Article
Engineering, Chemical
Lingzhen Kong, Jiaqing Chen, Tian Lan, Huan Sun, Kuisheng Wang
Summary: This study analyzed the primary breakup process of liquid jet column, droplet size and velocity distribution, as well as the hydrodynamic characteristics of gas flow in a tubular gas-liquid atomization mixer. The results showed that the gas flow rate is the main influencing parameter for droplet size and distribution uniformity in atomization.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Jing Zhang, Yibo Gao, Bin Gong, Yaxia Li, Jianhua Wu
Summary: The study investigates the deformation and breakup characteristics of liquid droplets in the concave-wall jet, revealing three different modes of droplet behavior. Droplet breakup mainly occurs in regions with high shear rates.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Energy & Fuels
Igor S. Anufriev, Evgeniy Yu Shadrin, Evgeniy P. Kopyev, Oleg Sharypov
Summary: The study examined the disintegration process of liquid hydrocarbon fuel into droplets under the impact of a superheated steam jet through shadow photography and high-speed visualization. Different types of fuels, including diesel, oil, and kerosene, were tested to determine their spraying conditions in a real burner. The proposed method of fuel spraying was found to provide effective dispersion for high-quality combustion, applicable to liquid fuel burners and low-emission gas turbine engines, even when burning liquid combustible waste.
Article
Thermodynamics
Guofu Sun, Yi Zhan, Tomio Okawa, Mitsuhiro Aoyagi, Akihiro Uchibori, Yasushi Okano
Summary: Experiments were conducted on liquid jets ejected from oval nozzles to investigate the effects of nozzle orifice shape on jet behavior. The study found that the liquid jet exhibited different characteristics at different liquid flow rates. Correlations were established to predict the liquid jet state and characteristics of the secondary droplets produced during jet impact onto a solid surface. This research extended the available knowledge on liquid jet behavior.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Engineering, Chemical
Zi-Yu Wang, Hui Zhao, Wei-Feng Li, Jian-Liang Xu, Hai-Feng Liu
Summary: This study experimentally investigates the influence of shear-thickening behavior on the primary breakup process of suspension jets. The primary breakup morphologies of a cornstarch-water suspension are observed, and a unique hardened breakup mode is observed when the suspension exhibits discontinuous shear thickening. The study also establishes a dimensionless number N and promotes the primary breakup regime map based on N and the Weber number We.
Article
Chemistry, Applied
Dmitriy Gvozdyakov, Andrey Zenkov
Summary: Experimental study on the application of liquid waste of industrial rubber goods (IRG) and waste car oil (WCO) as an additional component of coal-water fuel (CWF) shows that efficient introduction of liquid combustible components (LCC) into CWF is possible, but their concentrations should not exceed 8% by weight. Increasing the concentration of the third component leads to viscosity increase and inhomogeneities in the fuel composition, although it can enhance the calorific value of the fuel.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Mechanics
Rui-Nan Cui, Rui Han, Shao-Cong Pei, Shi-Ping Wang
Summary: In this study, a three-dimensional model is established to investigate the dynamics of underwater explosion bubbles. The model is based on a weakly compressible theory implemented in the boundary integral method. The accuracy and reliability of the model are validated by comparing its results with theoretical solutions, an axisymmetric model, and experimental data. The study systematically explores the jet characteristics of underwater explosion bubbles in the free field and reveals the power laws for the height, width, and velocity of the liquid jet with respect to the buoyancy parameter. The findings show that the strength parameter also plays a significant role in determining the height of the jet, especially when the buoyancy parameter is less than 0.3. The impact of an inclined wall on jet features is further investigated, and an analytical expression for the jet angle near a vertical wall is provided using the Kelvin impulse theory.
Article
Geosciences, Multidisciplinary
Pier Paolo Comida, Pierre-Simon Ross, Bernd Zimanowski, Ralf Buettner, Ingo Sonder
Summary: This article focuses on the primary magma fragmentation process in lava fountains. Experimental results show that magma fragmentation occurs in different stages and is influenced by factors such as magma properties and ejection velocity. The findings are also related to the external aerodynamic effects on the magma jet.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Materials Science, Ceramics
Yuxiang Zhao, Yuxue Ge, Xiaochao Jin, Denise Koch, Robert Vassen, Yao Chen, Xueling Fan
Summary: This paper focuses on the oxidation behavior of novel double-ceramic-layer thermal barrier coatings (DCL TBCs) deposited by atmospheric plasma spraying (APS) and suspension plasma spraying (SPS). Results showed that the developed APS-SPS DCL TBCs have better oxidation resistance than the single layer SPS TBC. In terms of oxidation rate and lifetime, segmented APS-SPS TBCs perform slightly better than columnar APS-SPS TBCs. Among the various APS-SPS TBCs, segmented dense APS-SPS TBCs with low vertical crack density appear to have more potential for industrial application.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Sergejus Lebedevas, Oleh Klyus, Laurencas Raslavicius, Pawel Krause, Paulius Rapalis
Summary: The ability to manage the breakup of droplets and liquid jet atomization in diesel engines is a crucial challenge for unmodified CI engines. A comparative analysis of microalgae oil (MAO100) was conducted to enhance injection and liquid jet breakup characteristics at an elevated temperature. The results revealed distinct zones of intense droplet breakup, independent of fuel type and temperature. Preheated MAO100 exhibited smaller droplet sizes compared to room temperature, suggesting a controlled combustion process through preheating.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Hongwei Zou, Yuhang Chen, Jie Zhang, Zhiyong Tang, Qing Wu
Summary: Inspired by the bionic structure, a honeycomb network was designed and manufactured via 3D-printing based on Bejan's Constructal theory. The flow characteristics of the liquid-liquid system with a very low viscosity ratio were investigated, revealing different flow types in the honeycomb network and competition behaviors of droplet pairs in convergences.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Xiaoying Wang, Xiaohui Zuo, Junfeng Wang, Wei Zhang, Haojie Xu, Dongbao Wang, Yan Zhang, Tianyue Zhao
Summary: This study discusses the mechanism and influencing factors of preparing microspheres using electrostatic spray, providing theoretical guidance for their preparation.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Taki Aissou, Jessica Jann, Nathalie Faucheux, Louis-Charles Fortier, Nadi Braidy, Jocelyn Veilleux
Summary: A new method was developed to spray a uniform composite coating of copper nanoparticles and graphene nanoflakes onto a metal substrate using an inductively-coupled radio frequency plasma torch. The resulting coatings exhibited microstructural uniformity, strong coating splats cohesion, and good retention and dispersion of graphene nanoflakes within the copper matrix. Moreover, the copper-graphene composite coatings showed strong antibacterial properties, achieving a 99% reduction of Escherichia coli bacteria within 1 hour.
APPLIED SURFACE SCIENCE
(2023)
Article
Mechanics
Naoki Horiguchi, Hiroyuki Yoshida, Akiko Kaneko, Yutaka Abe
Summary: In this study, the atomization behavior of a wall-impinging liquid jet in a shallow pool was investigated using numerical simulation and a dispersed-phase tracking method. The results revealed three patterns of droplet formation and theoretical boundaries were established using dimensionless numbers. The mechanisms of droplet formation were identified and the relationship between local behavior and overall atomization of the jet was established. This study clarifies the atomization mechanisms in the liquid film flow of a wall-impinging liquid jet in a shallow pool.
Article
Mechanics
Lijuan Qian, Yeshan Wang, Zhongli Chen, Chenlin Zhu
Summary: In this study, the effect of airflow temperature on the breakup of silicone oil droplets in continuous airflow was investigated. The morphology, deformation stage, and breakup regime map were discussed in detail by varying the airflow temperature and Weber number. The results showed that the airflow temperature had a significant influence on droplet breakup modes and droplet size. The liquid bag growth time accurately described the droplet breakup characteristics.
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)