Nombre de documents

33

CNRS Senior Researcher in Computational Fluid Dynamics


 

FIELDS OF EXPERTISE:

 

·       Developing efficient numerical methods: the objective is to increase the capabilities of the numerical simulations by developing more accurate, reliable, and efficient computational methods. The central subjects deal with the development of high order numerical schemes with high fidelity shock capturing features, sub-grid scale modeling in Large Eddy Simulation (LES), multiresolution procedures based on a posteriori error estimate for adaptive mesh refinement and the processing of unsteady boundary conditions. These methods have recently been coupled with a new resolution strategy based on time operator splitting in the context of very localized and stiff reaction fronts for combustion problem.

 

·       Simulating fluid–structure interactions for transient dynamics problems, such as the impact of shock waves onto a structure, with possible fracturing causing the ultimate breakdown of the structure. We developed a new coupling algorithm between a compressible fluid flow and a moving body using an Embedded Boundary method that ensures the conservation of fluid mass and the balance of momentum and energy between fluid and solid.

 

·       Flow analysis and reduction of the dynamics: we developed techniques for the generation of data on a subset of the domain that capture the relevant spatio-temporal features of the flow. These techniques were manly used to generate unsteady inlet boundary conditions and wall modeling techniques for zonal approach in LES. They were based on modal decompositions (i.e. POD, DMD) and derivation of low order dynamical systems.

 

·       Manipulation and fluid flow control: a response surface-based optimizer was used to find the best set of Vortex Generator parameters to control the adverse pressure gradient at the rear-end of a car to achieve significant drag reduction.

 


Article dans une revue13 documents

  • Guillaume Fournier, Amer Chpoun, Yann Fraigneau, Christian Tenaud. Direct numerical simulations of the shock-induced separation of a laminar boundary layer. Ercoftac series, A Paraître, 24, pp.327--332. 〈10.1007/978-3-319-63212-4_41〉. 〈hal-01629644〉
  • Christian Tenaud, Philippe Debesse, Luc Pastur, François Lusseyran, Yann Fraigneau, et al.. A comparison of data reduction techniques for the aeroacoustic analysis of flow over a blunt flat plate. Theoretical and Computational Fluid Dynamics, Springer Verlag, 2016, 30 ( ), pp.253-274. 〈hal-01618254〉
  • Christian Tenaud, Bérengère Podvin, Yann Fraigneau, Virginie Daru. On wall pressure fluctuations and their coupling with vortex dynamics in a separated--reattached turbulent flow over a blunt flat plate. International Journal of Numerical Methods for Heat and Fluid Flow, Emerald, 2016, 61 ( ), pp.730-748. 〈hal-01618256〉
  • Christian Tenaud, Maria Adela Puscas, Laurent Monasse, Alexandre Ern, Christian Mariotti, et al.. A time semi-implicit scheme for the energy-balanced coupling of a shocked fluid flow with a deformable structure. Journal of Computational Physics, Elsevier, 2015, 296 ( ), pp.241-262. 〈hal-01618389〉
  • Christian Tenaud, Olivier Roussel, Linda Bentaleb. Unsteady compressible flow computations using an adaptive multiresolution technique coupled with a high-order one-step shock-capturing scheme. Computers and Fluids, Elsevier, 2015, 120 ( ), pp.111-125. 〈hal-01618390〉
  • Christian Tenaud, Olivier Roussel, Linda Bentaleb. Unsteady compressible flow computations using an adaptive multiresolution technique coupled with a high-order one-step shock-capturing scheme. Computers and Fluids, Elsevier, 2015, 120, pp.111 - 125. 〈10.1016/j.compfluid.2015.07.025〉. 〈hal-01400430〉
  • Bérengère Podvin, Yann Fraigneau, Christian Tenaud, Virginie Daru. Coherent structures in the boundary layer of a flat thick plate. Comptes rendus de l’Académie des sciences. Série IIb, Mécanique, physique, astronomie, Elsevier, 2014, 329 ( ), 8p. 〈hal-01618391〉
  • Max Duarte, Stéphane Descombes, Christian Tenaud, Sébastien Candel, Marc Massot. Time-space adaptive numerical methods for the simulation of combustion fronts. Combustion and Flame, Elsevier, 2013, 160 (6), pp.1083-1101. 〈10.1016/j.combustflame.2013.01.013〉. 〈hal-00727442v2〉
  • Max Duarte, Marc Massot, Stéphane Descombes, Christian Tenaud, Thierry Dumont, et al.. New resolution strategy for multi-scale reaction waves using time operator splitting, space adaptive multiresolution and dedicated high order implicit/explicit time integrators. SIAM Journal on Scientific Computing, Society for Industrial and Applied Mathematics, 2012, 34 (1), pp.76-104. 〈10.1137/100816869〉. 〈hal-00457731v4〉
  • Laurent Monasse, Virginie Daru, Christian Mariotti, Serge Piperno, Christian Tenaud. A conservative coupling algorithm between a compressible flow and a rigid body using an Embedded Boundary method. Journal of Computational Physics, Elsevier, 2012, 231, pp.2977-2994. 〈10.1016/j.jcp.2012.01.002〉. 〈hal-01163118〉
  • Christian Tenaud, Max Duarte. Tutorials on Adaptive multiresolution for mesh refinement applied to fluid dynamics and reactive media problems. ESAIM: Proceedings and Surveys, EDP Sciences, 2011, 34 ( ), pp.184-239. 〈hal-01618392〉
  • Virginie Daru, Christian Tenaud. Numerical simulation of the viscous shock tube problem by using a high resolution monotonicity-preserving scheme. Computers and Fluids, Elsevier, 2009, 38 ( ), pp.664-676. 〈hal-01618393〉
  • Virginie Daru, Christian Tenaud. Numerical simulation of the viscous shock tube problem by using a high resolution monotonicity-preserving scheme. Computers and Fluids, Elsevier, 2008, 38 (3), pp.664-676. 〈10.1016/j.compfluid.2008.06.008〉. 〈hal-01400427〉

Communication dans un congrès16 documents

  • Guillaume Fournier, Amer Chpoun, Yann Fraigneau, Christian Tenaud. Direct Numerical Simulations of the Shock-Induced Separation of a Laminar Boundary Layer. Dimokratis G.E. GrigoriadisBernard J. GeurtsHans KuertenJochen FröhlichVincenzo Armenio. Ercoftac Workshop on Direct and Large Eddy Simulation, May 2018, Limassol, Cyprus. 〈hal-01629385〉
  • Marc-Arthur N'Guessan, Marc Massot, Christian Tenaud, Laurent Series. Équations de Navier-Stokes incompressibles et multirésolution spatiale adaptative: sur la question des modes parasites en maillage collocalisé.. Congrès de la SMAI, Jan 2017, Ronce-les-Bains, La Tremblade, France. 〈hal-01629389〉
  • E. Saikali, G. Bernard-Michel, A. Sergent, Christian Tenaud. Large eddy simulations of an air-helium buoyant jet in a two vented enclosure: influence of the outlet boundary condition.. Congrès Français de Mécanique, Jan 2017, Lille, France. 〈hal-01629387〉
  • E. Saikali, G. Bernard-Michel, A. Sergent, Christian Tenaud, R. Salem. Highly resolve large eddy simulations of a transitional air-helium buoyant jet in a two vented enclosure: validation against particle image velocimetry experiments.. International Conference on Hydrogen Safety, Jan 2017, Hamburg, Germany. 〈hal-01629390〉
  • Guillaume Fournier, Amer Chpoun, Christian Tenaud. Shedding intermittency in a shockwave-laminar boundary layer interaction. International Congress of Theoretical and Applied Mechanics, Jan 2016, Montréal, Canada. 〈hal-01629392〉
  • Guilaume Fournier, Mohamed Sellam, Amer Chpoun, Yann Fraigneau, Christian Tenaud. Direct Numerical Simulations of the Interaction between an Oblique Shock Wave and a Boundary Layer Developing Along a Flat Plate. Springer. International Symposium on Shock Waves, Jan 2015, Tel Aviv, Israel. 〈hal-01629393〉
  • Christian Tenaud, Yann Fraigneau, Virginie Daru. Numerical simulation of the turbulent separation reattachment flow around a thick flat plate.. IOP. EUROMECH European Turbulence Conference, Jan 2011, Warsaw, Poland. 〈hal-01629400〉
  • Thomas Rouillon, Fabien Harambat, Christian Tenaud, Lionel Mathelin. Global optimization with Gaussian process and application to drag reduction with vortex generators. World Congress on Global Optimization in Engineering & Science, Jan 2011, Chania, Greece. 〈hal-01629397〉
  • Christian Tenaud, Yann Fraigneau, Virginie Daru. Simulation numérique du décollement et recollement turbulent autour d'une plaque plane épaisse. Congrès Français de Mécanique, Jan 2011, Besançon, France. 〈hal-01629401〉
  • Thomas Rouillon, Fabien Harambat, Christian Tenaud, Lionel Mathelin, A. Queuille. Modélisation par termes source de générateurs de vortex pour le contrôle d'écoulement : validations expérimentales et optimisations. Congrès Français de Mécanique, Jan 2011, Besançon, France. 〈hal-01629399〉
  • Thomas Rouillon, Fabien Harambat, Lionel Mathelin, Christian Tenaud. Global optimization of vortex generator parameters for drag reduction of ground vehicles. CFD & OPTIMIZATION, An ECCOMAS Thematic Conference, Jan 2011, Antalaya, Turkey. 〈hal-01629396〉
  • Laurent Monasse, Virginie Daru, Christian Mariotti, Serge Piperno, Christian Tenaud. A Conservative Coupling Method for Fluid-Structure Interaction in the Compressible Case. Sixth International Conference on Computational Fluid Dynamics, ICCFD6, Jul 2010, St Petersburg, Russia. Springer-Verlag, pp.Part 18, 473-478, 2011, 〈10.1007/978-3-642-17884-9_59〉. 〈hal-00676721〉
  • Joao Pinto, Yann Fraigneau, L Oliveira, Christian Tenaud. Numerical simulation of a two-phase flow in an oil filter by coupling a LES approach with a Lagrangian particle tracking. European Conference on Computational Fluid Dynamics, Jan 2010, Lisbon, Portugal. 〈hal-01629407〉
  • Christian Tenaud, Yann Fraigneau, Virginie Daru. Numerical simulation of the turbulent detached flow around a thick flat plate. International Conference on Computational Fluid Dynamics, Jan 2010, Saint Petersburg, Russia. 〈hal-01629402〉
  • Christian Tenaud. An adaptive multiresolution technique for unsteady compressible flow simulations. Symposium on Applied Aerodynamics, Jan 2010, Marseille, France. 〈hal-01629410〉
  • Max Duarte, Marc Massot, Frédérique Laurent, Stéphane Descombes, Christian Tenaud, et al.. New Resolution Strategies for Multi-scale Reaction Waves: Optimal Time Operator Splitting and Space Adaptive Multiresolution. Luca Cernuzzi, Ramon Puigjaner. XXXVI Latin American Conference on Informatics (CLEI 2010), Oct 2010, Asunción, Paraguay. 14 (1), Paper 6, 14 p., 2011. 〈hal-00697727〉

Chapitre d'ouvrage3 documents

  • Max Duarte, Marc Massot, Stéphane Descombes, Christian Tenaud, Sebastien Candel. Time-space adaptive numerical methods for the simulation of combustion fronts. Annual Research Briefs of the Center for Turbulence Research, Center for Turbulence Research - Stanford University, pp.347-358, 2012. 〈hal-00653056〉
  • Max Duarte, Marc Massot, Stéphane Descombes, Christian Tenaud, Thierry Dumont, et al.. New Resolution Strategy for Multi-scale Reaction Waves using Time Operator Splitting and Space Adaptive Multiresolution: Application to Human Ischemic Stroke. E. Cancès, V. Louvet, M. Massot. Summer school on multiresolution and adaptive mesh refinement methods, EDP Sciences, pp.Vol. 34 277-290, 2011, ESAIM: Proceedings, 〈10.1051/proc/201134006〉. 〈hal-00590812〉
  • Christian Tenaud, Max Duarte. Tutorials on Adaptive multiresolution for mesh refinement applied to fluid dynamics and reactive media problems. E. Cancés, V. Louvet and M. Massot. Summer school on multiresolution and adaptive mesh refinement methods, EDP Sciences, pp.Vol. 34 184-239, 2011, ESAIM: Proceedings, 〈10.1051/proc/201134004〉. 〈hal-00697705〉

Pré-publication, Document de travail1 document

  • Maria Adela Puscas, Laurent Monasse, Alexandre Ern, Christian Tenaud, Christian Mariotti. A conservative Embedded Boundary method for an inviscid compressible flow coupled with a fragmenting structure. 26p. 2014. 〈hal-01071619v2〉