Article
Chemistry, Physical
Yin Guan, Jingwei Fu, Shuang Wu, Chuanpeng Yu, Xiyang Chen, Cheng Zhou
Summary: This paper investigates the dynamical behaviors of water drop impacting and bouncing on an inclined hydrophobic surface with a numerical method. Several key impacting factors are examined, and scaling laws of the nondimensionalized maximum spreading diameters are discovered, providing a useful supplement to the understanding of post-impacting drop behaviors on an inclined hydrophobic surface.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Tushar Srivastava, Santosh Kumar Jena, Sasidhar Kondaraju
Summary: This research investigates the dynamics of droplet spreading on inclined surfaces, identifying three phases: inertia-dominated phase 1, asymmetry in radial evolution in phase 2, and lateral retraction while longitudinal expansion in phase 3.Results show that inertia controls longitudinal spread in phases 1 and 2, while gravity forces dominate in phase 3, with the experimental and model results showing good agreement.
Article
Optics
Mareddi Bharath Kumar, Daekyung Kang, Mohammad Awwal Adeshina, Soobae Kim, Taewan Kim, Jonghoo Park
Summary: The electro-optic diffractive multifocal lens combines multiple focal points and can correct complex visual problems through electrical switching without compromising the field of view, providing new possibilities for ophthalmic applications.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ivan Kuric, Vladimir Tlach, Milan Saga, Miroslav Cisar, Ivan Zajacko
Summary: This study explored the application of Renishaw Ballbar QC20-W on robots, verifying the movement of robot joints on an inclined plane. The results showed that changing the configuration of the robot arm has the greatest impact on the shape of the circular path.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Fengchao Li, Ying Hu, Yu Fu, Guangtao Li, Ronggang Wei, Chao Li, Chunbo Hu
Summary: An experimental system was designed to investigate the impact process of molten Al droplets on the walls of a combustion chamber. Empirical correlations for the residence time and spreading diameter of the droplets were established, and a theoretical model was developed to analyze the energy distribution during the collision. The results provide a theoretical basis for the design of thermal protection systems for solid rocket motors.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Chemical
Xiaofeng Jiang, Shixing Chen, Enle Xu, Xianliang Meng, Guoguang Wu, Huai Z. Li
Summary: This study investigates the downhill motion of liquid drops and liquid marbles using two distinct particle-laden interfaces. It is found that liquid marbles have a lower velocity than liquid drops but a higher maximum aspect ratio, indicating different interactions due to particles present on different surfaces.
Article
Engineering, Multidisciplinary
Yuanxun Zhang, Jingwei Lu, Yuanyuan He
Summary: Partial-gravity experiments are crucial for research in space science and biology. This study proposes a cyclical simulation method for a partial-gravity environment and analyzes the variations of simulated gravity over time, establishing an evaluation mechanism. The results of the experiment provide technical support for future manned exploration on the Moon and Mars.
Article
Automation & Control Systems
Z. Lv, Y. Zhou, L. Zhan, Z. Zang, B. Zhou, S. Qin
Summary: The electric-assisted deep-drawn tests showed that introducing pulse current can improve the forming performance and deep-drawing deformation ability of high-strength steel without altering its microstructure, ultimately enhancing the mechanical properties of the workpiece.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Mechanics
Xiao-Yu Xu, Zheng Xu, Xiao-Dong Wang, Li-Ding Wang, Shao-Chun Qin, Jun-Shan Liu, Yu Yu
Summary: This study reports the breakup mechanism of a conical liquid bridge based on the electrostatic liquid loading method. The breakup criterion in terms of interface feature size is derived, and the mechanism is categorized as either spontaneous breakup or stretching breakup. The evolution of interface and velocity for the two breakup behaviors is investigated, and the effects of top radius and stretching velocity on remnant volume are examined.
Article
Biodiversity Conservation
Lukas F. Kuwaczka, Veronika Mitterwallner, Volker Audorff, Manuel J. Steinbauer
Summary: This review aims to outline the ecological impacts of conventional mountain biking and highlight potential differences and consequences arising with the use of electrically assisted mountain bikes (eMTBs). The results show that mountain biking can have immediate effects on animals, habitat use, reproductive success, seed dispersal, vegetation, and soil. The increasing use of eMTBs will lead to a larger frequency and spatial cover by bikers, resulting in more significant impacts on wildlife, vegetation, and soil.
GLOBAL ECOLOGY AND CONSERVATION
(2023)
Article
Thermodynamics
Yin Guan, Mengduo Wang, Shuang Wu, Jingwei Fu, Xiyang Chen
Summary: This paper investigates the spreading and sliding characteristics of a water droplet on an inclined hydrophobic surface, finding that the droplet exhibits different behaviors depending on the surface angle and Weber number. The maximum spreading diameter of the droplet increases significantly when the angle is larger than or equal to 60 degrees, and the instability disappears when the Weber number reaches 40. The results also reveal scaling relationships between the maximum spreading diameter and the normal Weber number, as well as the total sliding length and the tangential Weber number.
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2023)
Article
Multidisciplinary Sciences
Rasoul Daneshfaraz, Ehsan Aminvash, Mohammad Bagherzadeh, Amir Ghaderi, Alban Kuriqi, Amir Najibi, Ana M. Ricardo
Summary: The study found that using fishway elements can increase energy dissipation and improve hydraulic parameters of inclined drops, with an average of 88% increase in flow energy dissipation compared to simple drop structures. Among the experimental models, Model M7 with holes fish elements showed the highest energy dissipation, while Model M2 without holes fish elements had the highest flow aeration length and relative downstream water depth.
Article
Chemistry, Analytical
Yukihiro Yonemoto, Yosuke Fujii, Yoshiki Sugino, Tomoaki Kunugi
Summary: This study investigates the sliding behavior of water-ethanol mixture droplets on an inclined solid surface through experimental observation. The study finds that the size of the droplet affects its adhesion property, with larger droplets experiencing increased adhesion force while smaller droplets maintain a constant force. This difference is related to the degree of droplet shape deformation.
Article
Mechanics
Nang X. Ho, Truong V. Vu
Summary: The present paper reports numerical results on the solidification process of a hollow drop on an inclined surface. The drop undergoes deformation and forms an asymmetric tip as the surface angle increases. The solidification time, however, is not affected by the surface angle. The fluid accumulates at the bottom of the drop and the bubble moves upwards before being trapped by solidification. A larger bubble reduces the tip shift. The effect of Bond number and Stefan number on solidification is also considered.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Multidisciplinary Sciences
V. A. Herrero, H. Ferrari, R. Marino, A. Clausse
Summary: The experiment investigated the impact of four inclined cylindrical rods in a rectangular channel, by measuring pressure under different inclination angles. The data was analyzed using momentum conservation principles and semi-empirical methods to produce dimensionless groups of parameters relating pressure to characteristic dimensions of the rods.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Hao Wu, Ranabir Dey, Igor Siretanu, Dirk van den Ende, Lingling Shui, Guofu Zhou, Frieder Mugele
Article
Physics, Multidisciplinary
Hao Wu, Niels Mendel, Dirk van den Ende, Guofu Zhou, Frieder Mugele
PHYSICAL REVIEW LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Niels Mendel, Hao Wu, Frieder Mugele
Summary: A novel electric nanogenerator has been developed that converts the energy of moving drops into electrical signals through charge trapping technology, using a unique combination of stacked materials and charging methods to maintain stability in high temperatures, with potential for applications in energy harvesting and other fields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Harmen Hoek, Ranabir Dey, Frieder Mugele
Summary: The study shows that despite contact angle hysteresis and random drop coalescence events, the preferential drop positions closely follow numerically calculated local minima of electrostatic energy for variable drop size. This quantitative understanding provides important insights for improving heat transfer performance in various applications.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Sachin Nair, Jun Gao, Cees Otto, Michael H. G. Duits, Frieder Mugele
Summary: By using 3D Confocal Raman Microscopy, it was found that the surfactant layer is stable at high salinities, leading to preferential oil wetting. Upon reducing the ambient brine salinity, this layer decomposes and the surfaces become more water wet. The surfactant is found to partly dissolve in the oil and partly precipitate at the oil-water interface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Mechanical
Qierui Zhang, Frieder Mugele, Dirk van den Ende, Piet M. Lugt
Summary: The study found that the Washburn-like model based on the affinity of the oil for the grease matrix is applicable for greases made of various thickeners and base oils. This model can potentially be used for modeling the bleeding of stationary grease and monitoring the change in bleeding properties of greases in a bearing.
TRIBOLOGY TRANSACTIONS
(2021)
Article
Chemistry, Analytical
Sachin Nair, Jun Gao, Cees Otto, Michael H. G. Duits, Frieder Mugele
Summary: This study demonstrates the ultrasensitive detection of R6G molecules adsorbed from aqueous solutions using algorithm-improved confocal Raman microscopy and chemical enhancement by two-dimensional substrates. By developing a protocol for laser-induced reduction of graphene oxide and noninvasive Raman imaging, subnanomolar limits of detection were achieved on various substrates, allowing for the study of adsorption kinetics and imaging of spatial distribution. The findings suggest a strong potential for algorithm-improved graphene-enhanced Raman spectroscopy as a convenient method for detecting, imaging, and quantifying trace amounts of adsorbing molecules on different 2D substrates.
ANALYTICAL CHEMISTRY
(2021)
Article
Energy & Fuels
Duy Le-Anh, Ashit Rao, Stefan Schlautmann, Amy Z. Stetten, Subhash C. Ayirala, Mohammed B. Alotaibi, Michel H. G. Duits, Han Gardeniers, A. A. Yousef, Frieder Mugele
Summary: This study investigates the impact of fluid aging and temperature on the design of a successful microfluidic improved oil recovery (IOR) strategy. Laboratory experiments were performed using a glass 2.5D micromodel to simulate waterflooding processes at the pore scale. The results demonstrate the significance of fluid aging and temperature in achieving effective oil recovery.
Article
Chemistry, Physical
Niels Mendel, Diana Siretanu, Igor Siretanu, Derk W. F. Brilman, Frieder Mugele
Summary: The study found that appropriately sized interlayer cations can open up the interlayer space, making carbon dioxide easily accessible and achieving efficient adsorption under suitable conditions, confirming the potential of natural layered expandable clay minerals for gas separation or carbon sequestration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Aram Klaassen, Fei Liu, Frieder Mugele, Igor Siretanu
Summary: The balance between hydration and DLVO forces at solid-liquid interfaces controls many processes, with molecular scale hydration forces and surface charge density having largely independent origins. Oscillatory hydration forces were found to be largely independent of pH and salt concentration, and more pronounced on gibbsite surfaces due to the distribution of hydroxyl groups available for H bonding.
Article
Chemistry, Physical
Oezlem Kap, Simon Hartmann, Harmen Hoek, Sissi de Beer, Igor Siretanu, Uwe Thiele, Frieder Mugele
Summary: Polymer brush layers are responsive materials that swell in contact with solvents and their vapors. Experiments and calculations show that the dynamics of swelling in the brush layer are controlled by a combination of direct imbibition and vapor phase transport. A gradient dynamics model is developed to describe the observations and provide insights into the stabilization of non-equilibrium swelling profiles. The results emphasize the importance of vapor phase transport in wetting phenomena involving volatile liquids on functional surfaces.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Engineering, Chemical
Niels Mendel, Igor Siretanu, Frieder Mugele, Derk W. F. Wim Brilman
Summary: The study evaluated the separation efficiency of three montmorillonite-rich bentonite clay sorbents in biogas upgrading. The cation-exchanged clays showed good selectivity and fast regeneration, making them a promising alternative to traditional sorbents.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Igor Siretanu, Simone R. van Lin, Frieder Mugele
Summary: Researchers conducted a systematic study on hydration forces on mica surfaces and amorphous silica surfaces in aqueous electrolytes containing chloride salts. They found oscillatory and monotonically decaying hydration forces of similar strength on both surfaces, with a characteristic range of approximately 1 nm. The presence and disruption of force oscillations provide opportunities to probe water polarization.
FARADAY DISCUSSIONS
(2023)
Article
Multidisciplinary Sciences
Jianqiang Zhang, Xuejiao Wang, Zhaoyue Wang, Shangfa Pan, Bo Yi, Liqing Ai, Jun Gao, Frieder Mugele, Xi Yao
Summary: The study presents a programmable magnetic actuation method to manipulate droplets of various kinds using ferrofluid wetting ridges, which is crucial for biomedical and industrial applications such as processing and analyzing biological samples and collectively actuating micrometer-sized droplets.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Qierui Zhang, Frieder Mugele, Piet M. Lugt, Dirk van den Ende
