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Journal articles on the topic 'Representative elementary volumes'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Lukas, M. Keller. "On the representative elementary volumes of clay rocks at the mesoscale." Journal of Geology and Mining Research 7, no. 6 (2015): 58–64. http://dx.doi.org/10.5897/jgmr2015.0224.

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2

Yoon, Hongkyu, and Thomas A. Dewers. "Nanopore structures, statistically representative elementary volumes, and transport properties of chalk." Geophysical Research Letters 40, no. 16 (2013): 4294–98. http://dx.doi.org/10.1002/grl.50803.

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3

Montagne, David, Isabelle Cousin, Lydie Le Forestier, Joël Daroussi, and Sophie Cornu. "Quantification of soil volumes in the Eg & Bt-horizon of an Albeluvisol using image analysis." Canadian Journal of Soil Science 87, no. 1 (2007): 51–59. http://dx.doi.org/10.4141/s05-029.

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In this study, we provide a strategy to quantify the effects on soil evolution of driving forces such as human activities or global change. This strategy was developed for situations in which soil evolution resulted in the formation of a complex juxtaposition of soil volumes with distinct properties including soil colours. It is based on image analysis. Our approach proceeds in two steps: (1) to find the minimum sample size over which the soil anisotropy can be neglected and (2) to define a Representative Elementary Volume (REV) of that sample. This approach was developed on the Eg & Bt ho

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4

Ukrainczyk, N., and E. A. B. Koenders. "Representative elementary volumes for 3D modeling of mass transport in cementitious materials." Modelling and Simulation in Materials Science and Engineering 22, no. 3 (2014): 035001. http://dx.doi.org/10.1088/0965-0393/22/3/035001.

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5

Milani, Marco, J. Germán Rubino, Tobias M. Müller, Beatriz Quintal, Eva Caspari, and Klaus Holliger. "Representative elementary volumes for evaluating effective seismic properties of heterogeneous poroelastic media." GEOPHYSICS 81, no. 2 (2016): D21—D33. http://dx.doi.org/10.1190/geo-2015-0173.1.

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6

Milani, Marco, J. Germán Rubino, Tobias M. Müller, Beatriz Quintal, Eva Caspari, and Klaus Holliger. "Representative elementary volumes for evaluating effective seismic properties of heterogeneous poroelastic media." GEOPHYSICS 81, no. 2 (2016): D169—D181. http://dx.doi.org/10.1190/geo2015-0173.1.

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Understanding and quantifying seismic energy dissipation in fluid-saturated porous rocks is of considerable interest because it offers the perspective of extracting information with regard to the elastic and hydraulic rock properties. An important, if not dominant, attenuation mechanism prevailing in the seismic frequency band is wave-induced fluid pressure diffusion in response to the contrasts in elastic stiffness in the mesoscopic-scale range. An effective way to estimate seismic velocity dispersion and attenuation related to this phenomenon is through the application of numerical upscaling

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7

Teruel, Federico E., and Rizwan-uddin. "Numerical computation of macroscopic turbulence quantities in representative elementary volumes of the porous medium." International Journal of Heat and Mass Transfer 53, no. 23-24 (2010): 5190–98. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2010.07.041.

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8

Bruns, S., S. L. S. Stipp, and H. O. Sørensen. "Statistical representative elementary volumes of porous media determined using greyscale analysis of 3D tomograms." Advances in Water Resources 107 (September 2017): 32–42. http://dx.doi.org/10.1016/j.advwatres.2017.06.002.

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9

Khassanov, Damir I., and Marat A. Lonshakov. "The investigation of the scale effect on porosity in Bashkirian limestones." Izvestiya of Saratov University. New Series. Series: Earth Sciences 21, no. 2 (2021): 137–47. http://dx.doi.org/10.18500/1819-7663-2021-21-2-137-147.

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The article presents the methodology of the representative elementary volume definition for two 1 m long whole core segments. Scientific articles focused on practical methods of representative volume calculations using various physical parameter fluctuations have been studied. Porosity values of every whole core fragment evaluated in two ways using the 7.3 cm diameter core samples in the first approach and the 3 cm diameter core samples in the second one have been compared. Particularities of the scale effect occurring in core samples and depending on core size and porosity type have been anal

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10

Hendrick, A. G., R. G. Erdmann, and M. R. Goodman. "Practical Considerations for Selection of Representative Elementary Volumes for Fluid Permeability in Fibrous Porous Media." Transport in Porous Media 95, no. 2 (2012): 389–405. http://dx.doi.org/10.1007/s11242-012-0051-8.

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11

Godwal, U., S. Bhagavath, B. Ghaffari, M. Li, P. D. Lee, and S. Karagadde. "Numerical modelling of porosity with combined gas and shrinkage effects in HPDC." IOP Conference Series: Materials Science and Engineering 1274, no. 1 (2023): 012028. http://dx.doi.org/10.1088/1757-899x/1274/1/012028.

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Abstract High-pressure die casting is a manufacturing process in which near-net-shape components are produced rapidly under a pressurized environment. However, due to the relatively higher cooling rate prevailing during the process, isolated liquid pockets form at certain locations, leading to increased porosity formation. A one-dimensional deformable grid numerical model has been developed for predicting the evolution of a single pore in an elementary volume, which combines the diffusion model with the shrinkage affected growth. The model accounts for the change in pore size due to shrinkage

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12

Rahman, Taufiq, Hamed Lamei Ramandi, Hamid Roshan, and Stefan Iglauer. "Representative Elementary Volume of Rock Using X-Ray Microcomputed Tomography: A New Statistical Approach." Geofluids 2020 (September 1, 2020): 1–13. http://dx.doi.org/10.1155/2020/8866486.

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Rock heterogeneity is a key parameter influencing a range of rock properties such as fluid flow and geomechanical characteristics. The previously proposed statistical techniques were able to rank heterogeneity on a qualitative level to different extents; however, they need to select a threshold value for determination of representative elementary volumes (REV), which in turn makes the obtained REV subjective. In this study, an X-ray microcomputed tomography (μCT) technique was used to obtain images from different porous media. A new statistical technique was then used to compute REV, as a meas

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13

Zakirov, T. R., and M. G. Khramchenkov. "Representative elementary volumes for various characteristics of two-phase flows in porous media: A statistical approach." Geoenergy Science and Engineering 229 (October 2023): 212104. http://dx.doi.org/10.1016/j.geoen.2023.212104.

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14

Dijksma, Roel, Victor Bense, Eline Zweers, Lisette Avis, and Martine van der Ploeg. "Hydrological Characteristics of Columnar Basalt Aquifers: Measuring and Modeling Skaftafellsheiði, Iceland." Geosciences 15, no. 5 (2025): 160. https://doi.org/10.3390/geosciences15050160.

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Basalt with columnar jointing can act as a good groundwater conductor. In areas with limited water resources in sedimentary rock, such as the Deccan Traps in India and the Columbia River basalt formations in Washington State (USA), large quantities of groundwater are abstracted from such basalt formations for drinking water supply and irrigation. The hydraulic properties of basaltic formations are difficult to quantify. To obtain a better understanding of their hydraulic properties, intensive field campaigns in Iceland were combined with a conceptual groundwater model in MODFLOW. The field exp

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15

Kellers, Benjamin, Martin P. Lautenschlaeger, Nireas Rigos, Julius Weinmiller, Timo Danner, and Arnulf Latz. "Systematic Workflow for Efficient Identification of Local Representative Elementary Volumes Demonstrated with Lithium-Ion Battery Cathode Microstructures." Batteries 9, no. 7 (2023): 390. http://dx.doi.org/10.3390/batteries9070390.

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The concept of a representative elementary volume (REV) is key for connecting results of pore-scale simulations with continuum properties of microstructures. Current approaches define REVs only based on their size as the smallest volume in a heterogeneous material independent of its location and under certain aspects representing the same material at the continuum scale. However, the determination of such REVs is computationally expensive and time-consuming, as many costly simulations are often needed. Therefore, presented here is an efficient, systematic, and predictive workflow for the ident

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16

Perré, Patrick, and Ian Turner. "Determination of the Material Property Variations Across the Growth Ring of Softwood for Use in a Heterogeneous Drying Model. Part 2. Use of Homogenisation to Predict Bound Liquid Diffusivity and Thermal Conductivity." Holzforschung 55, no. 4 (2001): 417–25. http://dx.doi.org/10.1515/hf.2001.069.

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Summary In this work, the extensive knowledge of wood gained at the Ecole Nationale du Génie Rural des Eaux et Forêts by using a combination of microscopic observation and experimental work is being used to postulate material property correlations for a macroscopic heterogeneous “Cerne” growth ring model of softwood. In this second part, the method of homogenisation is used to capture the contrast of property between the gaseous phase and the solid phase. Homogenisation problems are computed using a Control Volume formulation. The tracheid model developed in Part 1 has been used to define seve

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17

Loyola, Ana Carolina, Jean-Michel Pereira, and Manoel Porfírio Cordão Neto. "General Statistics-Based Methodology for the Determination of the Geometrical and Mechanical Representative Elementary Volumes of Fractured Media." Rock Mechanics and Rock Engineering 54, no. 4 (2021): 1841–61. http://dx.doi.org/10.1007/s00603-021-02374-6.

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18

Schmidt, Selma, Max Wiebicke, and Ivo Herle. "Characterisation of the heterogeneity of a sand specimen in triaxial compression using x-ray CT and representative elementary volumes." E3S Web of Conferences 544 (2024): 04003. http://dx.doi.org/10.1051/e3sconf/202454404003.

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Standard laboratory tests, such as the triaxial test, are often considered to be element tests. But, when observing such a test, it becomes obvious that this assumption of homogeneity is far from accurate. The localisation of strain is often visible to the naked eye and becomes even more obvious when observed on the grain scale. Other variables, such as those describing the soil fabric, are expected to localise as well. In this work, two sand samples are analysed at different loading states regarding the heterogeneity of three soil variables: void ratio, coordination number and contact orienta

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19

Charon, Willy, Marie-Christine Iltchev, and Jean-François Blachot. "Mechanical simulation of a Proton Exchange Membrane Fuel Cell stack using representative elementary volumes of stamped metallic bipolar plates." International Journal of Hydrogen Energy 39, no. 25 (2014): 13195–205. http://dx.doi.org/10.1016/j.ijhydene.2014.06.125.

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20

Guévelou, Simon, Benoit Rousseau, Gilberto Domingues, Jérôme Vicente, and Cyril Caliot. "Representative elementary volumes required to characterize the normal spectral emittance of silicon carbide foams used as volumetric solar absorbers." International Journal of Heat and Mass Transfer 93 (February 2016): 118–29. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.09.069.

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21

Liu, Haifeng, Chenghao Ma, and Changqi Zhu. "X-ray Micro CT Based Characterization of Pore-Throat Network for Marine Carbonates from South China Sea." Applied Sciences 12, no. 5 (2022): 2611. http://dx.doi.org/10.3390/app12052611.

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The pore-throat network of rock exerts a vital influence on the permeability and mechanical properties of the rock. Resorting to X-ray micro-CT scanning, the present work investigates the pore-throat structure of marine biogenic carbonate samples from the South China Sea and compares them to terrigenous sedimentary sandstone. With the help of the maximum ball (MB) algorithm, the pore-throat networks inside representative elementary volumes of rock samples are revealed by stick-and-ball diagrams, which enables quantitative analyses afterwards. Higher and more deviant cross sectional porosity wa

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22

Fraccica, Alessandro, Enrique Romero, and Thierry Fourcaud. "Large cell triaxial tests of a partially saturated soil with vegetation." E3S Web of Conferences 382 (2023): 05005. http://dx.doi.org/10.1051/e3sconf/202338205005.

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The use of vegetation roots as a nature-based solution against landslides and erosion requires the definition of sample preparation protocols and adoption of equipment that allows testing representative elementary volumes of the whole soil-root system. For this purpose, large cell triaxial compression tests were carried out on fallow and vegetated samples at different degrees of saturation. Samples were prepared by static compaction of a silty sand and seeded with Cynodon dactylon. The hydraulic state during plants growth was controlled and reproduced on bare soil samples. After isotropic comp

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23

Schmidt, S., and I. Herle. "Evolution of Fabric and Strain within Representative Elementary Volumes Inside A Shear Band by Tracking Grains of a Sand Specimen in Triaxial Compression." IOP Conference Series: Earth and Environmental Science 1480, no. 1 (2025): 012067. https://doi.org/10.1088/1755-1315/1480/1/012067.

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Abstract It has been shown in several different studies that the behaviour of sands in triaxial tests is, in contrast to common assumptions, not homogeneous and that, after the localisation of strain, most of the soil behaviour takes place inside the shear band. In this work, the evolution of fabric and strain is extracted from the evolving shear band with the help of representative elementary volumes (REV) and compared with other regions inside the specimen as well as the overall behaviour. The size of the REV is determined by analysing the evolution of the fabric variables and the strain ins

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24

Grekhov, I. А., Zh М. Kurenbaeva, and Е. V. Murashova. "Novel ternary intermetallic compounds of <i>R</i><sub>4</sub>Ru<sub>2</sub>Ga<sub>3</sub> (<i>R</i> = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er)." Kristallografiâ 69, no. 4 (2024): 589–96. http://dx.doi.org/10.31857/s0023476124040043.

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A number of new isostructural ternary intermetallides of the composition R4Ru2Ga3 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) have been discovered in R–Ru–Ga ternary systems. X-ray examination of the Nd4Ru2Ga3 single crystal showed that this compound crystallizes in the monoclinic system and is a representative of a new structural type: a = 10.899(3), b = 4.0533(11), c = 9.720(3) Å, β = 111.080(7)°, C2, Z = 2, R1 = 0.043, wR2 = 0.077 for 1518 reflections. A feature of the structure is the presence of distorted fragments of RuNd6 (type AlB2) and GaNd8 (type CsCl) in it. The minimum Nd–Ru distance in a

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25

Sow, Libasse, Fabrice Bernard, Siham Kamali-Bernard, and Cheikh Mouhamed Fadel Kébé. "Experiment-based modelling of the mechanical behaviour of non-hazardous waste incineration bottom ashes treated by hydraulic binder." MATEC Web of Conferences 149 (2018): 01038. http://dx.doi.org/10.1051/matecconf/201814901038.

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Instrumented indentation tests have been carried out on an isolated 25 mm diameter particle of Non-Hazardous Waste Incineration bottom ash. These tests have enabled one to assess the intrinsic mean reduced modulus of elasticity “Er” of the particles. This result is used as input data for a 3D numerical model of Representative Elementary Volumes (REV) of a road gravel made with this kind of by-products. This numerical model is based on a multi-scale hierarchical modelling strategy. The aggregates treated with cement have been decomposed into two REV at the sub-mesoscopic and mesoscopic scales.

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26

Fariña, Pedro Ruben Viera, Rodrigo Roani, Horácio Manfrin Mazero, et al. "Accuracy assessment of bulk density measurement methods across different soil management practices: sample volume- and paraffin temperature-related errors." Acta Scientiarum. Agronomy 47, no. 1 (2024): e69343. https://doi.org/10.4025/actasciagron.v47i1.69343.

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Soil bulk density (BD) serves as a crucial physical property for characterizing soils and assessing the quality of their management systems. Various methods, including the Core, Clod, and Jolly balance (JBM) methods, are employed for BD measurement. However, these methods can yield significantly different measurements due to analytical errors. This study aims to assess the accuracy of these methods in a clayey Oxisol under different management conditions, while also identifying primary experimental errors in BD determination and strategies for their mitigation. Different statistical approaches

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27

Sow, Libasse, Fabrice Bernard, and Siham Kamali-Bernard. "Mechanical Behaviour of Cement-Bound Gravels by Experiment-Based 3D Multi-Scale Modelling: Application to Non-Hazardous Waste Incineration Bottom Ashes Aggregates for Use in Road Engineering." International Journal of Engineering Research in Africa 54 (June 2021): 71–85. http://dx.doi.org/10.4028/www.scientific.net/jera.54.71.

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This paper presents a hierarchical multi-scale modelling approach devoted to investigating the mechanical behaviour of cement-bound gravels. Material studied is based on Non-Hazardous Waste Incineration (NHWI) bottom ashes. The elastic moduli of NHWI particles have been previously determined by an original indentation campaign never conducted so far on these types of aggregates. The results of the experimental campaign serve as input data to the developed numerical strategy. The modelling is based on the definition of Representative Elementary Volumes (REV) considering all the heterogeneities

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28

Yang, Sung Soo, and Yeon June Kang. "Effect of fiber cross-section on the transport and acoustic properties of fibrous materials." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (2021): 1239–42. http://dx.doi.org/10.3397/in-2021-1785.

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Fibrous materials can efficiently dissipate acoustic energy, and their intrinsic properties are determined by fiber geometries (microscale). In this study, the effect of cross-sections of fibers on the transport and acoustic properties of fibrous materials was investigated. First, fibers of various cross-sections were modeled by adjusting their open porosity. The representative elementary volumes of fiber structures were generated to describe the periodic unit-cell structures. Next, the transport properties (such as static airflow resistivity, high-frequency limit of the dynamic tortuosity, vi

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29

Kulatilake, Pinnaduwa H. S. W., Hasan Ucpirti, and Ove Stephansson. "Effects of finite-size joints on the deformability of jointed rock at the two-dimensional level." Canadian Geotechnical Journal 31, no. 3 (1994): 364–74. http://dx.doi.org/10.1139/t94-044.

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A numerical decomposition technique, which has resulted from a linking between joint-geometry modeling and generation schemes, and a distinct element code (UDEC), is used to study the effect of joint-geometry parameters of finite-size joints on the deformability properties of jointed rock at the two-dimensional (2D) level. The influence of joint-geometry parameters such as joint density, ratio of joint size to block size, and joint orientation on the deformability of jointed rock is shown. Relations are established between deformability properties of jointed rock and fracture-tensor parameters

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30

Zielinski, Tomasz G., Nicolas Dauchez, Thomas Boutin, et al. "3D printed sound-absorbing materials with double porosity." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 3 (2023): 4100–4109. http://dx.doi.org/10.3397/in_2022_0586.

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The paper shows that acoustic materials with double porosity can be 3D printed with the appropriate design of the main pore network and the contrasted micro-porous skeleton. The microporous structure is obtained through the use of appropriate additive manufacturing (AM) technology, raw material, and process parameters. The essential properties of the microporous material obtained in this way are investigated experimentally. Two AM technologies are used to 3D print acoustic samples with the same periodic network of main pores: one provides a microporous skeleton leading to double porosity, whil

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31

Steinbrecher, Ivo, Alexander Popp, and Christoph Meier. "Consistent coupling of positions and rotations for embedding 1D Cosserat beams into 3D solid volumes." Computational Mechanics 69, no. 3 (2021): 701–32. http://dx.doi.org/10.1007/s00466-021-02111-4.

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AbstractThe present article proposes a mortar-type finite element formulation for consistently embedding curved, slender beams into 3D solid volumes. Following the fundamental kinematic assumption of undeformable cross-section s, the beams are identified as 1D Cosserat continua with pointwise six (translational and rotational) degrees of freedom describing the cross-section (centroid) position and orientation. A consistent 1D-3D coupling scheme for this problem type is proposed, requiring to enforce both positional and rotational constraints. Since Boltzmann continua exhibit no inherent rotati

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32

Claes, Steven, Fadi H. Nader, and Souhail Youssef. "Coupled experimental/numerical workflow for assessing quantitative diagenesis and dynamic porosity/permeability evolution in calcite-cemented sandstone reservoir rocks." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 73 (2018): 36. http://dx.doi.org/10.2516/ogst/2018027.

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Some of the world best hydrocarbon reservoirs (carbonates and siliciclastics) are also believed to be valuable for subsurface storage of CO2 and other fluids. Yet, these reservoirs are heterogeneous in terms of their mineralogy and flow properties, at varying spatial-temporal scales. Therefore, predicting the porosity and permeability (flow properties) evolution of carbonates and sandstones remains a tedious task. Diagenesis refers to the alteration of sedimentary rocks through geologic time, mainly due to rock-fluid interactions. It affects primarily the flow properties (porosity and permeabi

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33

Cazaurang, Simon, Manuel Marcoux, Oleg S. Pokrovsky, et al. "Numerical assessment of morphological and hydraulic properties of moss, lichen and peat from a permafrost peatland." Hydrology and Earth System Sciences 27, no. 2 (2023): 431–51. http://dx.doi.org/10.5194/hess-27-431-2023.

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Abstract. Due to its insulating and draining role, assessing ground vegetation cover properties is important for high-resolution hydrological modeling of permafrost regions. In this study, morphological and effective hydraulic properties of Western Siberian Lowland ground vegetation samples (lichens, Sphagnum mosses, peat) are numerically studied based on tomography scans. Porosity is estimated through a void voxels counting algorithm, showing the existence of representative elementary volumes (REVs) of porosity for most samples. Then, two methods are used to estimate hydraulic conductivity de

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34

Kolegov, Grigoriy A., and Aleksey Yu Krainov. "Simulation of the coal mine ventilation with account for gob areas." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 79 (2022): 78–88. http://dx.doi.org/10.17223/19988621/79/7.

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Mine ventilation network models are widely used in underground coal mining in Russia. The models cover a variety of practical problems ranging from simple air distribution in active mine workings to changes in the static air pressure gradient associated with complex technological or hazardous processes occurring in mines. Isolated gob areas are integral parts of ventilation networks in coal mines. The most commonly used underground coal extraction technology in Russia is the longwall mining. A gob forms when a coal seam is extracted, and the upper layers of the rock cave in. Gobs are isolated

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35

Martus, Olena, Branimir Cvetkovic, Olena Mykhailovska, Andrii Yaholnyk, and Anna Liashenko. "Improvement of prediction of oil displacement efficiency during waterflooding due to detailing of lithological distribution." Technology audit and production reserves 3, no. 1(83) (2025): 72–77. https://doi.org/10.15587/2706-5448.2025.331872.

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The object of research is the process of oil displacement during waterflooding. The research aims to develop and substantiate a methodology that improves the reliability of predicting oil displacement efficiency during waterflooding. For this purpose, the classical Buckley-Leverett method and the State Standard of Ukraine method for calculating the oil displacement efficiency during waterflooding were extended by integrating lithological data, which allows considering the influence of geological characteristics on the process of oil displacement by water. The developed methodology for improvin

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36

Zhang, Jing, Richeng Liu, Liyuan Yu, Shuchen Li, Xiaolin Wang, and Ding Liu. "An Equivalent Pipe Network Modeling Approach for Characterizing Fluid Flow through Three-Dimensional Fracture Networks: Verification and Applications." Water 14, no. 10 (2022): 1582. http://dx.doi.org/10.3390/w14101582.

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The equivalent pipe network (EPN) model is an effective way to model fluid flow in large-scale fractured rock masses with a complex fracture network due to its straightforwardness and computational efficiency. This study presents the EPN model for characterizing fluid flow through three-dimensional fracture networks using the Monte-Carlo method. The EPN model is extracted from an original three-dimensional discrete fracture network (DFN) model and is used to simulate the fluid flow processes. The validity of the proposed EPN modeling approach is verified via the comparisons of permeability (k)

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37

de Araújo, O. M. O., K. V. Sharma, A. S. Machado, et al. "Representative elementary volume in limestone sample." Journal of Instrumentation 13, no. 10 (2018): C10003. http://dx.doi.org/10.1088/1748-0221/13/10/c10003.

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38

Zhang, M. Z., G. Ye, and K. Van Breugel. "Un método numérico-estadístico para determinar el volumen elemental representativo (VER) de la pasta de cemento en la medición de la difusividad." Materiales de Construcción 60, no. 300 (2010): 7–20. http://dx.doi.org/10.3989/mc.2010.60810.

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39

Trotsuk, I. V., and M. V. Subbotina. "‘Core’ and ‘periphery’ of the concepts ‘happiness’ and ‘justice’: Unfinished sentences technique as a means of validation." RUDN Journal of Sociology 22, no. 4 (2022): 782–801. http://dx.doi.org/10.22363/2313-2272-2022-22-4-782-801.

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The article continues a series of publications based on the results of a long-term research project of the Sociology Chair of the RUDN University, which combines research and methodological study of the self-identification of Russian students in terms of happiness. At the current stage, two new ‘dimensions’ were added to the project: first, the contextualization of questions about happiness by the concept and elements of social justice (as its ‘external determinant’); second, ‘measuring’ the images of a happy/unhappy person with the projective technique (unfinished sentences) and taking into a

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40

EDWARDS, MARK S., and PETER GRINDROD. "A CHANNEL NETWORK MODEL FOR CHEMICAL MIGRATION IN SUBSURFACE MEDIA." Mathematical Models and Methods in Applied Sciences 05, no. 05 (1995): 641–57. http://dx.doi.org/10.1142/s0218202595000371.

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We consider the migration of chemical species through saturated heterogeneous media, where the scale of the flow path geometry is large enough to invalidate a Fickian based, representative elementary volumes, approach to dispersal. Channel network models combine the effects of channeling over small spatial scales with network mixing which gives rise to an equivalent dispersion effect over large spatial scales. We extend equations and solutions given previously for ideal nonabsorbing tracers, to include the retardation of chemically active species. The primary aim is to derive explicit solution

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41

Zhang, Ting Ting, E. Chuan Yan, Xian Ming Hu, and Yang Bing Cao. "Fractal Description of Rock Mass Structure Representative Elementary Volume." Advanced Materials Research 594-597 (November 2012): 439–45. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.439.

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The mechanical parameters of the rock masses are scale dependent because of the existence of the discontinuities. The self-similarity of the discontinuities makes the application of fractal theory in the description of the rock mass structure possible. The novel point in this study is that the structure representative elementary volume (SREV) of rock mass is proposed. Rock mass structures were obtained through the two-dimensional discontinuity network simulation results, from which ten pieces of square rock mass specimens were chosen. The side lengths of the specimens were increased in turn fr

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Puyguiraud, Alexandre, Philippe Gouze, and Marco Dentz. "Is There a Representative Elementary Volume for Anomalous Dispersion?" Transport in Porous Media 131, no. 2 (2019): 767–78. http://dx.doi.org/10.1007/s11242-019-01366-z.

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Xue, Yufang, Zhongxian Cai, Heng Zhang, et al. "Insights into Heterogeneity and Representative Elementary Volume of Vuggy Dolostones." Energies 15, no. 16 (2022): 5817. http://dx.doi.org/10.3390/en15165817.

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Carbonate reservoirs commonly have significant heterogeneity and complex pore systems due to the multi-scale characteristic. Therefore, it is quite challenging to predict the petrophysical properties of such reservoirs based on restricted experimental data. In order to study the heterogeneity and size of the representative elementary volume (REV) of vuggy dolostones, a total of 26 samples with pore sizes ranging from micrometers to centimeters were collected from the Cambrian Xiaoerbulake Formation at the Kalping uplift in the Tarim Basin of northwestern China. In terms of the distribution of

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Rong, Guan, Jun Peng, Xiaojiang Wang, Guang Liu, and Di Hou. "Permeability tensor and representative elementary volume of fractured rock masses." Hydrogeology Journal 21, no. 7 (2013): 1655–71. http://dx.doi.org/10.1007/s10040-013-1040-x.

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Li, J. H., L. M. Zhang, Y. Wang, and D. G. Fredlund. "Permeability tensor and representative elementary volume of saturated cracked soil." Canadian Geotechnical Journal 46, no. 8 (2009): 928–42. http://dx.doi.org/10.1139/t09-037.

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Cracks are prevalent in near-ground-surface soils and provide preferential pathways for fluid flow. Cracks increase water infiltration or contaminant solute transport into soils. This paper studies the development of a permeability tensor and a representative elementary volume (REV) for saturated cracked soils. First, a method of generating random crack networks based on the statistical parameters of the crack geometry is presented. Then, the permeability tensor and REV for a crack network are studied by modeling water flow through the generated random crack networks. Finally, the permeability

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Gasmi, Hatem, Mabrouk Touahmia, Ahmed Torchani, Essaieb Hamdi, and Attia Boudjemline. "Determination of Fractured Rock's Representative Elementary Volume by a Numerical Simulation Method." Engineering, Technology & Applied Science Research 9, no. 4 (2019): 4448–51. https://doi.org/10.5281/zenodo.3370634.

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The present study aims at developing a numerical program called DISSIM which can analyze the homogenization of rock massifs using a new subroutine which calculates Representative Elementary Volume (REV). The DISSIM methodology consists of two steps. The first step involves the modeling of the fractured network in order to provide a surface simulation that represents the real fracture of the examined front. The second step is to numerically model the wave propagation through the simulated fracture network while characterizing the attenuation of vibrations due to the effect of discontinuities. T

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Wang, Da Yong, Hu Shan Xu, and Xiao Jing Ma. "Computed Tomography Analysis of Representative Elementary Volume (REV) of Porous Medium." Advanced Materials Research 868 (December 2013): 234–37. http://dx.doi.org/10.4028/www.scientific.net/amr.868.234.

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Representative Elementary Volume (REV) is not only a necessary measure for studying heterogeneous pore structure of reservoir rocks but also an important parameter for core-scale numerical modeling. In this paper, we accordingly analyze the REV for different porous media with different grain sizes based on computed tomography (CT) measurement. Our results show that that CT measurement is a relible method for REV analysis and that there is an appropriate linear relationship between grain size and REV.

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Sedaghat, Mohammad H., and Siroos Azizmohammadi. "Representative-Elementary-Volume Analysis of Two-Phase Flow in Layered Rocks." SPE Reservoir Evaluation & Engineering 22, no. 03 (2019): 1075–83. http://dx.doi.org/10.2118/194014-pa.

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Sutopo, Norio ARIHARA, Kozo SATO, and Maghsood ABBASZADEH. "Representative Elementary Volume of Naturally Fractured Reservoirs Evaluated by Flow Simulation." Journal of the Japan Petroleum Institute 45, no. 3 (2002): 156–68. http://dx.doi.org/10.1627/jpi.45.156.

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Razavi, MR, B. Muhunthan, and O. Al Hattamleh. "Representative Elementary Volume Analysis of Sands Using X-Ray Computed Tomography." Geotechnical Testing Journal 30, no. 3 (2007): 100164. http://dx.doi.org/10.1520/gtj100164.

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