Готові списки джерел за темами / Reconstruction et simulations de flux

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  3. Частини книг
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Добірка наукової літератури з теми "Reconstruction et simulations de flux"

Автор: Grafiati
Опубліковано: 25 січня 2025
Оновлено: 31 липня 2025

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Статті в журналах з теми "Reconstruction et simulations de flux"

1

Matringe, Sebastien F., Ruben Juanes, and Hamdi A. Tchelepi. "Tracing Streamlines on Unstructured Grids From Finite Volume Discretizations." SPE Journal 13, no. 04 (2008): 423–31. http://dx.doi.org/10.2118/103295-pa.

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Summary The accuracy of streamline reservoir simulations depends strongly on the quality of the velocity field and the accuracy of the streamline tracing method. For problems described on complex grids (e.g., corner-point geometry or fully unstructured grids) with full-tensor permeabilities, advanced discretization methods, such as the family of multipoint flux approximation (MPFA) schemes, are necessary to obtain an accurate representation of the fluxes across control volume faces. These fluxes are then interpolated to define the velocity field within each control volume, which is then used t
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2

Zerrik, E., and H. Bourray. "Flux reconstruction: sensors and simulations." Sensors and Actuators A: Physical 109, no. 1-2 (2003): 34–46. http://dx.doi.org/10.1016/s0924-4247(03)00358-3.

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3

Khazari, Adil, and Ali Boutoulout. "Flux reconstruction for hyperbolic systems: Sensors and simulations." Evolution Equations & Control Theory 4, no. 2 (2015): 177–92. http://dx.doi.org/10.3934/eect.2015.4.177.

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4

Jessen, Kristian, Margot G. Gerritsen, and Bradley T. Mallison. "High-Resolution Prediction of Enhanced Condensate Recovery Processes." SPE Journal 13, no. 02 (2008): 257–66. http://dx.doi.org/10.2118/99619-pa.

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Summary This paper investigates the accuracy of first- and high-order numerical methods in simulating enhanced condensate processes in 1D, 2D, and 3D. We compare the predictions of a standard single point upwind (SPU) scheme with a third-order accurate finite difference (FD) simulator based on a third-order essentially nonoscillatory (ENO) flux reconstruction with matching temporal accuracy. We include physical dispersion in the mathematical model of these multiphase, multicomponent systems. The comparisons demonstrate that SPU schemes may fail to predict the formation of the mobile liquid ban
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5

Török, T., M. G. Linton, J. E. Leake, et al. "Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope." Astrophysical Journal 962, no. 2 (2024): 149. http://dx.doi.org/10.3847/1538-4357/ad1826.

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Abstract Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which such eruptions occur. These simulations to date have modeled filament channels as 2D flux ropes or 3D uniformly sheared arcades. Here we present MHD simulations of flux emergence into a more realistic configuration consisting of a bipolar active region containing a line-tied 3D flux rope. We use the coronal flux-rope model of Titov et al.
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6

Trojak, W., N. R. Vadlamani, J. Tyacke, F. D. Witherden, and A. Jameson. "Artificial compressibility approaches in flux reconstruction for incompressible viscous flow simulations." Computers & Fluids 247 (October 2022): 105634. http://dx.doi.org/10.1016/j.compfluid.2022.105634.

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7

Ding, Yan, Sung-Chan Kim, Richard B. Styles, and Rusty L. Permenter. "SIMULATION OF LONG-TERM SHORELINE CHANGE DRIVEN BY LONGSHORE AND CROSS-SHORE SEDIMENT TRANSPORT." Coastal Engineering Proceedings, no. 36v (December 28, 2020): 31. http://dx.doi.org/10.9753/icce.v36v.sediment.31.

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Анотація:
Driven by wave and current, sediment transport alongshore and cross-shore induces shoreline changes in coasts. Estimated by breaking wave energy flux, longshore sediment transport in littoral zone has been studied for decades. Cross-shore sediment transport can be significant in a gentle-slope beach and a barred coast due to bar migration. Short-term beach profile evolution (typically for a few days or weeks) has been successfully simulated by reconstructing nonlinear wave shape in nearshore zone (e.g. Hsu et al 2006, Fernandez-Mora et al. 2015). However, it is still lack of knowledge on the r
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Huang, Lawrence, Rupert A. C. Croft та Hitesh Arora. "Deep forest: Neural network reconstruction of the Lyman-α forest". Monthly Notices of the Royal Astronomical Society 506, № 4 (2021): 5212–22. http://dx.doi.org/10.1093/mnras/stab2041.

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ABSTRACT We explore the use of Deep Learning to infer physical quantities from the observable transmitted flux in the Ly α forest. We train a Neural Network using redshift z = 3 outputs from cosmological hydrodynamic simulations and mock data sets constructed from them. We evaluate how well the trained network is able to reconstruct the optical depth for Ly α forest absorption from noisy and often saturated transmitted flux data. The Neural Network outperforms an alternative reconstruction method involving log inversion and spline interpolation by approximately a factor of 2 in the optical dep
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9

Zunz, V., and H. Goosse. "Influence of freshwater input on the skill of decadal forecast of sea ice in the Southern Ocean." Cryosphere 9, no. 2 (2015): 541–56. http://dx.doi.org/10.5194/tc-9-541-2015.

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Abstract. Recent studies have investigated the potential link between the freshwater input derived from the melting of the Antarctic ice sheet and the observed recent increase in sea ice extent in the Southern Ocean. In this study, we assess the impact of an additional freshwater flux on the trend in sea ice extent and concentration in simulations with data assimilation, spanning the period 1850–2009, as well as in retrospective forecasts (hindcasts) initialised in 1980. In the simulations with data assimilation, the inclusion of an additional freshwater flux that follows an autoregressive pro
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10

Liu, Chunlei, and Richard P. Allan. "Unrealistic Increases in Wind Speed Explain Reduced Eastern Pacific Heat Flux in Reanalyses." Journal of Climate 31, no. 8 (2018): 2981–93. http://dx.doi.org/10.1175/jcli-d-17-0642.1.

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Abstract Tropical eastern Pacific sea surface temperature plays a pivotal role in mechanisms that determine global mean surface temperature variability. In this study, the surface flux contribution to recent cooling of the tropical eastern Pacific is investigated using data from three atmospheric reanalyses with full assimilation of observations, an observation-based net surface energy flux reconstruction, and 15 atmosphere-only climate model simulations. For ERA-Interim, 78% of the decrease in net surface flux (−0.65 W m−2 yr−1 over 1988–2008) is explained by the latent heat flux variability.
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Дисертації з теми "Reconstruction et simulations de flux"

1

Negre, Delphine. "Rationalisation de l’Accès aux Produits Naturels Fongiques par une Approche OSMAC in silico : Cas d’étude avec la modélisation du métabolisme de Penicillium rubens." Electronic Thesis or Diss., Nantes Université, 2024. http://www.theses.fr/2024NANU4038.

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Face à la résistance accrue aux antibiotiques menaçant la santé publique, la prospection de nouvelles molécules biologiquement actives est pressante. Les champignons filamenteux se distinguent par leur capacité à synthétiser une large gamme de produits naturels, sous l’influence de clusters de gènes biosynthétiques (BGC) qui orchestrent la production de métabolites spécialisés. Toutefois, de nombreux produits issus de ces BGCs n’ont pas encore été caractérisés et leur chimiodiversité demeure sous-explorée en raison de l’incapacité à activer l’ensemble de leur potentiel en laboratoire. L’approc
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2

Delestre, Olivier. "Simulation du ruissellement d'eau de pluie sur des surfaces agricoles." Phd thesis, Université d'Orléans, 2010. http://tel.archives-ouvertes.fr/tel-00587197.

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Анотація:
L'objectif de ce travail est le développement d'un modèle et d'une méthode numérique adaptés à la simulation du ruissellement d'eau de pluie sur des surfaces agricoles. Pour cela, nous utilisons un système d'équations aux dérivées partielles pour les eaux peu profondes : le système de Saint Venant. La pluie et l'infiltration y sont pris en compte par l'ajout de termes source et le couplage avec un modèle d'infiltration. Le système étant hyperbolique et conservatif nous choisissons d'utiliser un schéma aux volumes finis avec reconstruction hydrostatique. Avec cette reconstruction nous obtenons
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3

Ntemos, George. "GPU-accelerated high-order scale-resolving simulations using the flux reconstruction approach." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/59135.

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High-order methods in Computational Fluid Dynamics (CFD) offer a potential route towards the resolution of hitherto intractable fluid-dynamics problems in industry. The Flux Reconstruction (FR) approach provides a unifying framework for a number of popular high-order methods such as the Discontinuous Galerkin (DG). Its suitability for use on unstructured grids along with its ability to facilitate massively parallelised implementation on architectures such as GPUs provide a means to tackle computationally challenging flows around complex geometries. Such a flow can be found in the rod-aerofoil
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4

Ridel, Mélissa. "Reconstruction du flux d'énergie et recherche de squarks et gluinos dans l'expérience D0." Phd thesis, Université Paris Sud - Paris XI, 2002. http://tel.archives-ouvertes.fr/tel-00002927.

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DO est l'une des 2 expériences du collisionneur p-pbar du Fermi National Accelerator Laboratory près de Chicago. Après 5 années d'arrêt, le Run II a débuté en mars 2001. Il permettra d'explorer de nouveaux domaines de masses de squarks et de gluinos, particules supersymétriques dont la signature en jets et énergie transverse manquante est l'objet de ce travail. Mais, avant le démarrage, j'ai travaillé sur des améliorations hardware et software de la mesure de l'énergie, essentielle pour les jets et l'énergie transverse manquante.<br> Une simulation des chaînes de lecture et de calibration de c
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Ridel, Mélissa. "Reconstruction du flux d'énergie et recherche de squarks et gluinos dans l'expérience DØ." Paris 11, 2002. http://www.theses.fr/2002PA112101.

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Анотація:
DØ est l'une des 2 expériences du collisionneur pp ̃du Fermi National Accelerator Laboratory près de Chicago. Après 5 années d'arrêt, le Run II a débuté en mars 2001. Il permettra d'explorer de nouveaux domaines de masses de squarks et de gluinos, particules supersymétriques dont la signature en jets et énergie tranverse manquante est l'objet de ce travail. Mais, avant le démarrage, j'ai travaillé sur des améliorations hardware et software de la mesure de l'énergie, essentielle pour les jets et l'énergie transverse manquante. Une simulation des chaînes de lecture et de calibration de chaque vo
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6

Marchand, Mathieu. "Flux financiers et endettement de l'État : simulations par modèle d'équilibre général calculable (MEGC)." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24520/24520.pdf.

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Décossin, Étienne. "Ébullition et assèchement dans un lit de particules avec production interne de chaleur : premières expériences et simulations numériques en situation multidimensionnelle." Toulouse, INPT, 2000. http://www.theses.fr/2000INPT004H.

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Dans le contexte des études sur les accidents graves dans les centrales nucléaires, la démonstration de la capacité de refroidissement des lits de particules de corium, matériau résultant de la fusion du coeur et véhiculant la puissance résiduelle, est d'une grande importance. De nombreux travaux expérimentaux, essentiellement 1D, ont démontré l'existence d'un flux critique d'assèchement au-delà duquel le refroidissement des particules par l'ébullition de l'eau interstitielle n'est plus assuré. L'interprétation et la modélisation du phénomène reposent sur l'équation hydrodynamique d'Ergun, ada
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8

Didorally, Sheddia. "Prévision des flux de chaleur turbulents et pariétaux par des simulations instationnaires pour des écoulements turbulents chauffés." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0015/document.

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Анотація:
Cette thèse s’inscrit dans le cadre de l’amélioration des prévisions aérothermiques qui suscite l’intérêt croissant des industriels aéronautiques. Elle consiste à évaluer l’apport des méthodes URANS avancées de type SAS dans la prévision des flux de chaleur turbulents et pariétaux pour des écoulements turbulents chauffés. Elle vise aussi à situer ces approches par rapports aux modèles URANS classiques de type DRSM et hybrides RANS/LES comme la ZDES. Une extension de l’approche SAS à un modèle DRSM a d’abord été proposé afin d’obtenir une meilleure restitution des tensions de Reynolds résolues
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9

Frasson, Thomas. "Flux de chaleur hétérogène dans des simulations de convection mantellique : impact sur la géodynamo et les inversions magnétiques." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU027.

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Анотація:
Le champ magnétique terrestre est généré par la convection du fer liquide dans le noyau, éléctriquementconducteur, produisant un effet dynamo. Ce processus, appelé géodynamo, maintientun champ magnétique depuis des milliards d’années. Les données paléomagnétiques montrent quele comportement de la géodynamo a changé au cours des temps géologiques. Ces changementsde comportement sont visibles à travers les variations de l’amplitude et de la stabilité du dipôlemagnétique. Les variations du flux de chaleur à la limite entre le noyau et le manteau (CMB) duesà la convection mantellique ont été suggé
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10

Solminihac, Florence de. "Effets de perturbations magnétiques sur la dynamique de la barrière de transport dans un Tokamak : modélisation et simulations numériques." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4743/document.

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Анотація:
Dans cette thèse nous étudions l'impact de perturbations magnétiques résonnantes sur la dynamique de la barrière de transport dans un tokamak. Pour cela nous avons réalisé des simulations numériques tridimensionnelles de turbulence dans le plasma de bord du tokamak. Nos simulations numériques ont reproduit les résultats expérimentaux observés dans différents tokamaks. Dans le régime de confinement amélioré (mode H), la barrière de transport n'est pas stable : elle effectue des oscillations de relaxation, qui partagent des caractéristiques communes avec les "modes localisés au bord'' (Edge Loca
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Частини книг з теми "Reconstruction et simulations de flux"

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Yang, Qing-Qing, Jiu Luo, Dong-Chuan Mo, Shu-Shen Lyu, and Yi Heng. "Fast Reconstruction of Transient Heat-Flux Distributions in a Laser Heating Process with Time-Space Adaptive Mesh Refinement." In Computational and Experimental Simulations in Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27053-7_103.

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2

Goffart, Nicolas, Benoît Tartinville, and Sergio Pirozzoli. "From High-Fidelity High-Order to Reduced-Order Modeling for Unsteady Shock Wave/Boundary Layer Interactions." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86605-0_2.

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Abstract To design the next-generation aircraft and engines, efficient numerical tools need to be developed. Shock wave/boundary layer interactions are indeed putting the current industrial methods to the test: high-order methods lack robustness while modeling assumptions in low-fidelity methods make them not accurate enough. This work presents the first steps toward improving turbulence modeling in harmonic methods for shock-induced separated flows in turbomachinery applications, using high-fidelity data. A high-order solver based on the flux reconstruction framework is employed for performin
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3

Gao Yunlai, Wang Ping, and Tian Guiyun. "Numerical simulation of magnetic flux leakage for crack geometrical characterization based on spatial magnetic field vectors." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-509-8-125.

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Prediction and characterization of irregular crack geometrical characters from detection signals are major challenges for electromagnetic non-destructive evaluation (ENDE). In this paper, a new approach using spatial leakage magnetic field vectors in three mutually perpendicular coordinate planes is proposed for characterization of crack geometrical features considering defect surface profile, orientation and propagation angles. New signal features of B&amp;alpha;, B&amp;beta;and B&amp;gamma;extracted from leakage magnetic field in three coordinate planes of X-Y, X-Z and Y-Z are provided to im
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4

F. dos Santos, Jhennifer, Yasmim M.D. Lisboa, Elielson F.S. Barbosa, et al. "Motor Monitoring and Analysis System (SMAM) as a Resource for Predictive Maintenance in Industrial Environments through Digital Twin and IIoT." In Induction Motors - Latest Research and Applications [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1006914.

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The Motor Monitoring and Analysis System (SMAM) was developed as a tool that can help with the predictive maintenance of electric motors through Digital Twin (DT) and the Industrial Internet of Things (IIoT). To do this, SMAM has an embedded system made up of the ESP32 microcontroller and temperature, voltage and current sensors, in which the measurements taken are stored in the Firebase web database. It is worth noting that the sensors are calibrated using the least squares and linear regression mathematical methods, as well as using the ET-5062 energy analyzer as a reference to ensure that t
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5

Rubin, Yoram. "Upscaling, Computational Aspects, and Statistics of the Velocity Field." In Applied Stochastic Hydrogeology. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195138047.003.0011.

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Анотація:
This chapter deals with computing the velocity fields in heterogeneous media. This is a broad area, and we shall concentrate here on upscaling, on the spatial correlation pattern of the velocity, and on accuracy measures for techniques that compute velocity fields. Numerical simulations of velocity fields in heterogeneous media (Ababou et al., 1988, 1989; Bellin et al., 1992, 1994; Bellin and Rubin, 1996; Dykaar and Kitandis, 1992a,b; Hassan et al., 1998a,b; Salandin and Fiorotto, 1998) indicate that to capture accurately the effects of the spatial variability of the conductivity on the veloci
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Тези доповідей конференцій з теми "Reconstruction et simulations de flux"

1

Öhrle, Constantin, Ulrich Schäferlein, Manuel Keßler, and Ewald Krämer. "Higher-order Simulations of a Compound Helicopter using Adaptive Mesh Refinement." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0074-2018-12713.

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Higher-order methods and adaptive mesh refinement (AMR) have demonstrated their added value to numerical simulation of a variety of aerodynamic problems, including rotorcraft flow. Within this paper, the implementation of a higher-order spatial WENO (Weighted Essentially Non-Oscillatory) method for flux reconstruction and an AMR method for grid refinement into a comprehensive and approved rotorcraft simulation framework is discussed. A significant increase in computational efficiency by factor 15 can be achieved using higher-order methods. AMR allows a considerable reduction of required overal
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2

Le Bras, Sophie, Hugues Deniau, and Christophe Bogey. "A flux reconstruction technique for non-conforming grid interfaces in aeroacoustic simulations." In 22nd AIAA/CEAS Aeroacoustics Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-2972.

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3

Miyaji, Koji. "On the Compressible Flow Simulations with Shocks by a Flux Reconstruction Approach." In 20th AIAA Computational Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-3057.

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4

Gnoffo, Peter. "Updates to Multi-Dimensional Flux Reconstruction for Hypersonic Simulations on Tetrahedral Grids." In 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-1271.

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LU, Yi, and William N. Dawes. "Large Eddy Simulations using High order Flux Reconstruction method on Hybrid Unstructured meshes." In 52nd Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-0424.

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Lu, Yi, Kai Liu, and W. N. Dawes. "Large Eddy Simulations for 3D Turbine Blades Using a High Order Flux Reconstruction Method." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94707.

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Анотація:
During the last decades, the improvements of both computational ability and numerical schemes have stimulated increasing industrial interest in the use of Large Eddy Simulations (LES) for practical engineering flow problems. However, almost all current approches cannot treat complex geometries at affordable cost to enable LES of industrial problems. A robust, parallel and efficient solver using a general unstructured grid &amp; based on high order flux reconstruction formulation, which uses local reconstruction, is compact and written in differential form without a mass matrix, was developed a
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7

Spiegel, Seth C., Michael R. Borghi, and Dennis A. Yoder. "Large Eddy Simulations of a Single-Injector Cooling Flow Using the High-Order Flux Reconstruction Method." In AIAA SCITECH 2022 Forum. American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-1813.

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Lu, Yi, Xin Yuan, and W. N. Dawes. "Investigation of 3D Internal Flow Using New Flux-Reconstruction High Order Method." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69270.

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Анотація:
The new godunov-type high order method via flux-reconstruction, are capable of unifiying several popular methods including the discontinuous Galerkin, staggered-grid multi-domain method, or the spectral difference/spectral volume methods into a single family. Compared to discontinuous galerkin method, this new method retain the arbitrary order and compact properties but written in differential form and without mass matrix. The flux-reconstrcution method using general unstructured 2D/3D mesh including triangles, quadrilaterals, tetrahedrons, pyramids, prisms and hexahedrons are implemented. Com
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Poe, Nicole M. W., and D. Keith Walters. "A Non-Local Convective Flux Limiter for Upwind-Biased Finite Volume Simulations." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30752.

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Анотація:
Finite volume methods on structured and unstructured meshes often utilize second-order, upwind-biased linear reconstruction schemes to approximate the convective terms, in an attempt to improve accuracy over first-order methods. Limiters are employed to reduce the inherent variable over- and under-shoot of these schemes; however, they also can significantly increase the numerical dissipation of a solution. This paper presents a novel non-local, non-monotonic (NLNM) limiter developed by enforcing cell minima and maxima on dependent variable values projected to cell faces. The minimum and maximu
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10

Zhang, N., Z. Li, Y. Zhao, J. Wu, S. Wang, and X. Wang. "Advancements in CT Three-Dimensional Reconstruction of Rock Samples." In International Geomechanics Conference. ARMA, 2024. https://doi.org/10.56952/igs-2024-0295.

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Анотація:
ABSTRACT: Understanding the internal discontinuities, joints, and fissures within rock samples is crucial across multiple engineering fields, including geotechnical engineering and energy exploration. Computed tomography (CT) technology, with its non-destructive and high-resolution capabilities, has become indispensable for studying rock internal structures, overcoming the limitations of traditional methods such as mercury intrusion porosimetry, scanning electron microscopy, and nuclear magnetic resonance. This paper reviews the recent progress in the application of CT for three-dimensional (3
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Звіти організацій з теми "Reconstruction et simulations de flux"

1

Ridel, Melissa. Reconstruction du Flux d'Energie et Recherche de Squarks et Gluinos dans l'Experience D0. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/1420957.

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