Academic literature on the topic 'Effective medium modelling'

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Journal articles on the topic "Effective medium modelling"

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Zhuromskyy, Oleksandr. "Applicability of Effective Medium Approximations to Modelling of Mesocrystal Optical Properties." Crystals 7, no. 1 (2016): 1. http://dx.doi.org/10.3390/cryst7010001.

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Lee, S. L., and J. H. Yang. "Modelling of effective thermal conductivity for a nonhomogeneous anisotropic porous medium." International Journal of Heat and Mass Transfer 41, no. 6-7 (1998): 931–37. http://dx.doi.org/10.1016/s0017-9310(97)00170-1.

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Janicki, Vesna, Jordi Sancho-Parramon, and Hrvoje Zorc. "Refractive index profile modelling of dielectric inhomogeneous coatings using effective medium theories." Thin Solid Films 516, no. 10 (2008): 3368–73. http://dx.doi.org/10.1016/j.tsf.2007.09.016.

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Jensen, Erling Hugo, Leiv-J. Gelius, Tor Arne Johansen, and Zhong Wang. "Consistent joint elastic-electrical differential effective-medium modelling of compacting reservoir sandstones." Geophysical Prospecting 61, no. 4 (2012): 788–802. http://dx.doi.org/10.1111/1365-2478.12014.

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Gutiérrez, Yael, Dolores Ortiz, Rodrigo Alcaraz de la Osa, José M. Saiz, Francisco González, and Fernando Moreno. "Electromagnetic Effective Medium Modelling of Composites with Metal-Semiconductor Core-Shell Type Inclusions." Catalysts 9, no. 7 (2019): 626. http://dx.doi.org/10.3390/catal9070626.

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The possibility of using light to drive chemical reactions has highlighted the role of photocatalysis as a key tool to address the environmental and energy issues faced by today’s society. Plasmonic photocatalysis, proposed to circumvent some of the problems of conventional semiconductor catalysis, uses hetero-nanostructures composed by plasmonic metals and semiconductors as catalysts. Metal-semiconductor core-shell nanoparticles present advantages (i.e., protecting the metal and enlarging the active sites) with respect to other hetero-nanostructures proposed for plasmonic photocatalysis appli
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Gong, Lunlun, Yonghong Wang, Xudong Cheng, Ruifang Zhang, and Heping Zhang. "A novel effective medium theory for modelling the thermal conductivity of porous materials." International Journal of Heat and Mass Transfer 68 (January 2014): 295–98. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2013.09.043.

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Soboleva, Olga N., and Ekaterina P. Kurochkina. "Subgrid modelling of convective diffusion in a multiscale random medium." Russian Journal of Numerical Analysis and Mathematical Modelling 34, no. 3 (2019): 151–62. http://dx.doi.org/10.1515/rnam-2019-0013.

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Abstract Effective coefficients for convective diffusion equations are obtained. Correlated random fields of conductivity and porosity are approximated by multiplicative cascades with log-normal distributions of probabilities. The theoretical result is checked numerically for the case of 3D plane flow of an incompressible fluid.
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Gilbert, R. P., and A. Panchenko. "Effective acoustic equations for a two-phase medium with microstructure." Mathematical and Computer Modelling 39, no. 13 (2004): 1431–48. http://dx.doi.org/10.1016/j.mcm.2004.07.002.

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Kim, Sangtae, and William B. Russel. "Modelling of porous media by renormalization of the Stokes equations." Journal of Fluid Mechanics 154 (May 1985): 269–86. http://dx.doi.org/10.1017/s0022112085001525.

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The permeability of a random array of fixed spheres has been calculated over the range of volume fractions from dilute to almost closest packing, by assuming pairwise-additive (low-Reynolds-number) hydrodynamic interactions within an effective medium. Non-convergent pair interactions arising from the long-range decay of the Stokeslet were removed by renormalizing the Stokes equation to determine the permeability of the effective medium, i.e. to include the mean screening effect of the other spheres. Pair interactions in this Brinkman medium were calculated by the method of reflections in the f
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Wieczorek, W., A. Zalewska, M. Siekierski, and J. Przyłuski. "Modelling the a.c. conductivity behaviour of composite polymeric electrolytes by the effective medium theory." Solid State Ionics 86-88 (July 1996): 357–62. http://dx.doi.org/10.1016/0167-2738(96)00147-6.

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Dissertations / Theses on the topic "Effective medium modelling"

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Lannebere, Sylvain. "Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif." Phd thesis, Bordeaux 1, 2011. http://tel.archives-ouvertes.fr/tel-00657905.

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Ce travail de thèse a été consacré à l'étude théorique et numérique de métamatériaux pour la gamme submillimétrique (domaine térahertz), formés de sphères diélectriques présentant des résonances dipolaires de Mie électrique et magnétique, dispersées dans un milieu-hôte. Tout d'abord, les matériaux à utiliser ainsi que les tailles et fraction volumique des sphères permettant l'obtention d'effets de perméabilité ont été précisées. Ensuite, nous avons mené une étude de la polydispersité en taille et donné les distributions en taille limite à ne pas dépasser lors d'une synthèse chimique. Nous avon
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Pepenene, Refuoe Donald. "Macroscopic and Microscopic surface features of Hydrogenated silicon thin films." University of the Western Cape, 2018. http://hdl.handle.net/11394/6414.

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Magister Scientiae - MSc (Physics)<br>An increasing energy demand and growing environmental concerns regarding the use of fossil fuels in South Africa has led to the challenge to explore cheap, alternative sources of energy. The generation of electricity from Photovoltaic (PV) devices such as solar cells is currently seen as a viable alternative source of clean energy. As such, crystalline, amorphous and nanocrystalline silicon thin films are expected to play increasingly important roles as economically viable materials for PV development. Despite the growing interest shown in these materials,
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Ellis, M. H., T. A. Minshull, M. C. Sinha, and Angus I. Best. "JOINT SEISMIC/ELECTRICAL EFFECTIVE MEDIUM MODELLING OF HYDRATE-BEARING MARINE SEDIMENTS AND AN APPLICATION TO THE VANCOUVER ISLAND MARGIN." 2008. http://hdl.handle.net/2429/1158.

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Remote determination of the hydrate content of marine sediments remains a challenging problem. In the absence of boreholes, the most commonly used approach involves the measurement of Pwave velocities from seismic experiments. A range of seismic effective medium methods has been developed to interpret these velocities in terms of hydrate content, but uncertainties about the pore-scale distribution of hydrate can lead to large uncertainties in this interpretation. Where borehole geophysical measurements are available, electrical resistivity is widely used as a proxy for hydrate content, a
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Book chapters on the topic "Effective medium modelling"

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Milton, G. W. "Modelling the Properties of Composites by Laminates." In Homogenization and Effective Moduli of Materials and Media. Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4613-8646-9_7.

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ARNAUTOVSKI, Vesna, Dragan MIHAJLOV, and Vladimir DUKOVSKI. "SOLID MODELLING FOR NC MACHINING ANIMATION." In A Cost Effective Use of Computer Aided Technologies and Integration Methods in Small and Medium Sized Companies. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-08-042061-5.50016-2.

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Ghanbarian, Behzad, and Allen G. Hunt. "Modelling flow and transport in variably saturated porous media: Applications from percolation theory and effective-medium approximation." In Modelling of Flow and Transport in Fractal Porous Media. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-817797-6.00001-4.

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Monizza, Gabriele Pasetti, Christoph Paul Schimanski, Giada Malacarne, and Dominik T. Matt. "BIM Simulation Lab." In Advances in Civil and Industrial Engineering. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7091-3.ch006.

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The architecture, engineering, and construction (AEC) sector is facing the digital transformation by promoting the building information modelling (BIM) as a standard methodology for the digital managing of information along the whole lifecycle of a construction work. Although small-medium enterprises (SMEs) and public administrations (PAs) are aware of the BIM benefit, they ask for pilot actions and tools for testing BIM applications in their daily activities in order to measure benefits and difficulties in detail. This chapter discusses the BIM Simulation Lab initiative which aims at establishing a laboratory for an effective and efficient BIM implementation, by promoting a physical space and specific services for supporting the territory in the DT. The authors describe the concept of the lab and they introduce an assessment method that adopts an indirect approach of the BIM benefit assessment leveraging principles from construction cost estimation and probabilistic risk management.
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Ahmad, Mifrah, Lukman Ab Rahim, Kamisah Osman, and Noreen Izza Arshad. "Towards Modelling Effective Educational Games Using Multi-Domain Framework." In Advanced Methodologies and Technologies in Media and Communications. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7601-3.ch014.

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Game-based learning (GBL) has dominantly become an emerging teaching industry in 21st century. To provide an effective development of educational games (EG) with assurance of effectiveness, modelling and design methods are highlighted. To model EG, game developers must understand existing elements' interaction and relationships. The elements of EG have been documented in literature; however, the relationships are not well documented. Hence, this research has established these relationships by conducting a literature survey and identifying the relationships between different elements. Consequently, they are validated by eight game-based learning experts via qualitative methods and the validation results are interpreted using the hermeneutics method of the interpretivism paradigm. In this chapter, the authors present the relationships that they found most crucial to validate since they have the least literature evidence. With the relationships identified and documented, game developers will have better understanding of the interaction between each element and can produce better models of EG.
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Yan, Wei Qi, Xiaotian Wu, and Feng Liu. "Progressive Scrambling for Social Media." In Censorship, Surveillance, and Privacy. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7113-1.ch106.

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Despite research work achieving progress in preserving the privacy of user profiles and visual surveillance, correcting problems in social media have not taken a great step. The reason is the lack of effective modelling, computational algorithms, and resultant evaluations in quantitative research. In this article, the authors take social media into consideration and link users together under the umbrella of social networks so as to exploit a way that the potential problems related to media privacy could be solved. The author's contributions are to propose tensor product-based progressive scrambling approaches for privacy preservation of social media and apply our approaches to the given social media which may encapsulate privacy before being viewed so as to achieve the goal of privacy preservation in anonymity, diverse and closeness. These approaches fully preserve the media information of the scrambled image and make sure it is able to be restored. The results show the proposed privacy persevering approaches are effective and have outstanding performance in media privacy preservation.
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Camillo, Angelo A., and Loredana Di Pietro. "Social Media and its Effect on Consumer Loyalty." In Handbook of Research on Effective Marketing in Contemporary Globalism. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-6220-9.ch012.

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Due to the increasing number of users and powerful Web-based tools available today on social networks such as Facebook, enterprises are strategically focusing on the marketing opportunities provided by social media. In fact, presence on a social network such as Facebook can provide the firm with a mechanism for gathering consumer information quickly on a wider segment of the population. This chapter investigates the effectiveness of the firm's presence on social networks and their effect on the firm and the consumer. It attempts to identify a possible linkage between a firm's presence on a social network and consumer loyalty by addressing critical elements useful for developing new and efficient strategies based on online channels. The data collected from 1,520 surveying Facebook users was analyzed using the Structural Equation Modelling (SEM) technique. The results suggest there is a strong relationship between the firm's presence on the social network and consumer loyalty, thus contributing to the sustained marketing strategies of “social commerce.” Hence, a page rich in content has a positive influence on consumer judgement and loyalty toward the firm with benefits for consumer-centric-oriented strategies.
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Jain, Somya, and Adwitiya Sinha. "Social Network Analysis." In Advances in Business Information Systems and Analytics. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5097-6.ch001.

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Over the last decade, technology has thrived to provide better, quicker, and more effective platforms to help individuals connect and disseminate information to other individuals. The increasing popularity of these networks and its huge content in the form of text, images, and videos provides new opportunities for data analytics in the context of social networks. This motivates data mining experts and researchers to deploy various mining apparatus and application-specific tools for analysing the massive, intricate, and dynamic social media knowledge. The research detailed in this chapter would entail major social network concepts with data analysis techniques. Moreover, it gives insight to representation and modelling of social networks with research datasets and tools.
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Lo Turco, Massimiliano, and Yoseph Bausola Pagliero. "Representation, Design, and Management of Generative Algorithms for Architecture." In Advances in Media, Entertainment, and the Arts. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3993-3.ch012.

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This chapter critically analyses free-form generative parametric design techniques to evaluate the effectiveness of VPL (Visual Programming Language) systems, applied to existing high-geometric/formal complexity artefacts. The paneling of the South facade of the Institut du Monde Arabe (IMA) in Paris, designed by J. Nouvel, was chosen as a case history. This is to examine how through a complex kinematic modelling, the sunshine of indoor environments can be effectively controlled. The chapter focuses on reproduction, through reverse engineering techniques of the façade-type panel, through the most widely-used VPL platforms that determine algorithmic relationships. The generative parametric algorithms developed for the IMA Moucharabieh, indicate that identical rules can govern different geometries; in contrast, identical geometries can arise from completely different algorithmic formulae. Finally, the integration with the most widely-used BIM applications, is used to critically evaluate interoperable workflows.
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Schmidt, Thomas, and Stephan Hofmann. "The Role of Reference, Imminent and Current Models in Enterprise Conceptual Modelling." In Advances in Human Resources Management and Organizational Development. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8524-6.ch006.

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Enterprise Resource Planning (ERP) systems constitute a prerequisite for successfully managing business in many industries, including the logistics industry. Since today's standard ERP systems determine a company's business down to the smallest detail, effectively aligning a company's strategy and business processes with software-given processes is imperative for maintaining a competitive advantage. This calls for defining an Enterprise Conceptual Model based on a sound derivation of imminent processes, either directed towards current, reference or ideal processes. The case study exemplifies that an Enterprise Conceptual Model has actually helped to translate strategic goals and operational needs into business processes and, thereby, align imminent and software-given processes. The application of current, reference and ideal process models for definition imminent processes is shown. Insight is drawn from a one-case case study of a medium-sized Namibian freight forwarder and logistics service provider.
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Conference papers on the topic "Effective medium modelling"

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Gutiérrez Vela, Yael, Dolores Ortiz, Rodrigo Alcaraz de la Osa, et al. "Modelling metal-dielectric core-shell nanoparticles with effective medium theories." In Third International Conference on Applications of Optics and Photonics, edited by Manuel Filipe P. Martins Costa. SPIE, 2017. http://dx.doi.org/10.1117/12.2272116.

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Wong, D. L. Y., F. Doster, S. Geiger, and A. Kamp. "Hybrid Modelling of Fractured Reservoirs Using the Effective Medium Theory." In Third EAGE Workshop on Naturally Fractured Reservoirs. EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201800029.

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Trifale, Ninad, Kazuaki Yazawa, and Eric Nauman. "Modelling of Effective Thermal Conductance of Metal Foam Contact Thermal Interfaces." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64132.

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We present a modeling study of the effective thermal conductance of metal foams as a thermal interface focusing on the electronics cooling applications. Metal foam material as a porous media has been considered for several applications because of its significantly large surface area for a given volume. In the electronics cooling, aluminum porous heat sinks have been well studied. It is not only cost effective due to the unique production process, but also attractive for the theoretical modeling study to determine the performance. In the past studies, effective thermal conductivity for heat tra
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Adelinet, M., V. Clochard, J. F. Barthlmy, and L. Chrel. "Determination of Crack Orientation in a Fractured Reservoir from Effective Medium Modelling and Multi-azimuth Inversion." In 74th EAGE Conference and Exhibition incorporating EUROPEC 2012. EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20148559.

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Feng, Shangsheng, Tongbeum Kim, and Tianjian Lu. "Compact Modelling of Forced Convection in Pin/Plate-Fin Heat Sinks Subjected to Impinging Jet Heating." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22353.

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Built upon the porous medium approach, a compact model is presented for forced convection in pin and plate fin heat sinks subjected to non-uniform heating. The modified Darcy’s law and the two-equation model are adopted separately to describe fluid flow and heat transfer in the porous model. To take account of heat spreading in the plate-fins and its absence in the pin-fins, the concept of anisotropic effective thermal conductivity is employed in the energy equation for the solid phase. To validate the model, experiments are conducted for both pin- and plate-fin heat sinks and the measured loc
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Hoffmann, Jaap E. "Thermal Radiation in a Packed Bed With Internal Heat Generation." In ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/ht2008-56477.

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Thermal radiation and conduction are the main modes of heat transfer in a packed bed with internal heat generation during a loss of forced cooling incident. Due to the large number of spheres, the only feasible way of treating the bed in Computational Fluid Dynamics is through a porous medium approach. Traditionally, CFD treats a porous medium as a fluid zone, whilst fluid properties are adjusted to account for the presence of the solids. In this work, the bed is treated as a gray gass, emitting and absorbing thermal radiation at the solid temperature. A unit cell approach is used to determine
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Briseghella, Bruno, Valeria Colasanti, Luigi Fenu, Camillo Nuti, Enrico Spacone, and Humberto Varum. "Nonlinear Static Analysis by Finite Elements of a Fujian Hakka Tulou." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1140.

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&lt;p&gt;Hakka Tulous are massive circular earth constructions of the Fujian Province, China, included in the UNESCO World Heritage list. They are subjected to earthquakes of medium magnitude, but their response to the seismic action is not yet investigated in depth. The seismic response of Fujian Tulous was herein investigated through pushover analysis modelling the Tulou structure by finite elements. Although the Tulou is a big construction with a circular earth wall of about fifty meters in diameter, a micromechanical approach was used to model the earth nonlinear behaviour. Even if no bind
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Xia, Qingfeng, David Gillespie, Andrew Owen, and Gervas Franceschini. "Quasi-Static Thermal Modelling of Multi-Scale Sliding Contact for Unlubricated Brush Seal Materials." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75920.

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Prediction of the contact temperature between two materials in high speed rubbing contact is essential when analysing the wear mechanism and modelling wear rate for unlubricated contact. Conventionally the assumptions used for a pin-on-disc configuration are either a steady heat source at the contact for slow speed rotation or an annular source along the rubbing track at high rotating speeds. In this paper, the rotating heating source is solved using an in-house finite element method (FEM) code. This captures the full geometry and rotating speed of the rubbing bodies. The transient heat transf
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Ruskin, Alex, Zak Tahana, Shuhong Chai, Cheslav Balash, Henri Morand, and Cecile Izarn. "On the Effects of Bending Stiffness for Flexible Riser Model Tests." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23423.

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Oil and gas production systems are continually moving into more challenging environments. Therefore having a precise understanding of the flexible pipeline behaviour for various configurations is becoming even more important. This paper presents a medium scale test of a flexible riser in a wave configuration aiming at representing the bending stiffness characteristic of a flexible riser. Results are then compared tothose of a dynamic analysis software to validate the experimental modeling. This paper addresses the problem of scaling a flexible steep wave riser for model tests, where the global
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Rahbar, K., S. Mahmoud, R. K. Al-Dadah, and N. Moazami. "One-Dimensional and Three-Dimensional Numerical Optimization and Comparison of Single-Stage Supersonic and Dual-Stage Transonic Radial Inflow Turbines for the ORC." In ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59508.

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Organic Rankine cycle is one of the most efficient technologies that can utilize low-to-medium grade heat sources and generate useful power. Radial inflow turbine (RIT) is the key component of the ORC and its efficiency has significant effect on the overall cycle performance. Obtaining high cycle thermal efficiency requires large pressure difference (expansion ratio) across the cycle. With the low speed of sound of organic fluids and the high expansion ratios, RIT becomes chocked with supersonic flow regime and shock waves that deteriorate the turbine efficiency and hence reduce the cycle perf
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