Article
Construction & Building Technology
Linglin Li, Zhen Zhang, Zhongyuan Wang, Yichao Wu, Mansheng Dong, Yuqing Zhang
Summary: This study characterises the triple physics of thermal, hydraulic, and mechanical fields in saturated asphalt pavement under vehicle load. A thermo-hydro-mechanical model was proposed and validated for its effectiveness in predicting mechanical performance, temperature profile, and hydro-mechanical performance of asphalt pavement. Results show the importance of thermal deformation and thermoviscoelasticity, as well as the role of pore water in the pavement behavior under different conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Geological
Xin Cui, Louis Ngai Yuen Wong
Summary: Enhanced geothermal systems (EGS) are currently the most efficient method to extract heat from hot dry rock (HDR) reservoirs. This study developed a novel 3D thermo-hydro-mechanical coupling model to predict the long-term performance of EGS. The simulation results showed that while EGS maintains high productivity during early injection stages, it degrades rapidly once thermal drawdown occurs.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Xin Cui, Louis Ngai Yuen Wong
Summary: Thermo-hydro-mechanical (THM) coupling is prevalent in underground activities, and numerical simulation plays a crucial role in understanding THM coupling. The primary challenge lies in solving a system of partial differential equations (PDEs) with displacements, pore pressure, and temperature as the primary variables. Previous studies have mainly focused on UPT and U-PT schemes, with limited exploration of the promising UP-T scheme. Moreover, the performance of different solution schemes and stabilization of 3D simulations under advection-dominated heat transfer have not been adequately reported. This study introduces HENGYI, a new THM coupling simulator developed using the finite element method, which employs the robust UP-T scheme and the Streamline Upwind Petrov Galerkin method for advection-dominated heat transfer. The applicability of different solution schemes is found to be highly dependent on the degree of coupling between primary variables.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Tuan A. Pham, Gabriela M. Medero, Melis Sutman
Summary: This paper presents a thermohydro-mechanical coupled model of the elastic modulus characteristic curve (EMCC) based on the effective stress theories of unsaturated soils. The proposed model uses the soil-water characteristic curve (SWCC) and the modulus of elasticity under saturated conditions to predict the variation of modulus of elasticity with matric suction for unsaturated soils. The successful prediction performance of the proposed model is demonstrated by comparing measured and predicted outcomes for various published data sets related to different soil types.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Ocean
Bin Zhu, Songqing Yang, Lujun Wang, Deqiong Kong
Summary: The study aims to address the issues related to natural gas production from hydrates by developing a one-dimensional analytical model. Parametric studies show that simulations with different permeability levels all exhibit a continuous accumulating response of excess pore pressure during the production process.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Fujian Yang, Guiling Wang, Dawei Hu, Yanguang Liu, Hui Zhou, Xianfeng Tan
Summary: The study investigates the THM coupling parameters of granite treated with heating and water cooling, revealing a large number of cracks and establishing prediction models for THM coupling parameters.
Article
Engineering, Mechanical
Bingqian Yan, Hongpu Kang, Xiangshang Li, Qingjie Qi, Bo Zhang, Jianzhong Liu
Summary: The paper focuses on the damage evolution law and mechanical property weakening mechanism of jointed rock mass under hydro-mechanical coupling. The mineral composition of rock specimens was analyzed and the distribution law of nuclear magnetic resonance T2 spectrum of granite under different axial stress was studied. Furthermore, the mechanical properties of jointed rock samples under triaxial stress and seepage pressure were investigated.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Review
Construction & Building Technology
Peng Jing, Xintong Song, Jinxi Zhang, Hossein Nowamooz
Summary: This study investigates the characteristics of cement-treated materials and provides existing models to address various issues. Based on the literature study, a unified framework is proposed to describe the hydraulic and mechanical behaviors of cement-treated materials. Additionally, an empirical-analytical model is proposed to predict the unconfined compressive strength (UCS) value with curing time for cement-treated materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Yuwei Li, Jizhou Tang, Jun Zhang, Wanchun Zhao, Bo Liu, Yishan Pan
Summary: In this paper, a thermo-hydro-mechanical coupling model is established to study the influence of formation horizontal stress difference, approaching angle, and fracturing fluid injection temperature on CO2 fracturing. The results show that compared with hydraulic fracturing, CO2 fracturing can significantly reduce the fracture initiation pressure and time, and obtain a more complex fracture morphology. The approaching angle is linearly related to the initiation pressure and initiation time of opening new fractures.
Article
Thermodynamics
Shuyang Yu, Xuhua Ren, Jixun Zhang
Summary: This study introduced a fracture mark xi to reflect the active or failure mode of Smoothed Particle Hydrodynamics (SPH) particles, which can simulate rock progressive cracking characteristics. The solid-water interaction modes and the damaged particles - water particles transformation algorithms were embedded into traditional SPH program to simulate the water-stress coupling problems. The heat conduction equations were programmed into SPH to model the temperature-stress coupling problems.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Geological
Wu Liu, Jin Cheng, Huayan Yao, Liange Zheng, Qinghe Zhang, Zhenhua Zhang, Fan Yang
Summary: Under the thermodynamics framework, a thermo-hydro-mechanical coupling model was established for fractured rock mass considering both small-scale microcracks and large-scale fractures. The model takes into account the deformation evolution, permeability, and thermal conductivity variations caused by damage growth and frictional sliding. The model was validated using analytical solutions and laboratory compression test data, and it was applied to study the heat extraction responses of a three-dimensional enhanced geothermal reservoir.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Yue Cui, Nan Lin, Zhong Yuan, Huiqing Lan, Junqiang Wang, Huigang Wang
Summary: A thermo-hydro-mechanical coupling model for the FL gas pressure regulator is established and verified by engineering data. The effect of valve opening on the parameters of the regulator is studied, showing higher stress at specific locations under certain opening conditions. The regulator is optimized using the response surface method, resulting in optimal parameters and a maximum equivalent stress of 135.62 MPa.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Xin-Zhong Wang, Dong Wang, Zhe-Wei Wang, Xiao-Juan Yin, Xue-Jun Zhou, Ru Zhang, An-Lin Zhang, Gan Feng, Li Ren
Summary: The study showed that the elastic modulus and Poisson's ratio of granite change with increasing temperature, while the pore water pressure has a slight effect on the elastic modulus. During the thermo-hydro-mechanical coupling process, acoustic emission activity increases with temperature.
Article
Computer Science, Interdisciplinary Applications
Xiao-Ping Zhou, Er-Bao Du, Yun-Teng Wang
Summary: This paper proposes a thermo-hydro-chemo-mechanical coupling peridynamic model for fractured rock mass to simulate fluid-driven crack, water pressure, and temperature characteristics. The model is validated by comparing with analytical solutions and previous numerical results, and shows good agreement with results obtained by the phase field method. The model is also used to simulate geothermal extraction process and investigate water pressure and thermal field distribution.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Energy & Fuels
Xiaolin Huan, Gao Xu, Yi Zhang, Feng Sun, Shifeng Xue
Summary: This study reveals that in deep geothermal production, the coupling effects of heat transfer and fluid flow can lead to significant disturbance in effective stress and integrity of the wellbore structure, providing important insights for the stability control of geothermal wells.