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Journal articles on the topic 'Simulation numérique en mécanique des fluides'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

-GRANDEMANGE, C. "Simulation numérique en mécanique des fluides et essais de systèmes aéropropulsifs." Revue de l'Electricité et de l'Electronique -, no. 06 (2001): 31. http://dx.doi.org/10.3845/ree.2001.062.

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2

Chareyron, Delphine, Corinne Fournier, and Jean-Louis Marié. "L’holographie numérique pour la mesure 3D en mécanique des fluides." Photoniques, no. 56 (November 2011): 34–38. http://dx.doi.org/10.1051/photon/20115634.

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3

Besnard, Didier. "La mécanique des fluides numérique outil de recherche, outil industriel ?" Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy 327, no. 4 (April 1999): 359–64. http://dx.doi.org/10.1016/s1287-4620(99)80075-1.

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4

Saint Lèbes, B., R. Moreno, M. Para, M. Chau, A. Negre-Salvayre, J. P. Bossavy, H. Rousseau, and A. Bura-Rivière. "Mécanique des fluides numérique appliquée à l’aorte : vers une imagerie vasculaire fonctionnelle." Journal des Maladies Vasculaires 38, no. 5 (October 2013): 312. http://dx.doi.org/10.1016/j.jmv.2013.07.049.

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5

Béreaux, Y., and J. R. Clermont. "Simulation numérique d'écoulements de fluides viscoélastiques dans des filières axisymétriques." ESAIM: Proceedings 2 (1997): 153–64. http://dx.doi.org/10.1051/proc:1997004.

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6

Fayolle, Yannick, Alain Héduit, Sylvie Gillot, and Arnaud Cockx. "La mécanique des fluides numérique appliquée à l'optimisation du transfert d'oxygène dans les bassins d'aération." Sciences Eaux & Territoires Numéro 9, no. 4 (2012): 72. http://dx.doi.org/10.3917/set.009.0072.

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7

Moreau, René. "La mécanique des fluides numérique Conférence-débat organisée par l'Académie des sciences le 28 septembre 1998." Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy 327, no. 4 (April 1999): 319–24. http://dx.doi.org/10.1016/s1287-4620(99)80071-4.

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8

Quantin, M., C. Morio, G. Guibu Pereira, J. Vazquez, J. Wertel, S. Isel, S. Galuola, and J. Buche. "Calibration numérique 3D de vannes basculantes pour la mesure du débit déversé." Techniques Sciences Méthodes, no. 5 (May 2019): 89–100. http://dx.doi.org/10.1051/tsm/201905089.

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Un des objectifs principaux de l’arrêté du 21 juillet 2015 est de limiter les déversements non contrôlés du réseau d’assainissement vers le milieu naturel. Certaines collectivités, telles qu’Orléans Métropole, ont mis en place des vannes à basculement sur les conduites exutoires de leurs déversoirs afin de maximiser le stockage en réseau et de retarder ainsi les déversements d’eau vers le milieu naturel. Le présent travail consiste à concilier l’usage de ce type de vanne avec l’obligation d’autosurveillance, induite par le même arrêté, en élaborant une loi de calibration. Après une caractérisation du fonctionnement hydraulique de ce type de vanne, notamment en écartant l’influence du poids de la vanne et du clapet antiretour, une approche 1D, basée sur le couplage d’une loi d’orifice et d’un calcul de courbe de remous à charge spécifique constante, est proposée avant d’être validée par modélisation 3D avec un logiciel de mécanique des fluides numérique. Enfin, l’article conclut sur la proposition d’un dispositif de mesure adapté à ce type de vanne, composé d’une sonde à ultrasons en amont et d’un détecteur de basculement sur la vanne, et à un calcul de l’incertitude assortie à l’évaluation du débit, environ 20%.

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9

Béreaux, Y., J. R. Clermont, and A. Yassine. "Algorithme de région de confiance pour la simulation numérique d'écoulements de fluides viscoélastiques." ESAIM: Proceedings 2 (1997): 225–33. http://dx.doi.org/10.1051/proc:1997005.

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10

Larrarte, Frédérique, Matthieu Dufresne, Emmanuel Mignot, Gislain Lipeme Kouyi, Nicolas Riviere, José Vazquez, and Claude Joannis. "Débitmètrie et mécanique des fluides numérique : contribution à l'évaluation et à la réduction des incertitudes des mesures de vitesse moyenne." La Houille Blanche, no. 6 (December 2017): 67–72. http://dx.doi.org/10.1051/lhb/2017060.

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11

Prudent, O. "Simulation numérique du confort de sièges d'automobiles : comportement mécanique 3D de mousses de polyuréthanne ; optimisation 2D d'un profil simplifié de siège." Mécanique & Industries 1, no. 5 (October 2000): 511–20. http://dx.doi.org/10.1016/s1296-2139(00)00103-2.

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12

GRONDIN, Frédéric. "Approche multi-échelles au comportement thermo-hygro-mécanique des milieux poreux par simulation numérique dans Symphonie; application aux problèmes de gel-dégel dans les bétons." Revue Française de Génie Civil 8, no. 1 (January 2004): 114. http://dx.doi.org/10.1080/12795119.2004.9692575.

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13

Markiewicz, E. "Expérimentation et simulation numérique locale/globale de la tenue mécanique des assemblages soudés par pointsExperimental and local/global numerical characterization of mechanical strength for spot-welded assemblies." Mécanique & Industries 4, no. 1 (February 2003): 17–27. http://dx.doi.org/10.1016/s1296-2139(02)00004-0.

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14

Naceur, Selmi, and Bel Hadj Salah Hedi. "Finite Element and Experimental Investigation of the Multipoint Flexible Hydroforming." Key Engineering Materials 554-557 (June 2013): 1290–97. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1290.

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FINITE ELEMENT AND EXPERIMENTAL INVESTIGATIONS OF THE MULTI-POINT FLEXIBLE HYDOFORMING. N. Selmi*, H. BelHadjSalah* *Mechanical Engineering Laboratory (LGM), National Engineering School of Monastir (ENIM), University of Monastir, Avenue Ibn El Jazzar 5019, Monastir, Tunisia. naselmi2002@yahoo.fr, hedi.belhadjsalah@enim.rnu.tn. ABSTRACT Multi-point flexible forming (MPF) process is relatively recent flexible techniques [1], instead of the conventional fixed shape die sets, the basic idea in this process, consist to form the sheet metal between a pair of opposed matrices of punch elements, by adjusting the height of the punch elements [2]. Production of many parts with different geometry will be possible, just by using one same device and the need to design and manufacturing of various dies will be avoided that lead to great saving in time and manufacturing cost specially in the field of small batch or single production. The hydroforming process is attractive compared with conventional solid die forming processes, the basic idea consist to suppress one tool of two forming tools (punch or die), which is replaced by hydraulic pressure, only one tool is necessary to define the final shape of formed sheet. The multipoint flexible hydroforming, proposed in this paper, is an original process which combines the hydroforming and the multipoint flexible forming [3], to obtain a synergy of the advantages of both processes. The new process, subject of this work, is a combination of the last described processes that keep the whole flexibility of the basic multipoint flexible forming (with two dies), by using, only at one side, a single multipoint die to perform completely the final part shape, the fluid pressure is applied on the other side of the sheet metal part and substitutes advantageously the second die. Firstly, investigations were carried out by numerical simulation, to quantify, the effect of the most influent parameters on the process performances, and to highlight the ability of this new process, in the production of complex forms, as well as its contribution in quality, placed with regards existing flexible processes. Secondly, to prove the feasibility and to carry out a valuable experimental investigation of the multipoint flexible hydroforming, an experimental prototype was designed and realized, and successful doubly curved shell shape parts were obtained by the new process testing set up. The part profiles and the thickness distribution were in agreement with those obtained by numerical investigation furthermore, numerical investigation for efficient methods to suppress the dimpling phenomenon and edge buckling were confirmed by experimental investigation. From investigations it appears that the parameters attached to the discreet character of the multipoint tool, have an important effect on the quality of the final metal sheet product, such as, the punch elements density, the punch elements extremity curvature radius, the blank and the elastomeric interpolator thicknesses. From simulation results, it emerges essentially, that an adequate setting of parameters can upgrade the thickness distribution, reduce the residual stress and attenuate the dimples. References: [1] Zhong-Yi Cai, Shao-Hui Wanga, Ming-Zhe Li, (2008), Numerical investigation of multi-point forming process for sheet metal: wrinkling, dimpling and spring back, Int J Adv Manuf Technol (2008) 37:927–936. [2] Zhong-Yi Cai, Shao-Hui Wang, Xu-Dong Xu, Ming-Zhe Li (2009), Numerical simulation for the multi-point stretch forming process of sheet metal, journal of materials processing technology 209 (2009) 396–407. [3] N. Selmi, H. Bel hadj salah, Simulation numérique de l’hydroformage à matrice flexible, 7éme journées scientifiques en mécanique et matériaux JSTMM2010, Hammamet 26-27 novembre2010.

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15

Marouf, Abderahmane, Yannick Bmegaptche Tekap, Nikolaos Simiriotis, Jean-Baptiste Tô, Jean-François Rouchon, Yannick Hoarau, and Marianna Braza. "Numerical investigation of frequency-amplitude effects of dynamic morphing for a high-lift configuration at high Reynolds number." International Journal of Numerical Methods for Heat & Fluid Flow ahead-of-print, ahead-of-print (November 29, 2019). http://dx.doi.org/10.1108/hff-07-2019-0559.

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Purpose The purpose of this study illustrates the morphing effects around a large-scale high-lift configuration of the Airbus A320 with two elements airfoil-flap in the take-off position. The flow around the airfoil-flap and the near wake are analysed in the static case and under time-dependent vibration of the flap trailing-edge known as the dynamic morphing. Design/methodology/approach Experimental results obtained in the subsonic wind tunnel S1 of Institut de Mécanique des Fluides de Toulouse of a single wing are discussed with high-fidelity numerical results obtained by using the Navier–Stokes multi-block (NSMB) code with advanced turbulent modelling able to capture the predominant instabilities and coherent structure dynamics. An explanation of the dynamic time-dependent grid deformation is provided, which is used in the NSMB code to simulate the flap’s trailing-edge deformation in the morphing configuration. Finally, power spectral density is performed to reveal the coherent wake structures and their modification because of the morphing. Findings Frequency of vibration and amplitude of deformation effects are investigated for different morphing cases. Optimal morphing regions at a specific frequency and a slight deformation were able to attenuate the predominant natural shear-layer frequency and to considerably decrease the width of the von Kármán vortices with a simultaneous increase of aerodynamic performances. Originality/value The new concept of future morphed wings is proposed for a large scale A320 prototype at the take-off position. The dynamic morphing of the flap’s trailing-edge is simulated for the first time for high-lift two-element configuration. In addition, the wake analysis performed helped to show the turbulent structures according to the organised eddy simulation model.

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