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642 results on '"Periaux, J."'

2. Pointwise control of the Burgers equation and related Nash equilibrium problems: Computational approach

Author

Ramos del Olmo, Ángel Manuel, Glowinski, R., Periaux, J., Ramos del Olmo, Ángel Manuel, Glowinski, R., and Periaux, J.

Abstract

This article is concerned with the numerical solution of multiobjective control problems associated with nonlinear partial differential equations and more precisely the Burgers equation. For this kind of problems, we look for the Nash equilibrium, which is the solution to a noncooperative game. To compute the solution of the problem, we use a combination of finite-difference methods for the time discretization, finite-element methods for the space discretization, and a quasi-Newton BFGS algorithm for the iterative solution of the discrete control problem. Finally, we apply the above methodology to the solution of several tests problems. To be able to compare our results with existing results in the literature, we discuss first a single-objective control problem, already investigated by other authors. Finally, we discuss the multiobjective case., Universidad Complutense de Madrid, Texas Higher Education Coordinating Board, DGES, Depto. de Análisis Matemático y Matemática Aplicada, Fac. de Ciencias Matemáticas, Instituto de Matemática Interdisciplinar (IMI), TRUE, pub

Published
2023

3. Nash equilibria for the multiobjective control of linear partial differential equations

Author

Ramos del Olmo, Ángel Manuel, Glowinski, R., Periaux, J., Ramos del Olmo, Ángel Manuel, Glowinski, R., and Periaux, J.

Abstract

This article is concerned with the numerical solution of multiobjective control problems associated with linear partial differential equations. More precisely, for such problems, we look for the Nash equilibrium, which is the solution to a noncooperative game. First, we study the continuous case. Then, to compute the solution of the problem, we combine finite-difference methods for the time discretization, finite-element methods for the space discretization, and conjugate-gradient algorithms for the iterative solution of the discrete control problems. Finally, we apply the above methodology to the solution of several tests problems., DGES, Depto. de Análisis Matemático y Matemática Aplicada, Fac. de Ciencias Matemáticas, Instituto de Matemática Interdisciplinar (IMI), TRUE, pub

Published
2023

4. Evolutionary Algorithms for Multi-Objective Design Optimization

Author

Sefrioui, M., Whitney, E., Periaux, J., Srinivas, K., Hirschel, E. H., editor, Fujii, K., editor, Haase, W., editor, van Leer, B., editor, Leschziner, M. A., editor, Pandolfi, M., editor, Periaux, J., editor, Rizzi, A., editor, Roux, B., editor, Barton, Noel G., editor, and Periaux, Jacques, editor

Published
2003
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8. Evolutionary Optimisation Methods with Uncertainty for Modern Multidisciplinary Design in Aeronautical Engineering

Author

Lee, D. S., Gonzalez, L. F., Périaux, J., Srinivas, K., Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Shokin, Yurii I., editor, and Krause, Egon, editor

Published
2009
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9. Golden Age of French CFD in the 1970-80s: Aerodynamics with Finite Elements and the European Multi-Physics HERMES Program

Author

Periaux, J., Pironneau, O., Perrier, P., Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Shokin, Yurii I., editor, and Krause, Egon, editor

Published
2009
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15. Domain Embedding/Controllability Methods for the Conjugate Gradient Solution of Wave Propagation Problems

Author

Chen, H.Q., Glowinski, R., Periaux, J., Toivanen, J., Barth, Timothy J., editor, Griebel, Michael, editor, Keyes, David E., editor, Nieminen, Risto M., editor, Roose, Dirk, editor, Schlick, Tamar, editor, Kornhuber, Ralf, editor, Hoppe, Ronald, editor, Périaux, Jacques, editor, Pironneau, Olivier, editor, Widlund, Olof, editor, and Xu, Jinchao, editor

Published
2005
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21. Contributions of Prof. Satofuka to Computational Fluid Dynamics

Author

Hafez, M., Morinishi, K., Periaux, J., Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Hafez, Mohamed, and Morinishi, Koji

Published
2001
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22. Drag reduction by active control for flow past cylinders

Author

He, J.-W., Chevalier, M., Glowinski, R., Metcalfe, R., Nordlander, A., Periaux, J., Burkard, Rainer E., editor, Jameson, Antony, editor, Strang, Gilbert, editor, Deuflhard, Peter, editor, Lions, Jacques-Louis, editor, Capasso, Vincenzo, editor, Periaux, Jacques, editor, and Engl, Heinz W., editor

Published
2000
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23. Contributions to the Resolution of the Data Workshop Test Cases

Author

Fol, Thierry, Selmin, V., Alonso, J. M., de la Viuda, J. M., Abbas, A., Fornasier, Luciano, Schwarten, Helmuth, Periaux, J., Stoufflet, B., Bock, K.-W., Haase, W., Le Tallec, Patrick, Pironneau, Olivier, Dervieux, Alain, Marco, Nathalie, Malé, Jean-Michel, Labrujère, Th. E., Kuiper, H., van der Wees, A. J., Hendriks, C. F. W., Chaviaropoulos, P., Dedoussis, V., Papailiou, K. D., Bugeda, G., Oñate, E., Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Periaux, Jacques, editor, Bugeda, Gabriel, editor, Chaviaropoulos, Panagiotis K., editor, Giannakoglou, Kyriakos, editor, Lanteri, Stephane, editor, and Mantel, Bertrand, editor

Published
1998
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24. Contribution to Problems T4 and T6 Finite Element GMRES and Conjugate Gradient Solvers

Author

Dinh, Q. V., Mantel, B., Periaux, J., Stoufflet, B., Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Periaux, Jacques, editor, Bugeda, Gabriel, editor, Chaviaropoulos, Panagiotis K., editor, Labrujere, Theo, editor, and Stoufflet, Bruno, editor

Published
1997
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38. Robust multidisciplinary unmanned aerial system design optimisation

Author

Lee, DongSeop, Periaux, J, González, Luis, Srinivas, Karkenahalli, and Oñate, Eugenio

Subjects
Engineering, Manufacturing, Engineering, Mechanical, Engineering, Civil, Engineering, Industrial, Engineering, Multidisciplinary, Engineering, Ocean, Computer Science, Software Engineering, Engineering, Aerospace, Engineering, Biomedical, Engineering, Marine
Abstract

There are many applications in aeronautical/aerospace engineering where some values of the design parameters/states cannot be provided or determined accurately. These values can be related to the geometry (wingspan, length, angles) and or to operational flight conditions that vary due to the presence of uncertainty parameters (Mach, angle of attack, air density and temperature, etc.). These uncertainty design parameters cannot be ignored in engineering design and must be taken into the optimisation task to produce more realistic and reliable solutions. In this paper, a robust/uncertainty design method with statistical constraints is introduced to produce a set of reliable solutions which have high performance and low sensitivity. Robust design concept coupled with Multi-Objective Evolutionary Algorithms (MOEAs) is defined by applying two statistical sampling formulas; mean and variance/standard deviation associated with the optimisation fitness/objective functions. The methodology is based on a canonical evolution strategy and incorporates the concepts of hierarchical topology, parallel computing and asynchronous evaluation. It is implemented for two practical Unmanned Aerial System (UAS) design problems; the first case considers robust multi-objective (single-disciplinary: aerodynamics) design optimisation and the second considers a robust multidisciplinary (aero-structures) design optimisation. Numerical results show that the solutions obtained by the robust design method with statistical constraints have a more reliable performance and sensitivity in both aerodynamics and structures when compared to the baseline design. KeywordsRobust/uncertainty design–Multi-objective–Multidisciplinary–UAS–Evolutionary algorithms

Published
2019

41. MEE-DBD Plasma Actuator Effect on Aerodynamics of a NACA0015 Aerofoil: Separation and 3D Wake

Author

Qin, N, Periaux, J, Bugeda, G, Erfani, R, Kontis, K, Qin, N, Periaux, J, Bugeda, G, Erfani, R, and Kontis, K

Abstract

© 2020, Springer Nature Switzerland AG. Dielectric barrier discharge (DBD) plasma actuators have received considerable attention by many researchers for various flow control applications. Having no moving parts, being light-weight, easily manufacturable, and their ability to respond almost instantly are amongst the advantages which has made them a popular flow control device especially for application on aircraft wings. The new configuration of DBDs which uses multiple encapsulated electrodes (MEE) has been shown to produce a superior and more desirable performance over the standard actuator design. The objective of the current study is to examine the effect of this new actuator configuration on the aerodynamic performance of an aerofoil under leading edge separation and wake interaction conditions. The plasma actuator is placed at the leading edge of a symmetric NACA 0015 aerofoil which corresponds to the location of the leading edge slat. The aerofoil is operated in a chord Reynolds number of 0.2×106. Surface pressure measurements along with the mean velocity profile of the wake using pitot measurements are used to determine the lift and drag coefficients, respectively. Particle image velocimetry (PIV) is also utilised to visualise and quantify the induced flow field. The results show improvement in aerodynamic performances of aerofoil under leading edge separation and also facing the wake region.

Published
2019

45. Preface

Author

WINTER, G, primary, ECER, A, additional, FOX, P, additional, PERIAUX, J, additional, and SATOFUKA, N, additional

Published
1996
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