Numerical and Experimental Study of Coupled Seepage and Heat Transfer in Soil Medium

Bui, Quang Cuong; Zhou, Yihong; Zhao, Chunju; Nguyen, Canh Thai

doi:10.1007/s10706-019-00957-3

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…The relation of thermal velocity with the seepage propagation can be used to estimate the seepage velocity within the soil subjected to the seepage flow (Johansson, 1997;Perzlmaier et al, 2007). Bui et al (2019) used the numerical modeling with FEFLOW, together with the physical modeling of coupled seepage and thermal transportation in soil, to show that temperature measurement is a good parameter for estimating the seepage velocity.…”

Section: Resultsmentioning

confidence: 99%

“…However, for the real structures, anisotropy plays an important role and should be considered in the analysis. The FEFLOW program has been already employed by Bui et al (2019) in a coupled seepage and heat transfer study within a laboratory model. In this paper, we employed FEFLOW for the numerical simulation of heat transfer by seepage considering the uncertainties and possible errors in the determination of the saturated hydraulic conductivity and porosity of the used sand.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity

et al. 2021

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Heat transfer within the soil is a complex process in the presence of seepage flow. In such conditions, the soil’s thermal behavior is influenced by the thermal and hydraulic properties of the medium as well as the initial conditions and boundary conditions to which the medium is subjected. This paper presents the experimental and numerical studies of heat transfer within the sand subjected to the seepage flow. It focuses on the influence of saturated hydraulic conductivity and the porosity of medium on the heat transfer process. The temperature distribution within the sand was monitored by the optical fiber Distributed Temperature Sensor (DTS). The experiment was performed on three types of silica-dominated sands with different saturated hydraulic conductivities and different Soil Water Characteristic Curve (SWCC). In addition to the experimental study, a coupled hydrothermal numerical model was designed in FEFLOW software and validated by comparing its results with the experimental measurements. To determine the influence of porosity and saturated hydraulic conductivity on heat transfer, we analyzed the numerical models for different values of porosity and saturated hydraulic conductivity. The numerical and experimental studies showed that the thermal velocity is higher in sand with higher saturated hydraulic conductivity and temperature declination occurs more quickly due to the heat convection process. Saturated sand with larger porosity has an overall higher heat capacity, wherefore the temperature declination started later in the measuring points but dropped down lower close to the temperature of the upstream water.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity

et al. 2021

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“…We performed numerical simulations to analyse the variation of temperature field, water field and stress field of the loess slope soil under FT action, as well as the influence of multi-field coupling on slope stability. In this study, the numerical calculation model was constructed using the coefficient form partial differential equation (PDE) interface and solid mechanics interface of COMSOL Multiphysics simulation software (Bai et al, 2015;Lai et al, 2014;Qin et al, 2022). The stability analysis of soil slope affected by multi-field coupling under FT cycles was then discussed.…”

Section: Numerical Studiesmentioning

confidence: 99%

“…To describe the unfrozen water content in the soil during the FT process, the solid-to-liquid ratio is used to characterize the relationship between the unfrozen water content and the temperature change in the frozen soil (Bai et al, 2015), which is defined as follows:…”

Section: Water Migrationmentioning

confidence: 99%

Study on thermal‐hydro‐mechanical coupling and stability evolution of loess slope during freeze–thaw process

Qin,

Li,

Yang

et al. 2024

Earth Surf Processes Landf

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Disasters occurring at loess slopes in seasonal frozen regions are closely related to changes in the thermo‐hydro‐mechanical (THM) state in loess by freeze–thaw (FT) action. Current research on FT‐induced soil slope failure focuses on frozen stagnant water effects, while the intrinsic connection between the FT‐induced stagnant water effect and soil strength deterioration remains unclear. In this study, by taking the FT‐induced loess slope failure as an example, field surveys, boreholes, exploratory wells, and 3D topographic mapping were used to reveal the landslide features and stratigraphic information; Furthermore, the temporal and spatial variation of water and heat in loess slope was revealed by on‐site monitoring data; A THM coupled model of frozen soil was established using COMSOL Multiphysics simulation software to reconstruct the frozen stagnant water process of shallow loess slope, as well as the influence of THM field on loess landslide. The results show that the effects of FT in the seasonally frozen region occurred in the shallow layer of the loess slope. The water‐ice phase transition during FT process broke the phase equilibrium of loess. Numerical calculations and field monitoring indicated a continuous migration of water to the freezing front, creating a water‐enriched zone inside the loess. Both the impact of the frozen stagnant water and changes in the stress field led to the degradation of loess structure and reduced the strength properties, thus threatening the stability of the loess slope. The study results can contribute to an in‐depth understanding of the mechanism underlying FT loess landslides in seasonal frozen regions, and provide a scientific basis for the evaluation and prevention of FT landslides.

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Monitoring heat transfer for seepage in earth-rock dams with clay cores considering damaged areas: Laboratory experiments and numerical modeling

Ma,

Ren,

Zhang

et al. 2023

Computers and Geotechnics

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Numerical and Experimental Study of Coupled Seepage and Heat Transfer in Soil Medium

Cited by 5 publications

References 17 publications

Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity

Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity

Study on thermal‐hydro‐mechanical coupling and stability evolution of loess slope during freeze–thaw process

Monitoring heat transfer for seepage in earth-rock dams with clay cores considering damaged areas: Laboratory experiments and numerical modeling

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