Article
Computer Science, Interdisciplinary Applications
Ren-Peng Chen, Xue-Ying Liu, Wei Yang, Zhao Xia, Xin Kang, Anna Lushnikova
Summary: The wetting behavior of metakaolinite aluminum and silicon basal surfaces was studied using molecular dynamics simulations. It was found that dehydroxylation during calcination weakened the interlayer attraction, leading to particle breakup and increased specific surface area. The altered wettability was attributed to water-clay interactions mechanisms.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Multidisciplinary
Javad Ghorbani, Majidreza Nazem, Jayantha Kodikara, Peter Wriggers
Summary: By employing a mortar-type contact algorithm, a theoretical and numerical framework was developed for elastoplastic interaction of unsaturated granular soils with a rigid cylindrical object. The constitutive model based on the effective stress concept offers the ability to simulate the effect of stress-induced anisotropy on the plastic response, as demonstrated in several numerical examples for verification and sensitivity analysis.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Erli Ni, Tao Li, Ying Ruan, Yingjie Ma, Yifei Wang, Yanyan Jiang, Hui Li
Summary: The wetting performance of liquid metal gallium on organic liquid films was studied in this research. Organic liquid film was found to be able to change the wetting state of gallium droplets. By considering the solid substrate roughness and surface tension of the organic liquid, it is possible to predict the wetting state of the gallium droplet.
Article
Energy & Fuels
Leilei Si, Nan Ding, Jianping Wei, Lianchao Sheng, Lei Wang, Zhiwei Li, Xingming Chen
Summary: Investigation on coal-water contact angle and its microscopic wetting mechanism under different gas environments was conducted. The results showed that the contact angle gradually increased within a certain pressure range. The contact angle increased significantly in the CH4 atmosphere, transitioning the wettability from hydrophilic to hydrophobic. Molecular dynamics simulation revealed that the adsorption capacity of water molecules decreased with increasing gas pressure, resulting in the poor wetting of coal-water due to the gas adsorption layer and competitive adsorption.
Article
Chemistry, Multidisciplinary
Yuming Yin, Lingling Zhao, Shangchao Lin
Summary: Using molecular dynamics simulations, this study investigates the wetting characteristics of CO2 on smooth and rough surfaces. The results show that the contact angle of CO2 droplets decreases on smooth surfaces with increasing CO2-solid interaction energy, while it increases on rough surfaces with higher surface roughness. The study also uncovers the capillary drying-out phenomenon of CO2 molecules at the three-phase contact line of the droplets, which has been overlooked in previous theoretical studies.
Article
Mechanics
Yanling Chen, Liang Guo, Wanchen Sun, Ningning Cai, Yuying Yan
Summary: This study investigates the effects of surface wettability and rough structure on the wetting behavior of fuel droplets after hitting the walls using molecular dynamics method. The results show that a decrease in the solid-liquid interaction coefficient leads to an increase in the static contact angle and rough surface structures inhibit the spreading of the droplets. Additionally, specific boss-shaped structures enhance the surface oleophobicity.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Mathematics, Interdisciplinary Applications
Javad Ghorbani, Jayanta Kodikara
Summary: This paper outlines an extension of Biot's theory of dynamic wave propagation in fluid-saturated media, which can be used to model dynamic soil-structure interaction in frictionless conditions across different soil saturation levels. The analysis highlights the limitations of using saturation as Bishop's parameter in accurately modeling unsaturated soil behavior, especially as the soil becomes dry. A new definition of effective stress is proposed based on the analysis, along with recommendations for constitutive modeling. Additionally, a fully coupled finite element contact model is introduced, demonstrating its capability to control the vanishing capillary effect on soil-structure interaction as the soil dries.
COMPUTATIONAL MECHANICS
(2023)
Article
Soil Science
Yuqin Wu, Song Yang
Summary: In this study, a method that combines models of unsaturated soil with contact angle measurement methods is presented. The characteristics of soil contact angle were studied using the sessile drop method (SDM) and the direct observation method (DOB). The results showed significant differences between the CA values measured with SDM and DOB, as SDM measures the CA of a surface while DOB measures the CA between soil particles at a smaller scale.
SOIL & TILLAGE RESEARCH
(2023)
Article
Energy & Fuels
Hamid Esfandyari, Mohammad Sarmadivaleh, Feridun Esmaeilzadeh, Muhammad Ali, Stefan Iglauer, Alireza Keshavarz
Summary: Global energy demand is rising, and the disadvantages of extensive fossil fuel use are becoming more evident. Hydrogen (H-2) is considered a viable alternative energy source for industries. However, its compressibility and volatility pose challenges in transport and storage. This study evaluates the wettability and interfacial tension (IFT) of H-2 in different subsurface formations and fluid systems, and explores the impact of mineral composition on the storage capacity of H-2 in subsurface reservoirs. The results highlight the importance of mineral composition in determining wettability and IFT, and provide insights for estimating geo-storage capacity based on rock mineralogy.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Bruno Marco de Oliveira Silveira, Rafael dos Santos Gioria, Jhonatan Jair Arismendi Florez, Thais Bortotti Fagundes, Mayara Antunes da Trindade Silva, Rodrigo Skinner, Carina Ulsen, Cleyton de Carvalho Carneiro, Jean Vicente Ferrari
Summary: This study emphasizes the importance of oil reservoir wettability in the maintenance and restoration of rock surfaces. The cleaning process may lead to mischaracterization of the original wettability of surfaces, while high temperature and pressure conditions can increase the hydrophobicity of rock surfaces. Furthermore, temperature has a greater impact on contact angle values than pressure.
Article
Energy & Fuels
Kan -Yuan Shi, Jun-Qing Chen, Xiong-Qi Pang, Fu-Jie Jiang, Sha-Sha Hui, Zhen-Cheng Zhao, Di Chen, Qi Cong, Tong Wang, Hui-Yi Xiao, Xiao-Bin Yang, Yu-Ying Wang
Summary: The wetting behavior of water on different clay mineral surfaces at the nanoscale was studied using Molecular dynamics simulation. The wettability of clay minerals was found to follow the order: montmorillonite > chlorite > kaolinite > illite. Factors such as temperature, hydrocarbon type, and water mineralization were found to affect the wettability of clay minerals.
Article
Chemistry, Physical
Agnieszka Adamczuk, Angelika Gryta, Kamil Skic, Patrycja Boguta, Grzegorz Jozefaciuk
Summary: This study examined the effects of pure minerals on the water stability and wettability of artificial aggregates. Increasing mineral content increased the rate of aggregate destruction in water, except for aggregates composed of goethite. Aggregates with lower mineral proportions showed apparent hydrophobicity. Among all minerals, kaolinite had the greatest impact on water contact angle and water repellency.
Article
Chemistry, Physical
Youhua Jiang
Summary: This article introduces the research progress of droplet depinning on superhydrophobic surfaces and explores complex soft wetting. It focuses on the depinning process of droplets on soft surfaces and viscoelastic droplets on rigid surfaces, as well as the factors that affect the depinning of viscoelastic droplets on soft superhydrophobic surfaces.
SURFACE INNOVATIONS
(2022)
Article
Biochemical Research Methods
Peng Zhu, Davoud Dastan, Lin Liu, Lingkang Wu, Zhicheng Shi, Qian-Qian Chu, Faizah Altaf, Mustafa K. A. Mohammed
Summary: In this paper, the wettability of different phases of TiO2 thin films was studied using molecular-dynamics simulation. The results showed that the contact angle decreased with increasing interaction energy between water and the titanium dioxide interface. The structural connection and arrangement of surface microtopography directly affected the wettability.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2023)
Article
Chemistry, Multidisciplinary
Jinjian Hou, Chang Liu, Xiuling Yuan, Lihua Ma, Huizhe Yan, Hongwen Zhang, Yonghui Wang, Yufei Chen
Summary: This study investigated the influence of different ionic compositions in aqueous solution on the wettability of mineral surfaces. The results showed that the presence of SO42- increased the hydrophilicity of the mineral surfaces. Divalent ions had a greater impact on wettability alteration compared to monovalent ions, primarily due to their higher adsorption and greater effect on compressing the electric double layer. The study also found that the presence of asphaltenes and resins in heavy oils affected the contact angles of oil drops on mineral surfaces.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Mechanical
Chao Zhang, Ning Lu
JOURNAL OF ENGINEERING MECHANICS
(2020)
Article
Engineering, Geological
Chao Zhang, Ning Lu
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2020)
Editorial Material
Engineering, Mechanical
Chao Zhang, Ning Lu
JOURNAL OF ENGINEERING MECHANICS
(2021)
Article
Engineering, Geological
Chao Zhang, Ning Lu
Summary: The soil freezing curve (SFC) is a fundamental relationship between liquid water content and temperature under subzero conditions, impacting mechanical and hydrologic behavior of soil. The traditional paradigm based on capillary pressure has limitations, while a new paradigm based on soil sorptive potential (SSP) offers more accurate predictions of SFC, demonstrating practical significance in geotechnical engineering problems.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Yijie Wang, Liming Hu, Chao Zhang, Shengmin Luo, Ning Lu
Summary: The study introduces a new theory to explain the sharp drop in nitrogen sorption isotherms and quantifies the pressure distribution of liquid nitrogen at the molecular scale. A range of cavitation pressure is predicted using classical nucleation theory and the van der Waals equation of state, and cavitation is triggered when the global minimum liquid pressure of nitrogen falls within the cavitation threshold. Calculated minimum liquid pressure always occurs at 0.5 relative pressure, indicating the validity of the cavitation onset criterion.
JOURNAL OF ENGINEERING MECHANICS
(2021)
Article
Engineering, Geological
Chao Zhang, Shaojie Hu, Ning Lu
Summary: Soil's elastic modulus is a fundamental property that can be altered by water through adsorption and capillarity mechanisms. These mechanisms can be described by the proposed EMCC equation, and the relationship between this equation, soil shrinkage curves and suction stress can facilitate the prediction of soil's hydromechanical behavior.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Review
Environmental Sciences
Shengmin Luo, Ning Lu, Chao Zhang, William Likos
Summary: Soil water potential is a fundamental parameter for understanding various phenomena in the earth's shallow subsurface environment. However, a consensus definition is still lacking and some fundamental questions about the origins and mechanisms of soil water potential remain controversial and elusive.
VADOSE ZONE JOURNAL
(2022)
Article
Engineering, Geological
Lingyun Gou, Chao Zhang, Shaojie Hu, Renpeng Chen, Yi Dong
Summary: A theoretical framework for drying induced consolidation is developed, using the Richards equation to describe moisture flow and quantifying the impact of soil-water interaction on soil mechanical properties. The accuracy of the framework is verified by comparing with numerical solutions and experimental data.
Article
Engineering, Geological
Chao Zhang, Shaojie Hu, Zemin Qiu, Ning Lu
Summary: This study presents a new poroelasticity theory that incorporates both adsorption and capillarity as the soil-water interaction mechanisms. By considering factors such as interparticle attractive stress and adsorption-induced pore-water pressure, an effective stress equation for variably saturated soil is derived. Experimental validation demonstrates the validity and accuracy of the theory for a variety of soil materials.
Article
Environmental Sciences
Chao Zhang, Lingyun Gou, Shaojie Hu, Ning Lu
Summary: This study establishes a thermodynamic framework for soil-water interaction, which addresses long-lasting issues in soil properties and offers a theoretical basis to predict and explain abnormal soil behavior.
WATER RESOURCES RESEARCH
(2022)
Article
Chemistry, Analytical
Aynaz Biniyaz, Behnam Azmoon, Zhen Liu
Summary: This study investigates the intelligent control of groundwater in slopes using deep reinforcement learning (DRL). By training a DRL learning agent to regulate the flow rate of a pump, the aim is to keep the groundwater close to the target level and reduce the risk of slope failure. The results show that the geosystem integrated with DRL can dynamically adapt to diverse weather events and improve the control policy over time.
Article
Environmental Sciences
Shaojie Hu, Chao Zhang, Ning Lu
Summary: Soil matric potential and osmotic potential are considered as two independent components of total soil water potential, but laboratory observations suggest a potential coupling between them. This study develops a theoretical model based on the concept of soil sorptive potential to quantitatively explain this problem. The model shows that matric potential and osmotic potential are not independent and that increasing salt concentration can affect them differently in different suction ranges, leading to significant underestimation of soil hydraulic conductivity if the coupling effects are neglected.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Geological
Yuhao Ren, Chao Zhang, Minxiang Zhu, Renpeng Chen, Jianbo Wang
Summary: Ground loss, the excess volume of excavated soil, determines the boundary conditions and magnitude of tunneling-induced ground settlement. Despite its essential role, there is no universally agreed formulation for ground loss parameter. A comprehensive field database is utilized to evaluate existing formulations and develop a more accurate formulation using the random forest algorithm. The developed formulation improves settlement prediction, outperforming classical solutions and confirming its accuracy.
Article
Engineering, Geological
Lingyun Gou, Chao Zhang, Ning Lu, Shaojie Hu
Summary: A soil's hydraulic conductivity is a nonlinear function of water content, reflecting the microscopic soil properties of pore structure, pore connectivity, and mineral-water interaction. These properties are governed by two soil-water interaction mechanisms: adsorption and capillarity.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Behnam Azmoon, Aynaz Biniyaz, Zhen Liu
Summary: This study utilizes high-resolution and LiDAR-derived digital elevation models (DEMs) to detect and locate landslides, and proposes a semi-automatic method for obtaining landslide inventories. The performance and application value of the method are validated through comparisons with existing landslide inventories and reports, as well as validation results.
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhichao Zhang, Mingfei Feng, Guangshuo Zhou, Zhenglong Xu
Summary: A thermodynamic constitutive model for structured and destructured clays is proposed in this paper. The model includes state-dependent relations of hyperelasticity and plasticity without the concept of yielding surface. The proposed model captures the couplings between elasticity and plasticity and the effects of bonding structure.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shahab Amanat, Kourosh Gholami, Reza Rafiee-Dehkharghani, Dipanshu Bansal
Summary: This paper investigates the optimal design of wave barriers using the modified non-dominated sorting genetic algorithm-II (NSGA-II) and the Bloch-Floquet theory. The aim is to find the optimal design of plane wave barriers with a wide bandgap at a low-frequency range and low construction cost. The study develops a modified NSGA-II algorithm to determine the optimal arrangement of concrete in wave barrier unit cells. The performance of the optimal barriers is examined through finite element simulation and their efficacy in attenuating plane S-waves is verified.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yanlin Su, Guoqing Cai, Fengjie Yin, Yepeng Shan, Annan Zhou
Summary: This paper presents a novel elastic-viscoplastic constitutive model that takes into account particle breakage to reproduce the time-dependent behavior of coarse-grained soil. The model integrates the Unified Hardening (UH) model, the elastic-viscoplastic (EVP) model, and the overstress theory. The relationship between particle breakage and loading rate is established, and state variables associated with the critical state of coarse-grained soil are derived to consider both time and particle breakage. A three-dimensional elastic-viscoplastic constitutive model is constructed by combining a one-dimensional viscoplastic hardening parameter with a secondary consolidation coefficient considering particle breakage. The proposed model requires 19 parameters and effectively describes the influence of time-dependency and particle breakage on the shear, dilatancy, and compression behaviors of coarse-grained soil with different confining pressures or initial void ratios. Experimental data comparisons validate the model's ability to replicate the time-dependent behavior of coarse-grained soil.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shichao Zhang, Yaqiong Wang, Qidong Gao, Xiaobo Ma, Haixiao Zhou, Zhifeng Wang
Summary: Accurately evaluating and predicting ground settlement during tunnel excavation is essential for ensuring tunnel stability. This study conducted a probabilistic analysis of ground settlement under uncertain soil properties. The results demonstrate that spatially variable soils significantly influence the ground settlement in the vertical direction.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xu Zhang, Bin Luo, Youjun Xu, Zhiwen Yang
Summary: This paper presents an analytical solution for horizontal displacements induced by small radius curve shield tunneling. The formula is derived based on the image method and Mindlin solution, considering additional thrust, frictional resistance, ground loss, and grouting pressure. The solution is validated with on-site data, demonstrating its reliability and providing a new approach for predicting and controlling stratum horizontal displacements in curve shield tunneling. The study finds that ground loss has the most significant influence on displacements, and soil closer to the tunnel exhibits larger horizontal displacements.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jian-Hong Wan, Ali Zaoui
Summary: Ground vibrations during earthquakes can cause soil strength loss and structural damage. Rubber-soil mixtures (RSM) have shown promise in reducing residual ground deformation. This study used molecular dynamics simulations to investigate the friction behavior of the rubber-clay interface in RSM systems. The results revealed a direct correlation between normal stress and friction force, with denser soil systems exhibiting higher friction forces.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Hongying Wang, Qiang Zhang, Peinan Wu, Yanjing Li, Lijun Han, Guilei Han
Summary: In addition to the Mohr-Coulomb and Hoek-Brown criteria, other nonlinear functions are used to describe the plastic response of rock mass. This paper derived the equivalent cohesive strength, frictional angle, and dilatancy angle for nonlinear yield and plastic flow rock masses. The solution for a circular tunnel in any nonlinear yield and plastic flow rock masses was derived and verified using a numerical procedure. The analysis of strain-softening rock masses under two assumed nonlinear yield criteria was also studied.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhijun Wu, You Wu, Lei Weng, Mengyi Li, Zhiyang Wang, Zhaofei Chu
Summary: This study proposed a machine learning approach to predict the uniaxial compression strength (UCS) and elastic modulus (E) of rocks. By measuring meso-mechanical parameters and developing grain-based models, a database with 225 groups of data was established for prediction models. The optimized kernel ridge regression (KRR) and gaussian process regression (GPR) models achieved excellent performance in predicting UCS and E.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)
