Article
Thermodynamics
B. B. Kazemian, P. Cheng
Summary: A variable solid-fluid interaction strength scheme compatible with the lattice Boltzmann method is introduced to investigate contact angle hysteresis phenomena numerically. The method is demonstrated to accurately reproduce the observed behaviors during droplet sliding and evaporation processes, and the results are in agreement with previous experimental investigations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Elise Berut, Stephane Lips, Valerie Sartre, Frederic Lefevre
Summary: This paper investigates the influence of tube cross-section on the stability of a liquid plug. It finds that fluted and triangular shapes are the most promising for destabilizing the liquid plug, as they promote capillary drainage. Furthermore, the cross-section can affect stability through modification of menisci curvature or apparent contact angle hysteresis.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Abhinav Naga, Hans-Juergen Butt, Doris Vollmer
Summary: In this study, analytical expressions for the force required to detach a rotating spherical particle from a liquid-fluid interface were derived, with the theory predicting a reduction in detachment force due to rotation, particularly when there is contact angle hysteresis between the particle and the liquid.
Article
Multidisciplinary Sciences
Kaiqi Zhao, Lidong Sun
Summary: This study proposes a universal equation based on liquid mass to calculate the contact angle inside a capillary tube, and verifies its validity through experiments. The method is not affected by the transparency, wettability, or material of the capillary tube, providing a new and highly sensitive in situ method for evaluating capillary tubes. The study provides a theoretical basis for investigating heat and mass transfer under spatial limitation with well-defined surfaces in portable devices, flexible electronics, etc.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Chemistry, Multidisciplinary
Glen McHale, Nan Gao, Gary G. Wells, Hernan Barrio-Zhang, Rodrigo Ledesma-Aguilar
Summary: This study investigates the friction characteristics of liquid on solid surfaces, defines friction coefficients for droplets and contact lines, and analogizes them with Amontons' laws. By utilizing surface free energy considerations, it is found that the frictional force is directly proportional to the surface tension force. These findings have important implications for the design of superhydrophobic surfaces and the control of droplet motion.
Article
Energy & Fuels
Yin Gao, Keliu Wu, Zhangxing Chen, Tong Zhou, Jing Li, Dong Feng, Yanling Gao, Weibing Tian
Summary: This study investigates the impact of wetting hysteresis on fluid flow in shale oil reservoirs by establishing threshold pressure and flow resistance models. The results show that both threshold pressure and flow resistance increase with decreasing pore size, with flow resistance caused by dynamic wetting hysteresis being greater than threshold pressure caused by static wetting hysteresis.
Article
Engineering, Civil
Zeynep Karatza, Jim Buckman, Gabriela M. Medero, Christopher T. S. Beckett
Summary: Hydrophobic soils can create issues with rainwater infiltration, but can also improve stability in certain systems. Research shows that particle shape and surface roughness affect the formation and evolution of water meniscus structures, and that stable menisci can co-exist between hydrophobic particles.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Chemical
Qingjun Du, Peng Zhou, Yuping Pan, Xiao Qu, Lu Liu, Hui Yu, Jian Hou
Summary: Hydrophobicity and roughness of solid surfaces play crucial roles in determining wetting and flow behavior. Increasing roughness can enhance apparent hydrophilicity in some cases, while it may improve apparent hydrophobicity in others. Beyond the superhydrophobic boundary, the effect of roughness on apparent hydrophobicity weakens or disappears.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kira Lewis, Takeshi Matsuura
Summary: This paper extends a previous study by demonstrating the applicability of the method for predicting meniscus shape in different scenarios, such as on a tilted plate, between two plates, and for a sessile drop. The proposed Bezier curve method simplifies the computation process compared to previous approaches and can be applied to solve other differential equations. The study also found that a higher degree Bezier curve is required for predicting the shape of a sessile drop compared to other scenarios.
Article
Thermodynamics
Pouya Sharbati, Abdolali K. Sadaghiani, Ali Kosar
Summary: This study investigates the influence of contact angle (CA) and contact angle hysteresis (CAH) on humid air condensation and reveals their different roles in different stages of the condensation cycle. The findings show that increasing CAH has a negative effect on condensation heat transfer, while the impact of changing CA varies. Lower CAH values have a greater impact on enhancing condensation heat transfer, and increasing CAH has a more significant effect on hydrophobic surfaces than on hydrophilic surfaces. Additionally, decreasing CAH has a more pronounced effect on improving condensation heat transfer than increasing CA.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Engineering, Chemical
Facheng Chen, Jiejin Cai, Nikolaos T. Chamakos, Athanasios G. Papathanasiou, Ziqi Gong, Qiong Li
Summary: A liquid-solid interaction-based mesh model is used to analyze droplet evaporation on tilted surfaces, considering factors such as droplet morphology, contact angle hysteresis, evaporative cooling, vapor diffusion, and natural convection. Comparison with experiments confirms the model's accuracy. Tilt angle affects Marangoni flow within the droplet, resulting in significant changes in heat and evaporation fluxes. Adjusting the inclination can control natural convection direction and droplet evaporation pattern, thus influencing the evaporation rate.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Bisweswar Ghosh, Hadi Belhaj, Huda Alhashmi, Francis Idachaba, Parth Joshi, Md. Motiur Rahman, Mohammed Haroun
Summary: This study presents a quick, easy, and low-cost method to measure the wettability of a reservoir using the adherence tendency of rock particles. The optimum particle size for sustained floatation and balancing the buoyancy and gravity effect is determined. The floating particle method has advantages over established methods and can provide reliable wettability information from drill cuttings and core fragments.
Article
Chemistry, Multidisciplinary
Xudong Chen, Quanzi Yuan
Summary: Capillary adhesion in micro-nano technology is significantly influential and can be weakened or eliminated by optimizing shapes through dissolution. This study demonstrates that dissolution optimizes the adhesion force and sculpts unique geometrical shapes that effectively eliminate capillary adhesion. The mechanism of elimination is related to the stability of menisci around the optimized shapes, and the surface roughness of soluble fibers highlights the role of contact angle hysteresis (CAH) in the process. This research provides a promising approach to eliminate capillary adhesion by designing geometrical shapes.
ADVANCED MATERIALS INTERFACES
(2023)
Editorial Material
Chemistry, Multidisciplinary
Shuai Li, Hans-Juergen Butt
Summary: Fast removal of water drops from solid surfaces is important in many applications. The reduction in lateral adhesion of water drops on PDMS brush surfaces after exposure to various organic vapors was reported and attributed to the physisorption of vapor and swelling of the PDMS brushes. Contact angles of water drops on three hydrophobic surfaces in different vapors are measured to determine the contribution of vapor adsorption and change in interfacial tensions on drop adhesion. The findings show that vapor-induced change in interfacial tensions can explain the decrease in contact angles, while vapor adsorption into PDMS surfaces forms a lubricating layer, reducing contact angle hysteresis.
ADVANCED MATERIALS
(2023)
Article
Engineering, Mechanical
Raphael Kriegl, Alexander Kovalev, Mikhail Shamonin, Stanislav Gorb
Summary: The advancing and receding contact angles of water on soft magnetoactive elastomer films are significantly affected by the applied magnetic field. The difference between these angles, known as the contact angle hysteresis, is examined. The roles of filler concentration and material softness are elaborated. The results show promise for the development of smart surfaces for controlling dynamic wetting.
EXTREME MECHANICS LETTERS
(2023)