Article
Physics, Multidisciplinary
J. M. Sanchez Huerta, A. Ortiz Gomez
Summary: This study investigates the dynamics of fluid flow through non-rectilinear capillaries using theoretical and experimental approaches. Experimental validation of the theoretical model reveals the dependence of capillary geometry, viscosity, and surface tension on temperature effects. The theoretical and experimental results are well correlated.
Review
Chemistry, Physical
Jianchao Cai, Yin Chen, Yang Liu, Shuang Li, Chenhao Sun
Summary: This review critically summarizes the fundamentals and concepts of various capillary imbibition models within different geometries over the past 100 years. It discusses the applications of these models and proposes a universal model based on dynamic wetting conditions and equivalent cylindrical geometry. Future research is suggested to focus on analyzing corner flow dynamics, wetting fluid snap-off, capillary rise of non-Newtonian fluids, and employing accurate physical simulation methods for capillary-driven flow processes.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Mathematics, Applied
Lukasz Plociniczak, Mateusz Switala
Summary: The study conducted a rigorous mathematical analysis of oscillatory behavior in capillary flow, proposing an arbitrarily accurate regularization of the non-smooth component to prove various results about the dynamical behavior of the exact solution. The study found that the oscillatory behavior is independent of the chosen regularization, making the model robust. Additionally, Lyapunov stability analysis was applied to provide a comprehensive description of the asymptotic behavior of trajectories.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Review
Chemistry, Physical
Nikolai Kubochkin, Tatiana Gambaryan-Roisman
Summary: This review summarizes the progress in studying the wetting of corner-containing geometries, including isolated corners, rectangular channels, and confined angular geometries. It is believed to be of interest to readers from fields such as the oil and gas industry, space science, biophysics, and microfluidics.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2022)
Article
Engineering, Aerospace
M. N. Smirnova, V. F. Nikitin, E. I. Skryleva, Yu. G. Weisman
Summary: This paper presents experiments on capillary imbibition in microgravity conducted on a station in Earth orbit and during parabolic flights. The experiments involve repeated imbibition of an artificial porous medium and investigation of capillary driven seepage in soil. The paper describes the experimental setup, data analysis, and compares the numerical simulation results with experimental data.
Article
Environmental Sciences
Yang Liu, Steffen Berg, Yang Ju, Wei Wei, Jisheng Kou, Jianchao Cai
Summary: Imbibition in porous media is crucial in various engineering and industrial processes. This study examines the imbibition process in natural rocks at the pore scale, specifically under completely wetting and viscously unfavorable conditions. Numerical simulations reveal changes in flow characteristics, pore filling events, and morphology of the displacement front as the capillary number varies. Understanding these microscopic mechanisms is important for enhancing displacement efficiency and fluid connectivity.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Jianlin Zhao, Feifei Qin, Linlin Fei, Chaozhong Qin, Qinjun Kang, Dominique Derome, Jan Carmeliet
Summary: In this study, an advanced modified interacting capillary bundle model (MICBM) is developed to simulate imbibition dynamics in a strongly wetting square tube. The wetting corner film development is found to be less significant compared to the main meniscus flow under different conditions. Parameters such as viscosity ratio between wetting and non-wetting fluids, driving force, gravity, and contact angle are shown to influence the development of the corner film.
JOURNAL OF HYDROLOGY
(2022)
Article
Energy & Fuels
Zhenjie Zhang, Tianyi Zhao, Qingbang Meng
Summary: This paper establishes a capillary bundle model of counter-current imbibition and analyzes the characteristics of imbibition and the influences of capillary size and fluid viscosity.
Article
Environmental Sciences
Jianlin Zhao, Feifei Qin, Qinjun Kang, Chaozhong Qin, Dominique Derome, Jan Carmeliet
Summary: This study successfully simulates the dynamics of corner film flow in strongly wetting porous media using a modified interacting capillary bundle model (ICB) incorporated into a single-pressure dynamic pore network model (DPNM). The interaction between corner film and main meniscus flow in porous media is analyzed from a pore-scale perspective.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Jianlin Zhao, Feifei Qin, Robert Fischer, Qinjun Kang, Dominique Derome, Jan Carmeliet
Summary: With the modified interacting capillary bundle model, the dynamics of liquid imbibition in a square tube with corner films were accurately described, showing the universal scaling law for the main meniscus. This model is helpful in investigating the mechanisms during spontaneous imbibition and the impacts of various factors on imbibition dynamics.
WATER RESOURCES RESEARCH
(2021)
Article
Physics, Fluids & Plasmas
Jungtaek Kim, Yeonsu Jung, Ho-Young Kim
Summary: In this study, we quantitatively investigated the dynamics of liquid rise in vertically situated open microchannels and established a differential equation to describe its evolution. We found that there exists an optimal channel width that maximizes the equilibrium rise height.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Energy & Fuels
Rundong Gong, Xiukun Wang, Lei Li, Kaikai Li, Ran An, Chenggang Xian
Summary: This study investigates the effect of pore structure on spontaneous imbibition in variable-diameter capillaries. The research findings demonstrate that the variation in capillary diameter introduces additional resistance, causing the snap-off phenomenon and reducing the recovery efficiency of the non-wetting phase. The pore-throat ratio and tortuosity are identified as the main factors affecting this phenomenon.
Article
Engineering, Aerospace
V. F. Nikitin, E. I. Skryleva, Yu G. Weisman
Summary: In weightlessness, capillary forces are crucial for the flow of liquids, especially for processes like engine fuel supply, water supply to life support systems, and heat exchange. This paper focuses on the flow of liquids through porous media under the action of capillary forces in microgravity conditions. The hysteresis effect, which causes different flow patterns through dry and previously moistened media, is observed. Mathematical models are developed to predict these behaviors and can be validated through experiments on parabolic flights. Comparison between numerical modeling and experimental data helps choose empirical constants for predicting fluid behavior in Space vehicles' hydraulic loops.
Article
Physics, Multidisciplinary
Jack R. R. Panter, Andrew R. R. Konicek, Mark A. A. King, Arben Jusufi, Mohsen S. S. Yeganeh, Halim Kusumaatmaja
Summary: Capillary rise is a wetting phenomenon that plays a crucial role in various fields. This study focuses on the coupling between capillary rise and hemiwicking, and reveals the complexities of wetting and roughness. It shows that the critical contact angle for hemiwicking is separation-dependent and the rise heights and volumes differ between smooth and rough systems. The authors propose a Dual-Rise model to accurately predict these phenomena.
COMMUNICATIONS PHYSICS
(2023)
Article
Mathematics, Interdisciplinary Applications
Boqi Xiao, Qiwen Huang, Hanxin Chen, Xubing Chen, Gongbo Long
Summary: In this study, a fractal model for capillary flow through a single tortuous capillary with roughened surfaces in fibrous porous media was derived. The results of the model were found to be in agreement with existing models in the literature. It was observed that the imbibition height and mass of capillary rise decrease with increasing relative roughness, while the equilibrium time in the capillary decreases with increasing roughness. Additionally, the imbibition height and mass of capillary rise were found to increase with imbibition time.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2021)
Article
Thermodynamics
Malki Maliha, Bastian Stumpf, Felix Beyer, Marius Kuehnert, Heiko Kubach, Ilia Roisman, Jeanette Hussong, Thomas Koch
Summary: This work conducts highly resolved optical investigations on the fuel-oil-film-interaction to characterize secondary droplets in direct injected engines. The results suggest that the detachment of secondary droplets caused by fuel injection in direct injected engines may affect pre-ignition events.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Engineering, Environmental
M. Gloerfeld, M. Schremb, I. V. Roisman, J. Hussong, C. Tropea
Summary: The initial stage of solidification of a free supercooled water drop involves the formation of dendritic structures surrounded by liquid water. However, the impact dynamics and material properties of these partially frozen water drops have not been thoroughly studied. This study examines the kinematics of spreading and the geometry of the residual splat during the impact of dendritically frozen water drops. A theoretical model is then used to simulate the impact process, assuming plastic flow in the mushy drop. The model provides insights into the fluid flow near the impact axis and allows estimation of the apparent yield strength of the solid-liquid mixture for different initial temperatures.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Mechanics
Bastian Stumpf, Ilia V. V. Roisman, Alexander L. L. Yarin, Cameron Tropea
Summary: Drop impact on a liquid film results in a new mode of splash called simultaneous corona detachment, which is caused by the breakup of the wall film. The sudden displacement of the film leads to the thinning and rupture of the corona wall, triggering propagating rims that undercut and detach the entire corona. Experimental evidence and a proposed self-consistent theory support this mechanism.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Marija Gajevic Joksimovic, J. Benedikt Schmidt, Ilia V. Roisman, Cameron Tropea, Jeanette Hussong
Summary: The effect of graphite lubricant additives on the dynamics of drop impact on a heated surface has been studied. The addition of particles increases the drop residence time and lowers the rebound temperature, suppressing splash and preventing coalescence of bubbles.
Article
Engineering, Mechanical
Shubham Sharma, Saini Jatin Rao, Navin Kumar Chandra, Aloke Kumar, Saptarshi Basu, Cameron Tropea
Summary: The two-sensor depth from defocus technique is developed to achieve higher spatial and temporal resolution, improve estimates of spatial size distribution and number concentration, and provide guidelines for the calibration and design of optical systems. The technique and improvements are demonstrated in the case of secondary atomization with a shock wave and a single drop, where high-resolution number density and size distributions of secondary droplets are necessary.
EXPERIMENTS IN FLUIDS
(2023)
Article
Physics, Multidisciplinary
Marija Gajevic Joksimovic, Jeanette Hussong, Cameron Tropea, Ilia V. V. Roisman
Summary: Spray cooling is a method used in various industrial processes and for cooling of electrical devices. The process is influenced by hydrodynamic and thermodynamic processes, and becomes more challenging when dealing with multicomponent liquids. In this study, the impact of spray onto a heated substrate was visualized and the heat transfer was characterized. The presence of a small concentration of lubricant significantly increased the heat flux and shifted the Leidenfrost point.
FRONTIERS IN PHYSICS
(2023)
Review
Chemistry, Physical
Ilia Roisman, Mohammad Abboud, Philipp Brockmann, Fiona Berner, Ruediger Berger, Pauline Rothmann-Brumm, Hans Martin Sauer, Edgar Doersam, Jeanette Hussong
Summary: This study briefly reviews the flows accompanying the formation of liquid bridges, including the lifting of a Hele-Shaw cell, the stretching or shearing of a liquid bridge, and the liquid bridge flows observed during printing processes. Instabilities of liquid bridges lead to the formation of finger-like structures on the substrate or the appearance of cavities at the wetted region of the wall.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2023)
Article
Thermodynamics
Kilian Koebschall, Benjamin Traut, V. Ilia Roisman, Cameron Tropea, Jeanette Hussong
Summary: This study presents an experimental setup and a theoretical model for studying snowflake melting. The experimental results agree well with the model predictions, and an accurate value of the particle mass fractal dimension is required for accurately estimating the melting duration.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Mechanics
Niklas Apell, Cameron Tropea, Ilia V. Roisman, Jeanette Hussong
Summary: With the increasing economic importance of metal additive manufacturing by laser powder bed fusion, the demand for high-quality metal powders is also rising. However, the physics involved in supersonic close-coupled gas atomization, which is often used for producing these powders, are not well understood due to scarce experimental data, resulting in a lack of reliable predictive modeling capabilities.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Engineering, Mechanical
L. M. Reitter, Y. A. Malik, A. B. Jahn, I. V. Roisman, J. Hussong
Summary: This study characterizes the dynamic strength of wet granular ice layers through impact tests. The results reveal strong connections between ice particles in ice layers generated by ice crystal accretion. Comparable strength values can be obtained by reinforcing ice particle connections in ice layers prepared in the laboratory.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Thermodynamics
J. B. Schmidt, F. Tenzer, C. Tropea, J. Hussong, I. V. Roisman
Summary: Spray cooling is a technology that provides uniform and intense cooling for surfaces with complex geometry. It can be used in a wide range of surface temperatures for various applications. The performance of spray cooling depends on factors such as surface temperature, spray parameters, and the thermal properties of the liquid and substrate. This study focuses on the transitional boiling regime, which is the least studied due to its complexity. A model is developed to predict the heat flux during spray cooling in this regime and shows good agreement with experimental results.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
