Article
Water Resources
Xiang Huang, David L. Rudolph
Summary: This study presents a fully coupled thermal-hydraulic-mechanical model for variably saturated freezing soil, examining processes such as heat conduction, phase change, water movement, and ice lens development. The model's mechanisms were verified through laboratory experiments and parametric analyses, showing good agreement with literature data. Sensitivity analysis indicated that thermally-induced cryosuction is the main driver for water migration, while ice lens expansion causes consolidation and pore reduction in the unfrozen zone.
ADVANCES IN WATER RESOURCES
(2021)
Article
Engineering, Geological
Hao Fu, Erxiang Song, Rui Tong
Summary: In this paper, a numerical model considering fully thermo-hydro-mechanical (THM) coupling is proposed to study the characteristics of frost heave and calculate the frost heave amount and frost heave pressure. The model takes into account the complex interactions among water flow, heat transfer, stress equilibrium, phase change, and ice segregation. Simulation tests on frost heave amount and frost heave pressure validate the reliability of the proposed model.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Engineering, Civil
Jinglong Jia, Keguo Sun, Yong Wei, Zhi Xiong, Qian Huang, Jinhang Qin
Summary: This study focuses on the calculation and prediction of frost heaving stress in tunnels. Unidirectional freezing experiments were conducted on sandstone, and a thermal-hydro-mechanical (THM) coupling model was developed to perform numerical calculations. The results show that the model accurately describes the frost heaving mechanism of rocks, and a prediction function (y = AxeBx) can accurately predict the maximum frost heaving stress.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Engineering, Environmental
Yukun Ji, Guoqing Zhou, Veerle Vandeginste, Yang Zhou
Summary: Through the study of multiphase interactions and coupled THM mechanism, an intermittent freezing model has been established to effectively alleviate soil frost heave. The research suggests that the slower growth of ice lens due to the movement of the freezing front is the main reason for frost heave mitigation.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jinfeng Li, Antai Dong, Jidong Teng, Hongye Yan, Sheng Zhang
Summary: This study focuses on the migration of vapor from a mesoscale point of view and proposes a new criterion for ice lens initiation, providing a theoretical basis for understanding frost heave in coarse-grained soils. The influence of overburden pressure and temperature gradient on the heaving rate is also discussed.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Geological
Hao Gao, Seyed Ali Ghoreishian Amiri, Signe Kjelstrup, Gustav Grimstad, Benoit Loranger, Elena Scibilia
Summary: This paper presents a fully coupled thermo-hydro-mechanical model to simulate frost heave in fully saturated soils. The model accurately simulates the formation and growth of ice lenses and avoids the need for parameterization by using measurable physical properties.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Engineering, Geological
K. Niggemann, R. Fuentes
Summary: The calculation of frost heaving with ice lens formation is still not standardized for construction projects using artificial ground freezing (AGF). This paper presents a new semi-analytical approach to accurately simulate the complex processes of ice lens formation and validates its effectiveness through experiments.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Hanqing Chen, Xin Li, Hao Xiong, Xiangsheng Chen, Dong Su
Summary: In order to understand the inhibition mechanism of overburden pressure on water migration in freezing soil, this study analyzed the pressure-suction coexistence state of film water and found that ice pressure offsets and balances theoretical suction, resulting in a surface adsorption force that drives water migration. Based on this, a mechanical model of the pressure-suction coexistence state was introduced into the frozen fringe theory, revealing that as the overburden pressure increases, the surface adsorption force increases while the total permeability coefficient of the frozen fringe decreases. A theoretical model of segregation frost heave under pressure was established and an explicit equation for water migration velocity was derived. Experimental results from a frost heave loading test on saturated silt under open-system conditions confirmed the accuracy of the model. In summary, the proposed model has significant theoretical and practical significance for improving the existing frost heave theory.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiaodong Zhao, Ting Li, Yukun Ji, Haihang Wang
Summary: The study revealed that ice lens-dependent frost heave in 2D freezing accounted for less than 75% of that in 1D freezing due to strong interactions between the frozen zone, the unfrozen zone, and neighboring constraints.
JOURNAL OF COLD REGIONS ENGINEERING
(2021)
Article
Engineering, Geological
S. Kjelstrup, S. A. Ghoreishian Amiri, B. Loranger, H. Gao, G. Grimstad
Summary: This paper uses non-equilibrium thermodynamics to describe the transport of sub-cooled water across a partially frozen soil matrix caused by a temperature difference. A set of coupled transport equations of heat and mass is presented, along with the prediction of the maximum frost heave pressure. The definition and experimental determination of the transport coefficients are extensively discussed, leading to reasonable agreement with numerical and experimental results.
Article
Engineering, Civil
Xiaolin Weng, Yufeng Sun, Zhuang Yang, Deng Wang, Hangfei Yu
Summary: This study presents an improved mathematical model of coupled water, heat, and stress for saturated freezing soil, considering the elastic-viscoplastic behavior of the soil, solid-fluid interface energy, and liquid-crystal equilibrium condition. The model was validated through numerical simulations and comparison with a reference model.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Jidong Teng, Haosong He, Xuemao Feng, Hongye Yan, Sheng Zhang
Summary: This study proposes a new criterion for assessing frost heave susceptibility of subgrade fillings in cold regions based on an analytical solution. Experiments validate the proposed model, showing good agreement between computed and measured values of frost heave. The new index, named slope R, classifies frost heave susceptibility based on a proportional function of time, with clear theoretical basis and easily obtainable parameters.
Article
Thermodynamics
Yiran Hu, Ziyi Fu, Xiaodan Hou, Yaning Zhang, Zheng Wang, Bingxi Li
Summary: This study investigated the heat and water transfers for the frost heave behavior of freezing graded soil under the influence of fine content, cooling temperature, and water supply. The results showed that the main source of frost heave was the external water supply, and higher fine content and lower cooling temperature resulted in higher frost heave and more water intake. The thickness of visible ice lenses was proportional to the frost heave, while invisible ice lenses played a bigger role in the frost heave. The theoretical predictions of frost heave based on the modified formula showed good agreement with the experimental results, with a relative error of 2.7%.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Geological
A. H. Sweidan, K. Niggemann, Y. Heider, M. Ziegler, B. Markert
Summary: This research work presents an experimental and numerical study of the coupled thermo-hydro-mechanical (THM) processes that occur during soil freezing. The study distinguishes between two thermal states, focusing on thermal transient state and (quasi-) steady state. A numerical model based on continuum mechanical theory and phase-field modeling is proposed, showing capability in describing the freezing of saturated soils.
Article
Thermodynamics
Jun Bi, Zhijian Wu, Yingmin Zhang, Haiyan Wen, Yunxia Shen, Sheng Yang, Tao Zhao
Summary: In this study, an analytical model was proposed to estimate the thermal conductivity of freezing soils (lambda) based on heat conduction theory and a simplified microstructure, considering the variations in phases and frost heave at different subzero temperatures. The model takes into account the void ratio, initial volumetric water content and subzero temperature, and a flow chart was designed for the calculation process. Experimental results showed good agreement between the calculated and measured lambda values, indicating that the model accurately captures the variation in lambda with subzero temperature. Moreover, the new model outperformed the other 5 thermal conductivity models under positive temperatures.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Shuangyang Li, Mingyi Zhang, Wansheng Pei, Yuanming Lai
APPLIED THERMAL ENGINEERING
(2018)
Article
Engineering, Environmental
Shuangyang Li, Mingyi Zhang, Wansheng Pei, Yuanming Lai, Wenbing Yu
COLD REGIONS SCIENCE AND TECHNOLOGY
(2018)
Article
Energy & Fuels
Wansheng Pei, Mingyi Zhang, Zhongrui Yan, Shuangyang Li, Yuanming Lai
Article
Engineering, Civil
Jianguo Lu, Wansheng Pei, Xiyin Zhang, Jun Bi, Tao Zhao
JOURNAL OF HYDROLOGY
(2019)
Article
Thermodynamics
Wansheng Pei, Mingyi Zhang, Yuanming Lai, Zhongrui Yan, Shuangyang Li
Article
Energy & Fuels
Zhongrui Yan, Mingyi Zhang, Wansheng Pei, Dongwei Li, Ji Chen, Yuanming Lai
Article
Engineering, Geological
Chong Wang, Wansheng Pei, Mingyi Zhang, Yuanming Lai, Jinpeng Dai
Summary: The repeated wetting-drying (WD) cycles result in the widening of pores in sandstone, forming low-density areas and increasing density dispersion, weakening physical and mechanical properties. The P-wave velocity decreases faster than the S-wave velocity, especially in the first 5 cycles. Exponential equations are established to describe the deterioration of mechanical characteristics with the number of WD cycles.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Energy & Fuels
Zhilang You, Mingyi Zhang, Jiwei Wang, Wansheng Pei, Guanji Li
Summary: This study investigated the optical and thermal properties of reflective coatings consisting of multiple pigments by preparing 12 types of epoxy-based blending coatings. The results showed that CuO and TiO2 blending coatings are near-infrared reflective coatings with cooling performances, and the increase of TiO2 nanoparticles can slightly increase the spectral reflectance of the coatings.
Article
Energy & Fuels
Wansheng Pei, Mingyi Zhang, Xusheng Wan, Ying Lai, Chong Wang
Summary: This study evaluated the influence of installing position of L-shaped TPCTs on spatial heat control in embankments. Results showed that the position can affect the work performance of the TPCTs, with different outcomes for shoulders, slopes, and toes installations. The study suggests that careful consideration should be given to the installing position of L-shaped TPCTs in permafrost regions to enhance their control performance.
Article
Soil Science
Feng Ming, Wansheng Pei, Mingyi Zhang, Lei Chen
Summary: In this study, a novel prediction model for hydraulic conductivity of frozen soil was proposed based on the capillary flow theory. The model takes into account both capillary flow and water film flow, providing more accurate evaluation of water migration in frozen soils. The model parameters can be easily obtained from laboratory tests and the predicted results showed good agreement with tested hydraulic conductivity.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Engineering, Geological
Jiazuo Zhou, Wansheng Pei, Xiyin Zhang, Wanlin Liu, Changfu Wei
Summary: This study introduced an easy freezing ring test to assess frost susceptibility of soil, which showed differences in water migration and frost heave capabilities among different soil types and were influenced by initial water content and salt concentration. The freezing ring test is easy and time-saving, making it suitable for large engineering projects.
Article
Chemistry, Multidisciplinary
Jie Zhou, Zeyao Li, Wansheng Pei
Summary: This study investigates the impact of freeze-thaw action on the particle characteristics of silt through experiments and tests. The results show that freeze-thaw action can cause particle breakage and clay particle aggregation, but the impact decreases with an increase in freeze-thaw cycles. Additionally, the effective confining pressure, freezing temperature, compaction degree, and fine content can all aggravate the effects of freeze-thaw action on silt particles. Based on particle interaction, two characteristic evolution modes of particle structure under freeze-thaw cycles have been inferred.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Jie Zhou, Zhongqiu Guo, Chuanhe Wang, Zeyao Li, Huade Zhou, Wansheng Pei
Summary: This paper studied the frost-thaw characteristics of soft clay during AFG under the construction of combined formation seepage through model tests. The micro characteristics of melted soil were analyzed using CT and a method to calculate freeze-thaw settlement was proposed.
APPLIED SCIENCES-BASEL
(2022)
Article
Astronomy & Astrophysics
Yan RongTao, Mu ChunMei, Zhang Qin, Tian HuiHui, Zhou JiaZuo, Wei ChangFu
SCIENTIA SINICA-PHYSICA MECHANICA & ASTRONOMICA
(2019)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
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
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
