Particle shape effect on thermal conductivity and shear wave velocity in sands

Lee, Changho; Suh, Hyoung Suk; Yoon, Bong June; Yun, Tae Sup

doi:10.1007/s11440-017-0524-6

Cited by 53 publications

(17 citation statements)

References 24 publications

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“…This finding is consistent with the observation from the work by Yun and Santamarina (2008) but inconsistent with the observation by Côté and Konrad (2005) who reported that the thermal conductivity of angular particles is higher than that of rounded particles at a given void ratio. Lee et al (2017) reported that the dependence of thermal conductivity on the void ratio for rounded particles is higher than that for angular particles, whereas J. Geotech. Geoenviron.…”

Section: Effect Of Particle Shape On Thermal Conductivity-void Ratio mentioning

confidence: 99%

“…The main reason behind the above differences may be the origin of the data. For example, the data for Yun and Santamarina (2008) include results for six sands tested using the same approach, the data in Côté and Konrad (2005) are from seven published papers, and the data for Lee et al (2017) include results for nine sands tested using the same approach. However, these three studies ignored some important factors between the sands included in the comparison, such as the particle mineralogy, mean particle size, and particle size distribution which can all affect the thermal conductivity of sands to some extent (Aduda 1996;Abuel-Naga and Bouazza 2013;Dong et al 2015;Zhang and Wang 2017;Xiao et al 2018).…”

Section: Effect Of Particle Shape On Thermal Conductivity-void Ratio mentioning

confidence: 99%

“…Although it would be logical that particle shape has an effect on the thermal conductivity, conflicting trends have been noted in the limited studies performed on this topic (Côté and Konrad 2005;Yun and Santamarina 2008;Gan et al 2017;Lee et al 2017;Fei et al 2019). Accordingly, the main purpose of this study is to perform thermal needle tests on mixtures of angular and rounded glass particles having different particle shapes under a range of relative densities.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity of Granular Soil Mixtures with Contrasting Particle Shapes

Xiao

Nan

et al. 2020

J. Geotech. Geoenviron. Eng.

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Particle shape is known to affect the mechanical behavior of sands as it influences packing density and particle contacts. Even though the thermal conductivity of sands also depends on packing density and particle contacts, the effects of particle shape on thermal conductivity are not well understood. A series of thermal needle tests were conducted on five granular soil mixtures with different proportions of rounded and angular glass particles having the same mineral composition and gradation. The maximum and minimum void ratios and the packing density of these mixtures were found to depend on the overall regularity, defined as the average value of the particle's aspect ratio, convexity and sphericity. For a given overall regularity, the thermal conductivity increases with decreasing void ratio or increasing relative density. Interestingly, the overall regularity has a small effect on the thermal conductivity at a given void ratio but has a significant effect on the thermal conductivity at a given relative density. A particle shape-dependent empirical equation is proposed to quantify the effects of relative density and overall regularity on the thermal conductivity of the tested sand.

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Section: Effect Of Particle Shape On Thermal Conductivity-void Ratio mentioning

confidence: 99%

Section: Effect Of Particle Shape On Thermal Conductivity-void Ratio mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity of Granular Soil Mixtures with Contrasting Particle Shapes

Xiao

Nan

et al. 2020

J. Geotech. Geoenviron. Eng.

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“…To quantify the particle shape, the shape parameter that is correlated to the thermophysical properties should be identified and evaluated. A recent study on sand investigated the correlation between several quantified shape parameters, such as elongation and sphericity, and geotechnical properties including thermal conductivity of sand specimens [56]. For nanofluids, however, it should be determined whether any of these shape parameters could be correlated to the relative thermal conductivity of the nanofluids.…”

Section: Identifying the Relevant Shape Factor For Thermal Conductmentioning

confidence: 99%

“…For nanofluids, however, it should be determined whether any of these shape parameters could be correlated to the relative thermal conductivity of the nanofluids. For example, the degree of resemblance of the particle to a sphere is known as sphericity but has different definitions in the literature [39,56,57]. In this study it is defined as the ratio of the diameter of the sphere that has the same surface area or volume as the particle (D eqs or D eqv ) to the diameter of the circumscribing sphere of the nanoparticle (D cs ).…”

Section: Identifying the Relevant Shape Factor For Thermal Conductmentioning

confidence: 99%

Particle-shape-, temperature-, and concentration-dependent thermal conductivity and viscosity of nanofluids

et al. 2019

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In this study, using the Green-Kubo-method-based molecular dynamics simulations, correlations for predicting the thermophysical properties of nanofluids are developed based on particle shape, fluid temperature, and volume concentration. Silver nanofluids with various nanoparticle shapes including spheres, cubes, cylinders, and rectangular prisms are investigated. The numerical study is conducted within the concentration range 0.14-1.4 vol % and temperature range 280-335 K. The relative thermal conductivity and relative viscosity predicated by the proposed correlations are within a mean deviation of 2% and 5%, respectively, as compared with the experimental results from this study and the available literature. The proposed correlation will be a useful tool for engineers in designing the nanofluids for different applications in industry.

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Multi‐phase‐field microporomechanics model for simulating ice‐lens growth in frozen soil

Suh

Sun

2022

Num Anal Meth Geomechanics

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This article presents a multi-phase-field poromechanics model that simulates the growth and thaw of ice lenses and the resultant frozen heave and thaw settlement in multi-constituent frozen soils. The growth of segregated ice inside the freezing-induced fracture is implicitly represented by the evolution of twophase fields that indicate the locations of segregated ice and the damaged zone, respectively. The evolution of two-phase fields is induced by their own driving forces that capture the physical mechanisms of ice and crack growths, respectively, while the phase-field governing equations are coupled with the balance laws such that the coupling among heat transfer, solid deformation, fluid diffusion, crack growth, and phase transition can be replicated numerically. Unlike phenomenological approaches that indirectly capture the freezing influence on the shear strength, the multiphase-field model introduces an immersed approach where both the homogeneous freezing and the ice-lens growth are distinctively captured by the freezing characteristic function and the driving force accordingly.Verification and validation examples are provided to demonstrate the capacities of the proposed models.

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Particle shape effect on thermal conductivity and shear wave velocity in sands

Cited by 53 publications

References 24 publications

Thermal Conductivity of Granular Soil Mixtures with Contrasting Particle Shapes

Thermal Conductivity of Granular Soil Mixtures with Contrasting Particle Shapes

Particle-shape-, temperature-, and concentration-dependent thermal conductivity and viscosity of nanofluids

Multi‐phase‐field microporomechanics model for simulating ice‐lens growth in frozen soil

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