Letteratura scientifica selezionata sul tema "Representative elementary volumes"
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Articoli di riviste sul tema "Representative elementary volumes"
Lukas, M. Keller. "On the representative elementary volumes of clay rocks at the mesoscale". Journal of Geology and Mining Research 7, n. 6 (19 giugno 2015): 58–64. http://dx.doi.org/10.5897/jgmr2015.0224.
Testo completoYoon, Hongkyu, e Thomas A. Dewers. "Nanopore structures, statistically representative elementary volumes, and transport properties of chalk". Geophysical Research Letters 40, n. 16 (19 agosto 2013): 4294–98. http://dx.doi.org/10.1002/grl.50803.
Testo completoMontagne, David, Isabelle Cousin, Lydie Le Forestier, Joël Daroussi e Sophie Cornu. "Quantification of soil volumes in the Eg & Bt-horizon of an Albeluvisol using image analysis". Canadian Journal of Soil Science 87, n. 1 (1 gennaio 2007): 51–59. http://dx.doi.org/10.4141/s05-029.
Testo completoUkrainczyk, N., e 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, n. 3 (28 febbraio 2014): 035001. http://dx.doi.org/10.1088/0965-0393/22/3/035001.
Testo completoMilani, Marco, J. Germán Rubino, Tobias M. Müller, Beatriz Quintal, Eva Caspari e Klaus Holliger. "Representative elementary volumes for evaluating effective seismic properties of heterogeneous poroelastic media". GEOPHYSICS 81, n. 2 (18 febbraio 2016): D21—D33. http://dx.doi.org/10.1190/geo-2015-0173.1.
Testo completoMilani, Marco, J. Germán Rubino, Tobias M. Müller, Beatriz Quintal, Eva Caspari e Klaus Holliger. "Representative elementary volumes for evaluating effective seismic properties of heterogeneous poroelastic media". GEOPHYSICS 81, n. 2 (1 marzo 2016): D169—D181. http://dx.doi.org/10.1190/geo2015-0173.1.
Testo completoTeruel, Federico E., e Rizwan-uddin. "Numerical computation of macroscopic turbulence quantities in representative elementary volumes of the porous medium". International Journal of Heat and Mass Transfer 53, n. 23-24 (novembre 2010): 5190–98. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2010.07.041.
Testo completoBruns, S., S. L. S. Stipp e H. O. Sørensen. "Statistical representative elementary volumes of porous media determined using greyscale analysis of 3D tomograms". Advances in Water Resources 107 (settembre 2017): 32–42. http://dx.doi.org/10.1016/j.advwatres.2017.06.002.
Testo completoKhassanov, Damir I., e Marat A. Lonshakov. "The investigation of the scale effect on porosity in Bashkirian limestones". Izvestiya of Saratov University. New Series. Series: Earth Sciences 21, n. 2 (24 giugno 2021): 137–47. http://dx.doi.org/10.18500/1819-7663-2021-21-2-137-147.
Testo completoHendrick, A. G., R. G. Erdmann e M. R. Goodman. "Practical Considerations for Selection of Representative Elementary Volumes for Fluid Permeability in Fibrous Porous Media". Transport in Porous Media 95, n. 2 (2 agosto 2012): 389–405. http://dx.doi.org/10.1007/s11242-012-0051-8.
Testo completoTesi sul tema "Representative elementary volumes"
Tran, Quang Vu. "Locally heterogeneous three-dimensional fibrous media : Representative elementary volumes and calculation of acoustic properties". Electronic Thesis or Diss., Université Gustave Eiffel, 2023. http://www.theses.fr/2023UEFL2081.
Testo completoThis thesis explores the complex relationship between the structures, acoustic properties, and manufacturing processes of non-woven fiber materials. Two families of composite fibrous media, derived from recycled textile fibers and recycled PET fibers, were studied, offering a diversity of polydispersity. Through microstructural characterization and numerical homogenization, this research identified key parameters associated with transport and sound absorption properties.The volume-weighted mean diameter Dv and inverse volume weighted mean diameter Div were found to be essential geometric descriptors. They explain acoustic behaviors at different frequencies, revealing that viscous and thermal exchanges occur through the widest channels of the microstructure at low frequencies; while at high frequencies, the acoustic signature is influenced by the entire microstructure, including the smallest constrictions.The original contributions of this research include (1) the development of Representative Elementary Volumes (REVs) for polydisperse fibrous media; (2) solving an optimization problem based on the degree of polydispersity; (3) and proposing an experimental technique to estimate transport properties at high frequencies.In summary, this thesis offers promising perspectives for understanding and optimizing the acoustic properties of polydisperse fibrous media while identifying crucial microstructural descriptors for these complex materials
Zhou, Pin. "The Use of the Continuity Factor as a Tool to Represent Representative Elementary Volume in Rock Engineering Design". Licentiate thesis, KTH, Jord- och bergmekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144591.
Testo completoMin, Ki-Bok. "Determination of equivalent hydraulic and mechanical properties of fractured rock masses using the distinct element method". Licentiate thesis, KTH, Land and Water Resources Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1550.
Testo completoThe equivalent continuum approach uses equivalent propertiesof rock mass as the input data for a continuum analysis. Thisis a common modeling method used in the field of rock mechanicsand hydrogeology. However, there are still unresolvedquestions; how can the equivalent properties be determined andis the equivalent continuum approach suitable for modeling thediscontinuous fractured rock mass.
The purpose of this paper is to establish a methodology todetermine the equivalent hydraulic and mechanical properties offractured rock masses by explicit representations of stochasticfracture systems, to investigate the scale-dependency of theproperties, and to investigate the conditions for theapplication of the equivalent continuum approach for thefractured rock masses. Geological data used for this study arefrom the site characterization of Sellafield, Cumbria, UK. Aprogram for the generation of stochastic Discrete FractureNetwork (DFN) is developed for the realization of fractureinformation and ten parent DFN models are constructed based onthe location, trace length, orientation and density offractures. Square models with the sizes varying from 0.25 m× 0.25 m to 10 m × 10 m are cut from the center ofthe each parent network to be used for the scale dependencyinvestigation. A series of the models in a parent network arerotated in 30 degrees interval to be used for investigation oftensor characteristic. The twodimensional distinct elementprogram, UDEC, was used to calculate the equivalentpermeability and compliance tensors based on generalizedDarcys law and general theory of anisotropic elasticity.Two criteria for the applicability of equivalent continuumapproach were established from the investigation: i) theexistence of properly defined REV (Representative ElementaryVolume) and ii) existence of the tensor in describing theconstitutive equation of fractured rock The equivalentcontinuum assumption cannot be accepted if any one of the abovetwo criteria is not met. Coefficient of variation and meanprediction error is suggested for the measures toquantitatively evaluate the errors involved in scale dependencyand tensor characteristic evaluation.
Equivalent permeability and mechanical properties (includingelastic modulus and Poissons ratios) determined onrealistic fracture network show that the presence of fracturehas a significant effect on the equivalent properties. Theresults of permeability, elastic moduli and Poisson's ratioshow that they narrow down with the increase of scale andmaintain constant range after a certain scales with someacceptable variation. Furthermore, Investigations of thepermeability tensor and compliance tensor in the rotated modelshow that their tensor characteristics are satisfied at acertain scale; this would indicate that the uses of theequivalent continuum approach is justified for the siteconsidered in this study.
The unique feature of the thesis is that it gives asystematic treatment of the homogenization and upscaling issuesfor the hydraulic and mechanical properties of fractured rockswith a unified approach. These developments established a firmfoundation for future application to large-scale performanceassessment of underground nuclear waste repository byequivalent continuum analysis.
Keywords :Equivalent continuum approach, Equivalentproperty, Representative Elementary Volume (REV), DistinctElement Method, Discrete Fracture Network (DFN)
Baghbanan, Alireza. "Scale and Stress Effects on Hydro-Mechanical Properties of Fractured Rock Masses". Doctoral thesis, KTH, Teknisk geologi och geofysik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4772.
Testo completoQC 20100702
Noorian-Bidgoli, Majid. "Strength and deformability of fractured rocks". Doctoral thesis, KTH, Mark- och vattenteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155719.
Testo completoQC 20141111
Farichah, Himatul, e 法麗佳. "Representative Elementary Volume of P32 and Hydraulic Conductivity of Fractured Rock masses". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/u97928.
Testo completo國立中央大學
土木工程學系
105
This study presents the representative elementary volume (REV) of P32 (fracture intensity) and hydraulic conductivity of fractured rock mass. Discrete fracture network (DFN) generated by FracMan is adopted to create rock mass models. A series of parametric studies including dip angle, dip direction, Fisher constant κ, size of rock mass model, shape of rock mass model, specimen volume, fracture diameter, and P32 were investigated to study the REV of P32. Based on the results of the parametric studies, a novel equation to quantify the COV (Coefficient of variance) of P32 in terms of specimen volume, fracture diameter and P32 was established. A precise REV size can be obtained easily by assigning the acceptable COV. Thereafter, some case studies were used to verify the proposed novel equation. Conventional Oda and Oda gold were adopted to estimate the hydraulic conductivity of the fractured rock mass. By using Oda conventional, a series of parametric studies including specimen volume, fracture diameter, P32, transmissivity, and aperture were investigated to study the REV of hydraulic conductivity. Subsequently, that REV of hydraulic conductivity was compared with the REV of P32. In the other hand, by using Oda gold, only P32 was chosen as parametric study. Eventually, a proposed new method was conducted by examining the Monte Carlo simulation for REV of hydraulic conductivity determination.
Chen, Chih-Yang, e 陳志揚. "Scale Effect of Representative Elementary Volume and Related Hydraulic Parameters for Fractured Rock Mass and Associated Influence on Results of Groundwater Flow Simulation". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/est592.
Testo completo國立臺北科技大學
資源工程研究所
105
In recent years, the large-scale construction projects and environmental resources related issues had brought attentions and rapid development on hydrogeology and other academic field connected to it. Rock engineering, including large-scale underground laboratory, tunnel excavation and hydrogeological well site, requires a certain degree of understanding on hydrogeology and hydraulic parameters, in order to facilitate subsequent planning and related construction. However, the presence of discontinuities in rock mass generates heterogeneity and anisotropy in its engineering characteristics, increasing variation of hydraulic and conductivity parameters, resulting in difficulty for determining representative parameters. Investigation and characterization of hydrogeological parameters of fracture rock masses are crucial to underground water exploiting. Among which, defining the hydrogeological representative elementary volume of the site is one of the key items. How to evaluate the hydrogeological unit to the scale of the target rock engineering is an important issue in hydrogeological parameters characterization. Based on previous research results, this thesis present an assessment process for representative elementary volume on hydraulic parameter characterization on account of a hydraulic parameter characterization model for fractured rock mass. Investigation and statistical test are applied to estimate the variation degrees of representative elementary volume in site and associated hydraulic conductivity in rock mass, which further determine the scale influence on each hydraulic characteristic parameters, the methodology of the establishment and extension of application is through by Heshe hydrogeological well site, and another tunnel case project in initiative in north Taiwan. The evaluation method of representative elementary volume in hydraulic characteristic establish by statistical error propagation theory to calculate the varying degrees between the characteristic parameters and hydraulic conductivity, and the empirical formula of different hydraulic conductivity is discussed to find the variation range and plotted out different scales in a result. In order to understand the behavior of hydraulic conductivity associated with representative elementary volume changes, this research applies groundwater modeling system to establish numerical model and analysis it. Firstly, the anisotropy is simulated with a single element, the error between the two elements is calculated by numerical solution and analytic solution. Then, convert the goal of simulation scale to in-situ cross-hole pumping test which in heshe well site. Secondly, parameter sensitivity analysis is carried out to understand the representative elementary volume and its related parameters. Scale variation is using for complete numerical simulation methodology parallel verification, and establish the accuracy and correctness of the model. The case study is aimed at extending the application of different representative elementary volumes on the volume of seepage flow caused by tunnel excavation, which extend the application of methodologies in a large number of site surveys and numerical models. The results show that the representative elementary volume evaluation program can effectively describe the change of the hydraulic characteristic parameters and the hydraulic conductivity coefficient with the scale variation by the statistical error propagation accumulation theory, and verify the groundwater anisotropy by numerical simulation. The related parameter sensitivity analysis shows that the numerical solution and the analytical solution will produce a certain range of errors in the setting of the boundary condition. The determination of the error value can provide the numerical model to improve the accuracy and correctness of the subsequent research. The hydraulic characteristic parameters of representative elementary volumes are on different scales, which changed in the groundwater seepage caused by tunneling, that with a certain degree of influence of groundwater through the three-dimensional simulation. We provide a valuable technical reference from the conceptual model, narrative model, and hydraulics model all the way to numerical model, through the outcome of methodology in designing verification and applying in this study.
Libri sul tema "Representative elementary volumes"
Göttler, Christine, e Mia M. Mochizuki. Landscape and Earth in Early Modernity. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2022. http://dx.doi.org/10.5117/9789463729437.
Testo completoCapitoli di libri sul tema "Representative elementary volumes"
Andreeva, M. V., A. V. Kalyuzhnyuk, V. V. Krutko, N. E. Russkikh e I. A. Taimanov. "Representative Elementary Volume via Averaged Scalar Minkowski Functionals". In Lecture Notes in Mechanical Engineering, 533–39. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92144-6_40.
Testo completoBachmat, Yehuda, e Jacob Bear. "On the Concept and Size of a Representative Elementary Volume (Rev)". In Advances in Transport Phenomena in Porous Media, 3–20. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3625-6_1.
Testo completo"Representative Elementary Volume". In Encyclopedia of Agrophysics, 693. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-3585-1_794.
Testo completo"A Representative Elementary Volume of a Porous Medium". In Nanothermodynamics, 255–74. WORLD SCIENTIFIC, 2023. http://dx.doi.org/10.1142/9789811275005_0017.
Testo completoPan, H., J. Wan e X. Liang. "A method for determining representative elementary volume of rock masses". In Water-Rock Interaction. Taylor & Francis, 2007. http://dx.doi.org/10.1201/noe0415451369.ch28.
Testo completoMoriarty, John A. "Local Volume Effects on Defects and Free Surfaces". In Theory and Application of Quantum-Based Interatomic Potentials in Metals and Alloys, 460–79. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/oso/9780198822172.003.0011.
Testo completoBraudeau, Erik, e Rabi H. Mohtar. "Soil-water Modelling Framework Using Pedostructure and Structural Representative Elementary Volume (SREV) Concepts". In Novel Perspectives of Geography, Environment and Earth Sciences Vol. 2, 111–38. B P International (a part of SCIENCEDOMAIN International), 2023. http://dx.doi.org/10.9734/bpi/npgees/v2/17671d.
Testo completoBaranov, L. A., e Y. A. Ermolin. "AN OPERATIONAL RELIABILITY MEASURE FOR ONE CLASS OF TECHNICAL OBJECTS". In Intellectual Transport Systems, 34–37. Russian University of Transport, Moscow, Russian Federation, 2023. http://dx.doi.org/10.30932/9785002182794-2023-34-37.
Testo completoSanguigno, Luigi, Marcello Antonio Lepore e Angelo Rosario Maligno. "Characterization of Titanium Metal Matrix Composites (Ti-MMC) Made Using Different Manufacturing Routes". In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210030.
Testo completoZhou, P., e F. Johansson. "On the use of the continuity factor for rock mass properties based on a literature review of the representative elementary volume". In Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, 427–31. CRC Press, 2014. http://dx.doi.org/10.1201/b16955-71.
Testo completoAtti di convegni sul tema "Representative elementary volumes"
Li, Yang, Tong Wang, Xin-Lin Xia, Chuang Sun, Qing Ai e Heping Tan. "PORE-LEVEL DETERMINATION OF REPRESENTATIVE ELEMENTARY VOLUMES FOR EXTINCTION COEFFICIENTS OF METAL FOAMS". In International Heat Transfer Conference 16. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihtc16.rti.022501.
Testo completoHaussener, Sophia, Wojciech Lipin´ski, Peter Wyss e Aldo Steinfeld. "Tomography-Based Analysis of Radiative Transfer in Reacting Packed Beds Undergoing a Solid-Gas Thermochemical Transformation". In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88030.
Testo completoGoldfarb, Eric J., Ken Ikeda e Nicola Tisato. "Evaluating samples smaller than the representative elementary volume (REV)". In First International Meeting for Applied Geoscience & Energy. Society of Exploration Geophysicists, 2021. http://dx.doi.org/10.1190/segam2021-3594787.1.
Testo completoWu, Xuehai, John G. Georgiadis e Assimina A. Pelegri. "Biphasic Representative Elemental Volumes for 3-D White Matter Elastography". In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-73372.
Testo completoKonovalov, D. A., E. O. Smirnova e A. S. Smirnov. "Determining AlMg6/10%SiCp representative elementary volume size by kinetic indentation". In MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS-2018): Proceedings of the 12th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Author(s), 2018. http://dx.doi.org/10.1063/1.5084483.
Testo completoMathieu, Jean-Philippe, Olivier Diard, Karim Inal e Sophie Berveiller. "Micromechanical Modeling of Brittle Fracture of French RPV Steel: A Comprehensive Study of Stress Triaxiality Effect". In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61334.
Testo completoAl Hattamleh, O., M. Razavi e B. Muhunthan. "Experimental determination of representative elementary volume of sands using X-ray computed tomography". In MATERIALS CHARACTERISATION 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/mc090141.
Testo completoMbodj, Coumba, Mathieu Renouf, Laurent Baillet e Yves Berthier. "Modeling of Carbon/Carbon Composites Under Tribological Solicitations". In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41133.
Testo completoKeehm, Youngseuk, e Tapan Mukerji. "Permeability and relative permeability from digital rocks: Issues on grid resolution and representative elementary volume". In SEG Technical Program Expanded Abstracts 2004. Society of Exploration Geophysicists, 2004. http://dx.doi.org/10.1190/1.1845147.
Testo completoZhou, Feng, Nicholas Hansen e Ivan Catton. "Obtaining Closure for Heat Exchanger Modeling Based on Volume Averaging Theory (VAT)". In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22971.
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