhang
Summary: This study found that the PFBN is more effective than CSs and DHSs in stabilizing femoral neck fractures. The PFBN can reduce stress concentration and improve both fracture section and overall stability, making it more in line with the biomechanical characteristics of the proximal femur.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Thaniyaphat Srimontriphakdi, Peerasit Mahasuwanchai, Chainarong Athisakul, Sutat Leelataviwat, Karun Klaycham, Nakhorn Poovarodom, Nuttaphon Magteppong, Somchai Chucheepsakul
Summary: This study presents a non-contact method for evaluating the tension of a large-scale cable-stayed roof. It utilizes 3D laser scanning data to explore the current cable configuration and evaluates the cable tension by minimizing the configuration error. The proposed method is validated through experimental studies and is shown to be an alternative approach for non-contact tension evaluation with reasonable accuracy.
Article
Engineering, Mechanical
J. D. Clayton, J. T. Lloyd, D. T. Casem
Summary: The FE modeling shows accurate reproduction of experimental load-depth curves in dynamic indentation experiments. The dimensional analysis framework improves upon previous work and reveals the sensitivity of predicted response to variations in material properties. Extraction of quasi-static and thermal material properties can be achieved through static indentation and elevated temperature indentation experiments, respectively. The parameterized stress-strain response for Al 6061-T6 obtained from novel instrumented dynamic spherical indentation experiments and FE simulations shows good validation for strain rates up to the order of 103/s.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Composites
Yiwan Sun, Lihai Cai, Weiguang Shao, Wenyan Liu
Summary: This paper explores the effects of woven fabric structures on the biaxial tensile mechanical properties and burst properties of woven fabric for layflat hose. By using a repeat unit cell finite element modeling, the effects of warp yarn spacing and weft yarn linear density on mechanical responses and burst properties are studied, and the finite element method is found to accurately predict the burst pressure of layflat hose.
POLYMER COMPOSITES
(2022)
Article
Automation & Control Systems
Yeong-Maw Hwang, Sheng-Kai Yin, Hao-Cheng Yu, Yun-Hao Tsai
Summary: This paper uses finite element analysis to investigate the plastic deformation and metal flow of metal powder in open-die and closed-die rotating compression forming processes. The accuracy of finite element modeling for rotating compression forming of aluminum powder materials is validated through experiments.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Civil
Fernando Goncalves Garcia, Roberto Ramos Jr
Summary: This study utilizes parametric finite element models to generate design charts for predicting the local buckling behavior of integrally web-stiffened panels subjected to uniaxial compressive loads. The proposed models are validated through numerical and experimental comparisons, revealing a significant increase in local buckling stresses for filleted panels.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Ceramics
Nicolas Lauro, Siham Oummadi, Arnaud Alzina, Benoit Nait-Ali, David S. Smith
Summary: A numerical model was developed to predict the drying behavior of ceramic green bodies, incorporating experimental data to determine input parameters and using a simple method to estimate drying rate. The model showed good agreement with experiments for alumina paste green bodies, and external conditions such as convection coefficient and relative humidity were found to have a sensitive control on drying rate and surface temperature evolution.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Thermodynamics
S. Hasani, Z. Jaafari, A. Seifoddini, P. Rezaei-Shahreza
Summary: The non-isothermal kinetics of nucleation and growth of nano-crystallites in a specific BMG were systematically investigated, revealing that the growth mechanisms of all crystallization stages were controlled by the interface and the nucleation rate increased in the fourth crystallization stage.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Automation & Control Systems
Mohammad Reza Naghdi Sedeh, Abbas Ghaei
Summary: Hybrid machining-forming technology combines thin-structural machining and incremental forming processes to manufacture complex geometry parts. While this technology reduces raw material usage, it faces dimensional and geometric inaccuracies due to springback. Research shows that cutting parameters and residual stresses affect springback, with machining feed rate impacting workpiece fracture during the forming stage.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Javad Alizadeh, Amin Salati, Mohammad Reza Ebrahimi Fordoei, Masoud Panjepour
Summary: The thermodynamics of allotropic transformation in nanocrystalline Fe was studied using molecular dynamics simulation and computational methods to determine Gibbs free energy parameters. The results showed that the allotropic transformation temperature of iron nanocrystal decreases from 900 K to 300 K as the grain size increases.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Electrochemistry
Chunmei Wang, Mark Ricketts, Amir Peyman Soleymani, Jasna Jankovic, James Waldecker, Jixin Chen
Summary: Support carbon corrosion is a major degradation mechanism affecting fuel cell performance. An accelerated stress test was conducted at Ford to evaluate the durability of five MEAs made from CCMs containing different carbon supports, catalyst loadings, compositions, I/C ratios, and ionomer EWs. The study focused on carbon loss, voltage degradation, ECSA loss, catalyst layer thickness reduction, catalyst dispersion change, and electrode porosity change post-AST.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Mahmoud Shayestefar, Alireza Mashreghi, Saeed Hasani, Mohammad Taghi Rezvan
Summary: This study optimized critical process parameters in MnFe2O4 doped by Zn and Dy to achieve high magnetic saturation and fine crystallite size. Taguchi method was used to investigate the effects of various factors, with experimental results showing the significant influence of calcination time and Zn content on crystallite size and magnetic saturation, respectively. The sample optimized by the Taguchi method exhibited the highest Ms value.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hossein Elahi Davaji, Fatemeh Shamoradi, Masoud Panjepour, Mehdi Ahmadian
Summary: The study aimed to synthesize and characterize carbon/carbon composites using the CVI process, finding that increasing the process time led to changes in the density, specific surface area, thermal conductivity coefficient, and bending strength of the samples. The SEM images of the fracture surface indicated a weak interface between the carbon fibers and the carbon layer, with the morphology of carbon growth transitioning from laminar to rough-laminar with longer CVI process duration.
Review
Chemistry, Multidisciplinary
Amir Peyman Soleymani, Lucas R. Parent, Jasna Jankovic
Summary: Environmental pollution has led to the emergence of clean energy devices like PEMFCs as alternative energy generation solutions due to fossil fuel consumption. However, the limitations in performance and durability hinder their widespread adoption, which can be improved by understanding and tuning their catalyst layer structures and compositions. Transmission electron microscopy is among the best characterization tools to analyze the microstructural features of PEMFC catalyst layers, and In-situ techniques can accelerate material development in the PEMFC field by directly observing changes in catalyst materials during operation.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Siavash Aghili, Masoud Panjepour, Mahmood Meratian
Summary: In this study, crystalline metaboric acid powder was dehydrated to boron oxide using thermogravimetry in an argon atmosphere under different heating rates. The kinetic analysis revealed a complex dehydration process with consecutive and parallel regions, each involving different kinetic models. By analyzing the mechanisms in each region separately, the study was able to determine the complex processes based on kinetic results.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Engineering, Chemical
Adrian Serrano Mora, Amir Peyman Soleymani, Jasna Jankovic, David P. Wilkinson, Madjid Mohseni
Summary: This study investigated the gradual changes to the positive activated carbon electrode used in capacitive deionization under different conditions. It was found that dissolved organic matter had little impact on capacitance loss and shift of the point of zero charge (EPZC), while the presence of iron accelerated capacitance loss and delayed the EPZC shift. Elemental analysis revealed that oxygen incorporation mainly occurred on the electrode surface during the early cycling stage, but CO2 evolution became the main reaction as cycling progressed. The wettability of the electrode surface also increased over time.
Article
Materials Science, Multidisciplinary
Siavash Aghili, Masoud Panjepour, Mehran Ghiaci
Summary: This study investigated the oxidation process of fullerene using kinetic analysis and found that the kinetic model R-3 is the controlling mechanism of C-60 oxidation. Oxygen and heat played a central role in the deagglomeration of C-60 particles and consequent oxidation.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Electrochemistry
Zhiqiao Zeng, Ryan Ouimet, Leonard Bonville, Allison Niedzwiecki, Chris Capuano, Katherine Ayers, Amir Peyman Soleymani, Jasna Jankovic, Haoran Yu, Radenka Maric, Stoyan Bliznakov
Summary: In this study, a membrane electrode assembly (MEA) with ultra-low precious metal loadings was fabricated using reactive spray deposition technology (RSDT), and tested for over 5000 hours. Main degradation mechanisms were identified and discussed, providing important insights for improving durability and reducing costs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Multidisciplinary Sciences
Muhammad Naoshad Islam, Abdul Bashith Mansoor Basha, Vinayaraj Ozhukil Kollath, Amir Peyman Soleymani, Jasna Jankovic, Kunal Karan
Summary: This study demonstrates the successful development of low-Platinum content polymer electrolyte fuel cells with high oxygen reduction reaction (ORR) activity and fast oxygen transport by introducing a bottom-up designed spherical carbon support with intrinsic Nitrogen-doping.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Amir Peyman Soleymani, Marcia Reid, Jasna Jankovic
Summary: This research implements an epoxy-free ultramicrotome technique on beginning-of-life (BOL) and end-of-life (EOL) samples of proton exchange membrane fuel cells (PEMFCs) to observe and analyze the electrode structure in detail. Using transmission electron microscopy (TEM) and electron tomography (TEM), images of the ionomer network, carbon particles' structure, and Pt distribution are obtained, providing insights into their structural changes over time.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Mechanical
Sepide Dabbaghi, Azade Jafarizade, Masoud Panjepour, Mahmood Meratian
Summary: This research used numerical simulations to investigate the impact of structural parameters on fluid flow in metallic foams, finding that porosity variations greatly affect fluid flow while changes in pore diameter do not have a significant effect. The pressure gradient decreases as foam size increases, reaching a specific value and then remaining constant, with porosity variations having no effect on this length but pore diameter changes having a significant impact. A correlation was established to improve the Ergun equation for studying and predicting air flow on a large scale in practical engineering problems.
SPECIAL TOPICS & REVIEWS IN POROUS MEDIA-AN INTERNATIONAL JOURNAL
(2021)
