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Marc MONTAGNAC

  Ingénieur de recherche
  Computational Fluid Dynamics
  +33 (0)5 61 19 30 48
  Marc.Montagnac@cerfacs.fr
  http://www.cerfacs.fr/~montagna

Publications

Champagneux, S., Daviller, G., Montagnac, M., Gazaix, M., Wlassow, F., Chaput, E., Hautreux, G. and Cirou, B. (2016) Simulation aéroacoustique de jet subsonique et réduction de bruit par micro-jets, Gazette du CINES, Grands Challenges GENCI-CINES 2016 (Septembre), pp. 56-62

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@ARTICLE{AR-CFD-16-243, author = {Champagneux, S. and Daviller, G. and Montagnac, M. and Gazaix, M. and Wlassow, F. and Chaput, E. and Hautreux, G. and Cirou, B. }, title = {Simulation aéroacoustique de jet subsonique et réduction de bruit par micro-jets}, year = {2016}, number = {Septembre }, volume = { Grands Challenges GENCI-CINES 2016}, pages = {56-62}, journal = {Gazette du CINES}, pdf = {http://cerfacs.fr/wp-content/uploads/2016/10/CFD_CHAMPAGNEUX_GAZETTE_CINES.pdf}}

Montanelli, H., Montagnac, M. and Gallard, F. (2015) Gradient span analysis method: application to the multipoint aerodynamic shape optimization of a turbine cascade, Journal of Turbomachinery, 137 (9), pp. 910006-91006

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@ARTICLE{AR-CFD-15-21301, author = {Montanelli, H. and Montagnac, M. and Gallard, F. }, title = {Gradient span analysis method: application to the multipoint aerodynamic shape optimization of a turbine cascade}, year = {2015}, number = {9}, volume = {137}, pages = {910006 - 91006}, journal = {Journal of Turbomachinery}, url = {http://turbomachinery.asmedigitalcollection.asme.org/data/Journals/JOTUEI/932770/turbo_137_09_091006.pdf?resultClick=3}}

Gallard, F., Mohammadi, B., Montagnac, M. and Meaux, M. (2015) An Adaptive Multipoint Formulation for Robust Parametric Optimization, Journal of Optimization Theory and Applications, 167 (2), pp. 693-715, ISSN 0022-3239

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@ARTICLE{AR-CFD-15-20930, author = {Gallard, F. and Mohammadi, B. and Montagnac, M. and Meaux, M. }, title = {An Adaptive Multipoint Formulation for Robust Parametric Optimization}, year = {2015}, number = {2}, volume = {167}, pages = {693-715}, issn = {0022-3239}, journal = {Journal of Optimization Theory and Applications}, abstract = {The performance of a system designed for given functioning conditions often seriously degrades, when operated at other conditions. Therefore, a system operating over a continuous range of conditions should be designed over this range. The aerodynamic shape optimization of an aircraft at multiple altitudes, angles of attack and Mach numbers is a typical case in aerospace. This paper links parametric and multipoint optimizations by the sampling of the operating condition ranges. It is demonstrated that this discrete set of operating conditions, used to formulate a composite objective function, must adequately be chosen. An algorithm is proposed to select these conditions, which ensures a minimal computational cost to the robust optimization. Wing aerodynamic multipoint optimizations using a lifting line model and Reynolds-averaged Navier-Stokes equations, derived with a discrete adjoint formulation, are given as examples.}, url = {http://link.springer.com/article/10.1007%2Fs10957-014-0595-6}}

Daviller, G., Boussuge, J. -F., Montagnac, M., Deniau, H., Gazaix, M. and Bogey, C. (2015) Jet-noise reduction by fluidic active control, Journal of Sound and Vibration, 340 (March 2015 - In: Aeroacoustics research in Europe: The CEAS-ASC report on 2013 highlights), pp. 44-45

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@ARTICLE{AR-CFD-15-20798, author = {Daviller, G. and Boussuge, J.-F. and Montagnac, M. and Deniau, H. and Gazaix, M. and Bogey, C. }, title = {Jet-noise reduction by fluidic active control }, year = {2015}, number = {March 2015 - In: Aeroacoustics research in Europe: The CEAS-ASC report on 2013 highlights}, volume = {340}, pages = {44-45}, journal = {Journal of Sound and Vibration}, pdf = {http://cerfacs.fr/wp-content/uploads/2017/02/CFD_DAVILLER_Highlights_CEAS_2013.pdf}}

Vanharen, J., Puigt, G. and Montagnac, M. (2015) Theoretical and numerical analysis of nonconforming grid interface for unsteady flows, Journal of Computational Physics, 285 (March), pp. 111-132, doi:10.1016/j.jcp.2015.01.013

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@ARTICLE{AR-CFD-15-21688, author = {Vanharen, J. and Puigt, G. and Montagnac, M. }, title = {Theoretical and numerical analysis of nonconforming grid interface for unsteady flows}, year = {2015}, number = {March}, volume = {285}, pages = {111 - 132}, doi = {10.1016/j.jcp.2015.01.013}, journal = {Journal of Computational Physics}, abstract = {A framework is proposed for the spectral analysis of the numerical scheme applied on a nonconforming grid interface between two structured blocks for the two-dimensional advection equation, in a cell-centered finite-volume formalism. The conservative flux computation on the nonconforming grid interface is based on the sum of partial fluxes computed with the same numerical scheme used for a standard cell interface. This framework is used to analyze the effect of grid refinement or coarsening on the stability of the second-order centered scheme. New theoretical results are given and compared to numerical results. Considering the convection of a two-dimensional isentropic vortex, the refinement/coarsening are shown to be the cause of instabilities, poor accuracy and reflection of high-frequency waves. A new approach to compute partial fluxes, which is based both on a high-order extrapolation that accounts for the local metric and on a Riemann solver, is then proposed to reduce spurious modes.}, url = {http://dx.doi.org/10.1016/j.jcp.2015.01.013}}

Pinel, X. and Montagnac, M. (2013) Block Krylov methods to solve adjoint problems in aerodynamic design optimization, AIAA Journal, 51 (9), pp. 2183-2191, doi:10.2514/1.J052113

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@ARTICLE{AR-CFD-13-21389, author = {Pinel, X. and Montagnac, M. }, title = {Block Krylov methods to solve adjoint problems in aerodynamic design optimization}, year = {2013}, number = {9}, volume = {51}, pages = {2183 - 2191}, doi = {10.2514/1.J052113}, journal = {AIAA Journal}, abstract = {A new resolution method for solving linear systems resulting from the discrete adjoint approach in aerodynamic shape optimization with a single objective and multiple constraint functions is presented. The steady flow is governed by the three-dimensional compressible Favre-averaged Navier–Stokes equations combined with a two-equation turbulence model. Block flexible variants of the generalized minimal residual method are Krylov methods designed for the solution of linear systems with multiple right-hand sides allowing variable preconditioning. Then, they can be applied to the discrete adjoint equations of Favre-averaged Navier–Stokes equations for all objective and constraint functions as a right-hand side. The paper focuses on the development of a new algorithm combining the three following features: flexibility, multiple right-hand-side concurrent processing, and spectral deflation. This latter property enables to recycle approximate spectral information from one restart to the next one in order to avoid generalized minimal residual stagnation when short restart recurrences are performed. This novel block method is named block flexible generalized minimal residual with deflated restarting. It is evaluated on two aerodynamic configurations showing its capabilities to reduce computational times over standard Krylov methods. }, url = {http://arc.aiaa.org/doi/abs/10.2514/1.J052113}}

Cambier, L., Gazaix, M., Heib, S., Plot, S., Poinot, M., Veuillot, J., Boussuge, J. -F. and Montagnac, M. (2011) CFD Platforms and Coupling: An Overview of the Multi-Purpose elsA Flow Solver, Aerospace Lab, Issue 2, pp. AL02-10

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@ARTICLE{AR-CFD-11-26925, author = {Cambier, L. and Gazaix, M. and Heib, Sébastien and Plot, Sylvie and Poinot, Marc and Veuillot, Jean-Pierre and Boussuge, J.-F. and Montagnac, M. }, title = {CFD Platforms and Coupling: An Overview of the Multi-Purpose elsA Flow Solver}, year = {2011}, volume = {Issue 2}, pages = {AL02-10}, journal = {Aerospace Lab}, pdf = {http://cerfacs.fr/wp-content/uploads/2017/02/CFD_CAMBIER_AL2-10.pdf}}

Braconnier, T., Ferrier, M., Jouhaud, J. -C., Montagnac, M. and Sagaut, P. (2011) Towards an adaptive POD/SVD surrogate model for aerodynamic design, Computers and Fluids, 40 (1), pp. 195-209, doi:10.1016/j.compfluid.2010.09.002

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@ARTICLE{AR-CFD-11-20626, author = {Braconnier, T. and Ferrier, M. and Jouhaud, J.-C. and Montagnac, M. and Sagaut, P. }, title = {Towards an adaptive POD/SVD surrogate model for aerodynamic design}, year = {2011}, number = {1}, volume = {40}, pages = {195 - 209}, doi = {10.1016/j.compfluid.2010.09.002}, journal = {Computers and Fluids}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_09_73.pdf}}

Landmann, B. and Montagnac, M. (2011) A highly automated parallel chimera method for overset grids based on the implicit hole cutting technique, International Journal for Numerical Methods in Fluids, 66 (6), pp. 778-804, ISSN 1097-0363, doi:10.1002/fld.2292

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@ARTICLE{AR-CFD-11-21178, author = {Landmann, B. and Montagnac, M. }, title = {A highly automated parallel chimera method for overset grids based on the implicit hole cutting technique}, year = {2011}, number = {6}, volume = {66}, pages = {778 - 804}, issn = {1097-0363}, doi = {10.1002/fld.2292}, journal = {International Journal for Numerical Methods in Fluids}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_08_81.pdf}}

Laurenceau, J., Meaux, M., Montagnac, M. and Sagaut, P. (2010) Comparison of gradient-based and gradient-enhanced response-surface-based optimizers, AIAA Journal, 48 (5), pp. 981-994, doi:10.2514/1.45331

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@ARTICLE{AR-CFD-10-21193, author = {Laurenceau, J. and Meaux, M. and Montagnac, M. and Sagaut, P. }, title = {Comparison of gradient-based and gradient-enhanced response-surface-based optimizers}, year = {2010}, number = {5}, volume = {48}, pages = {981 - 994}, doi = {10.2514/1.45331}, journal = {AIAA Journal}, abstract = {This paper deals with aerodynamic shape optimization using a high fidelity solver. Due to the computational cost needed to solve the Reynolds-averaged Navier-Stokes equations, the performance of the shape must be improved using very few objective function evaluations despite the high number of design variables. In our framework, the reference algorithm is a quasi-Newton gradient optimizer. An adjoint method inexpensively computes the sensitivities of the functions with respect to design variables to build the gradient of the objective function. As usual aerodynamic functions show numerous local optima when the shape varies, a more global optimizer is expected to be beneficial. Consequently, a Kriging based optimizer is set up and described. It uses an original sampling refinement process which adds up to three points per iteration by using a balancing between function minimization and error minimization. In order to efficiently apply this algorithm to high-dimensional problems, the same sampling process is reused to form a Cokriging (gradient-enhanced model) based optimizer. A comparative study is then described on two drag minimization problems depending on six and forty-five design variables. This study was conducted using an original set of performance criteria characterizing the strength and weakness of each optimizer in terms of improvement, cost, exploration and exploitation.}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_10_35.pdf}}

Gourdain, N., Montagnac, M., Wlassow, F. and Gazaix, M. (2010) High performance computing to simulate large scale industrial flows in multistage compressors., International Journal of High Performance Computing Applications, 24 (4), pp. 429-443, doi:10.1177/1094342010361481

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@ARTICLE{AR-CFD-10-20998, author = {Gourdain, N. and Montagnac, M. and Wlassow, F. and Gazaix, M. }, title = {High performance computing to simulate large scale industrial flows in multistage compressors.}, year = {2010}, number = {4}, volume = {24}, pages = {429 - 443}, doi = {10.1177/1094342010361481}, journal = {International Journal of High Performance Computing Applications}}

Gourdain, N., Gicquel, L. Y. M., Montagnac, M., Vermorel, O., Gazaix, M., Staffelbach, G., Garcia, M., Boussuge, J. -F. and Poinsot, T. (2009) High performance parallel computing of flows in complex geometries - part 1: methods, Computational Science and Discovery, 2 (November), pp. 15003

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@ARTICLE{AR-CFD-09-20992, author = {Gourdain, N. and Gicquel, L.Y.M. and Montagnac, M. and Vermorel, O. and Gazaix, M. and Staffelbach, G. and Garcia, M. and Boussuge, J.-F. and Poinsot, T. }, title = {High performance parallel computing of flows in complex geometries - part 1: methods}, year = {2009}, number = {November}, volume = {2}, pages = {015003}, journal = {Computational Science and Discovery}, abstract = {Efficient numerical tools coupled with high-performance computers, have become a key element of the design process in the fields of energy supply and transportation. However flow phenomena that occur in complex systems such as gas turbines and aircrafts are still not understood mainly because of the models that are needed. In fact, most computational fluid dynamics (CFD) predictions as found today in industry focus on a reduced or simplified version of the real system (such as a periodic sector) and are usually solved with a steady- state assumption. This paper shows how to overcome such barriers and how such a new challenge can be addressed by developing flow solvers running on high-end computing platforms, using thousands of computing cores. Parallel strategies used by modern flow solvers are discussed with particular emphases on mesh-partitioning, load balancing and communication. Two examples are used to illustrate these concepts: a multi-block structured code and an unstructured code. Parallel computing strategies used with both flow solvers are detailed and compared. This comparison indicates that mesh-partitioning and load balancing are more straightforward with unstructured grids than with multi-block structured meshes. However, the mesh-partitioning stage can be challenging for unstructured grids, mainly due to memory limitations of the newly developed massively parallel architectures. Finally, detailed investigations show that the impact of mesh-partitioning on the numerical CFD solutions, due to rounding errors and block splitting, may be of importance and should be accurately addressed before qualifying massively parallel CFD tools for a routine industrial use}, url = {http://iopscience.iop.org/article/10.1088/1749-4699/2/1/015003/pdf}}

Sicot, F., Puigt, G. and Montagnac, M. (2008) Block-Jacobi implicit algorithms for the time spectral method, AIAA Journal, 46 (12), pp. 3080-3089, doi:10.2514/1.36792

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@ARTICLE{AR-CFD-08-21608, author = {Sicot, F. and Puigt, G. and Montagnac, M. }, title = {Block-Jacobi implicit algorithms for the time spectral method}, year = {2008}, number = {12}, volume = {46}, pages = {3080 - 3089}, doi = {10.2514/1.36792}, journal = {AIAA Journal}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_08_10.pdf}}

Jouhaud, J. -C., Sagaut, P., Montagnac, M. and Laurenceau, J. (2007) A surrogate-model based multi-disciplinary shape optimization method with application to a 2d subsonic airfoil, Computers and Fluids, 36 (3), pp. 520-529, doi:10.1016/j.compfluid.2006.04.001

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@ARTICLE{AR-CFD-07-21089, author = {Jouhaud, J.-C. and Sagaut, P. and Montagnac, M. and Laurenceau, J. }, title = {A surrogate-model based multi-disciplinary shape optimization method with application to a 2d subsonic airfoil}, year = {2007}, number = {3}, volume = {36}, pages = {520 - 529}, doi = {10.1016/j.compfluid.2006.04.001}, journal = {Computers and Fluids}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_05_38.pdf}}

Jouhaud, J. -C., Montagnac, M. and Tourrette, L. (2005) Multigrid adaptive mesh refinement for structured meshes for 3D aerodynamic design, 47 (5), pp. 367-385, doi:10.1002/fld.804

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@ARTICLE{AR-CFD-05-21086, author = {Jouhaud, J.-C. and Montagnac, M. and Tourrette, L. }, title = {Multigrid adaptive mesh refinement for structured meshes for 3D aerodynamic design}, year = {2005}, number = {5}, volume = {47}, pages = {367 - 385}, doi = {10.1002/fld.804}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_03_85.pdf}}

Guegan, D., Julienne, F., Schvallinger, M., Gourdain, N., Gazaix, M. and Montagnac, M. (2015) Three-Dimensional full annulus unsteady RANS simulation of an integrated propulsion system, 51st AIAA/SAE/ASEE Joint Propulsion Conference. Orlando (FL), USA 2015, p. AIAA 2015-4021

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@CONFERENCE{PR-CFD-15-25238, author = {Guegan, D. and Julienne, F. and Schvallinger, M. and Gourdain, N. and Gazaix, M. and Montagnac, M. }, title = {Three-Dimensional full annulus unsteady RANS simulation of an integrated propulsion system}, year = {2015}, pages = {AIAA 2015-4021}, address = {Orlando (FL), USA}, booktitle = {51st AIAA/SAE/ASEE Joint Propulsion Conference }, url = {http://arc.aiaa.org/doi/abs/10.2514/6.2015-4021}}

Vanharen, J., Puigt, G. and Montagnac, M. (2015) Two-dimensional spectral analysis of nonconforming grid interface. Emphasis on unsteady flows, 50th 3AF international conference on applied aerodynamics. Toulouse France 2015

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@CONFERENCE{PR-CFD-15-23568, author = {Vanharen, J. and Puigt, G. and Montagnac, M. }, title = {Two-dimensional spectral analysis of nonconforming grid interface. Emphasis on unsteady flows}, year = {2015}, address = {Toulouse France}, booktitle = {50th 3AF international conference on applied aerodynamics}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_15_23.pdf}}

Gallard, F., Meaux, M., Montagnac, M. and Mohammadi, B. (2013) Aerodynamic aircraft design for mission performance by multipoint optimization, 21st aiaa computational fluid dynamics conference. San Diego, USA 2013

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@conference{PR-CFD-13-23301, author = {Gallard, F. and Meaux, M. and Montagnac, M. and Mohammadi, B. }, title = {Aerodynamic aircraft design for mission performance by multipoint optimization}, year = {2013}, address = {San Diego, USA}, booktitle = {21st aiaa computational fluid dynamics conference}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_13_124.pdf}}

Puigt, G., Gazaix, M., Montagnac, M., Le Pape, M. -C., Marmignon, C., Boussuge, J. -F. and Couaillier, V. (2011) Development of a new hybrid compressible solver inside the CFD elsA software, 41st AIAA fluid dynamics conference and exhibit. Hawaii Convention Center, Honolulu 2011

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@CONFERENCE{PR-CFD-11-23492, author = {Puigt, G. and Gazaix, M. and Montagnac, Marc and Le Pape, M.-C. and Marmignon, C. and Boussuge, J.-F. and Couaillier, V. }, title = {Development of a new hybrid compressible solver inside the CFD elsA software}, year = {2011}, address = {Hawaii Convention Center, Honolulu}, booktitle = {41st AIAA fluid dynamics conference and exhibit}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_11_64.pdf}}

Gicquel, L. Y. M., Cuenot, B., Staffelbach, G., Riber, E., Dauptain, A., Gourdain, N., Montagnac, M., Boussuge, J. -F., Gazaix, M. and Poinsot, T. (2010) High performance computing of industrial flows: application to aeronautic and propulsion challenges - invited conference, 1st workshop on Complex Fluid Dynamics. Kaust campus, Saudi Arabia 2010

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@CONFERENCE{PR-CFD-10-23319, author = {Gicquel, L.Y.M. and Cuenot, B. and Staffelbach, G. and Riber, E. and Dauptain, A. and Gourdain, N. and Montagnac, M. and Boussuge, J.-F. and Gazaix, M. and Poinsot, Th. }, title = {High performance computing of industrial flows: application to aeronautic and propulsion challenges - invited conference}, year = {2010}, address = {Kaust campus, Saudi Arabia}, booktitle = {1st workshop on Complex Fluid Dynamics}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_10_21.pdf}}

Wlassow, F., Gourdain, N. and Montagnac, M. (2009) Numerical simulation of aerodynamic instabilities in a multi-stage compressor, Proceedings of the 12th international symposium on unsteady aerodynamics, aeroacoustics & aeroelasticity of turbomachines - ISUAAAT12. Imperial College, London United Kingdom 2009

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@conference{PR-CFD-09-23583, author = {Wlassow, F. and Gourdain, N. and Montagnac, M. }, title = {Numerical simulation of aerodynamic instabilities in a multi-stage compressor}, year = {2009}, address = {Imperial College, London United Kingdom}, booktitle = {Proceedings of the 12th international symposium on unsteady aerodynamics, aeroacoustics & aeroelasticity of turbomachines - ISUAAAT12}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_09_127.pdf}}

Gourdain, N., Gicquel, L. Y. M., Montagnac, M., Vermorel, O., Gazaix, M., Staffelbach, G., Garcia, M., Boussuge, J. -F. and Poinsot, T. (2009) High performance computing of industrial flows: application to aeronautic and propulsion challenges - invited conference, VKI lecture series on high performance computing of industrial flows. Von Karman Institute, Brussels, Belgium 2009

@CONFERENCE{PR-CFD-09-23340, author = {Gourdain, N. and Gicquel, L.Y.M. and Montagnac, M. and Vermorel, O. and Gazaix, M. and Staffelbach, G. and Garcia, M. and Boussuge, J.-F. and Poinsot, Th. }, title = {High performance computing of industrial flows: application to aeronautic and propulsion challenges - invited conference}, year = {2009}, address = {Von Karman Institute, Brussels, Belgium}, booktitle = {VKI lecture series on high performance computing of industrial flows}}

Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2009) Numerical Simulation of an axial compressor with non axisymetric casing treatment, Progress in propulsion physics. 2009, p. 593-608, doi:10.1051/eucass/200901593

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@CONFERENCE{PR-CFD-09-20990, author = {Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Numerical Simulation of an axial compressor with non axisymetric casing treatment}, year = {2009}, booktitle = {Progress in propulsion physics}, pages = {593-608}, doi = {10.1051/eucass/200901593}, pdf = {http://cerfacs.fr/wp-content/uploads/2017/03/CFD_GOURDAIN_EUCAS08.pdf}}

Gourdain, N., Stoll, M., Montagnac, M. and Boussuge, J. -F. (2009) Numerical Investigation of the Tip Leakage Flow in a Multistage High Pressure Compressor, Computational Fluid Dynamics 2008. Seoul, Korea 2009, p. 217-229

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@CONFERENCE{PR-CFD-09-20994, author = {Gourdain, N. and Stoll, M. and Montagnac, M. and Boussuge, J.-F. }, title = {Numerical Investigation of the Tip Leakage Flow in a Multistage High Pressure Compressor}, year = {2009}, booktitle = {Computational Fluid Dynamics 2008}, pages = {217-229}, address = {Seoul, Korea}, abstract = {This study takes place in the frame of a research project to simulate the flow in a multistage High Pressure Compressor (HPC). The present paper focuses on the effect of tip gap deteriorations that occur in a high pressure compressor due to thermal constraints. To simulate this challenging industrial problem, the compressor is considered with two radial tip gap dimensions. The flow is computed by the mean of a 3D unsteady RANS calculation and is compared with experimental measurements, showing that a good decription of the mean flow is obtained with the proposed numerical model. The results show that the last stage is responsible for the loss of stability. An increase of the radial tip gap leads to a dramatic reduction of operability (by 20%), pressure ratio and efficiency. Finally, detailed investigation of the flow at offdesign conditions are presented to obtain a better understanding of the flow in this multistage compressor. }, url = {http://link.springer.com/chapter/10.1007/978-3-642-01273-0_26}}

Gazaix, M., Mazet, S. and Montagnac, M. (2008) Large scale massively parallel computations with the block-structured elsA CFD software, 20th international conference on parallel computational fluid dynamics. Lyon, France 2008, p. 111-117

@conference{PR-CFD-08-23311, author = {Gazaix, M. and Mazet, S. and Montagnac, M. }, title = {Large scale massively parallel computations with the block-structured elsA CFD software}, year = {2008}, pages = {111 - 117}, address = {Lyon, France}, booktitle = {20th international conference on parallel computational fluid dynamics}}

Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2007) Numerical simulation of an axial compressor with non axisymetric casing treatment, 2nd european conference for aerospace sciences. Bruxelles, Belgique 2007

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@conference{PR-CFD-07-23337, author = {Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Numerical simulation of an axial compressor with non axisymetric casing treatment}, year = {2007}, pages = {}, address = {Bruxelles, Belgique}, booktitle = {2nd european conference for aerospace sciences}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_07_131.pdf}}

Fillola, G., Le Pape, M. -C. and Montagnac, M. (2004) Numerical simulations around wing control surfaces, 24th international congress ot the aeronautical sciences. Yokohama, Japan 2004

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@CONFERENCE{PR-CFD-04-23289, author = {Fillola, G. and Le Pape, M.-C. and Montagnac, Marc}, title = {Numerical simulations around wing control surfaces}, year = {2004}, address = {Yokohama, Japan}, booktitle = {24th international congress ot the aeronautical sciences}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_04_87.pdf}}

Boussuge, J. -F., Champagneux, S., Chevalier, G., Giraud, L., Loercher, F. and Montagnac, M. (2004) How to maintain efficiency on vector and SMP platforms for large aerodynamic calculations, European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS) 2004. Jyvaskyla, Finlande 2004, CIMNE (Ed.), CD-ROM Vol.1 (Session CFD-1067.pdf), p. 5 pags

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@CONFERENCE{PR-CFD-04-20618, author = {Boussuge, J.-F. and Champagneux, S. and Chevalier, G. and Giraud, L. and Loercher, F. and Montagnac, M. }, title = {How to maintain efficiency on vector and SMP platforms for large aerodynamic calculations}, year = {2004}, booktitle = {European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS) 2004}, editor = {CIMNE}, volume = {CD-ROM Vol.1}, number = {Session CFD-1067.pdf}, pages = {5 pags}, address = {Jyvaskyla, Finlande}, abstract = {Large industrial aerodynamic calculations are nowadays performed indifferently on parallel vector computers or on clusters of SMPs. From a software design point of view it is crucial to ensure the best possible sustained megaflops rate on both platforms while for sake of minimal labour effort it is important to maintain only one source code. In this paper we describe software techniques that have been implemented to comply with these constraints. We first show how we succeeded to obtain a sustained megaflops rate that is independent of the mesh size. We then investigate the possibilities of using OpenMP in some of the main time consuming routines to replace the vectorization by fine grain parallelism to better exploit the shared memory available within each node of the SMP computers.}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_04_58.pdf}}

Montagnac, M. and Pinel, X. (2014), Block Krylov methods for aerodynamic design optimization, Cerfacs, Toulouse, contract report

@TECHREPORT{CR-CFD-14-21300, author = {Montagnac, M. and Pinel, X. }, title = {Block Krylov methods for aerodynamic design optimization}, year = {2014}, institution = {Cerfacs, Toulouse}, type = {contract report}}

Montagnac, M. (2013) 10 , Variable normalization (nondimensionalization and scaling) for navier-stokes equations: a practical guide, Cerfacs, Toulouse, technical report

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@TECHREPORT{TR-CFD-13-23422, author = {Montagnac, M. }, title = {Variable normalization (nondimensionalization and scaling) for navier-stokes equations: a practical guide}, year = {2013}, institution = {Cerfacs, Toulouse}, month = {10}, type = {technical report}, url = {https://doi.org/10.13140/RG.2.1.2684.7442}}

Gallard, F., Montagnac, M., Mohammadi, B. and Meaux, M. (2012) 6 , Robust parametric shape design by multipoint optimization, Cerfacs, technical report

[url]

@TECHREPORT{TR-CFD-12-20928, author = {Gallard, F. and Montagnac, Marc and Mohammadi, B. and Meaux, M. }, title = {Robust parametric shape design by multipoint optimization}, year = {2012}, institution = {Cerfacs}, month = {6}, type = {technical report}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_12_33.pdf}}

Mouffe, M., Dechaume, A., Dufour, G. and Montagnac, M. (2010) 12 , Amélioration de la capacité et des performances de la chaîne structurée multibloc, Cerfacs, Technical report

@TECHREPORT{TR-CFD-10-21313,author = {Mouffe, M. and Dechaume, A. and Dufour, G. and Montagnac, M. },title = {Amélioration de la capacité et des performances de la chaîne structurée multibloc}, year = {2010}, institution = {Cerfacs}, month = {12}, type = {Technical report}}

Laurenceau, J. and Montagnac, M. (2009) 7 , PHYV WP1.1 OPTIM2 : rapport technique de synthèse T0+12, Cerfacs, contractual report

@techreport{TR-CFD-09-23391, author = {Laurenceau, J. and Montagnac, M. }, title = {PHYV WP1.1 OPTIM2 : rapport technique de synthèse T0+12}, year = {2009}, institution = {Cerfacs}, month = {7}, type = {contractual report}}

Montagnac, M. and Laurenceau, J. (2009) 2 , Rapport d'avancement T0+6 PHYV WP1.1 OPTIM2, Cerfacs, rapport non diffusable

@techreport{TR-CFD-09-21296, author = {Montagnac, M. and Laurenceau, J. }, title = {Rapport d'avancement T0+6 PHYV WP1.1 OPTIM2}, year = {2009}, institution = {Cerfacs}, month = {2}, type = {rapport non diffusable}}

Puigt, G., Montagnac, M. and Gazaix, M. (2009), Avancement du projet elsA hybride au 30 avril 2009, Cerfacs

@techreport{TR-CFD-09-21449, author = {Puigt, G. and Montagnac, M. and Gazaix, M. }, title = {Avancement du projet elsA hybride au 30 avril 2009}, year = {2009}, institution = {Cerfacs}}

Wlassow, F., Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2008), Simulation numérique de l'écoulement instationnaire dans un compresseur multi-étage sur une plateforme de calcul massivement parallèle, Cerfacs, contract report

@TECHREPORT{CR-CFD-08-21757, author = {Wlassow, F. and Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Simulation numérique de l'écoulement instationnaire dans un compresseur multi-étage sur une plateforme de calcul massivement parallèle}, year = {2008}, institution = {Cerfacs}, type = {contract report}}

Laurenceau, J. and Montagnac, M. (2008) 6 , Rapport technique troisième année. optimisation multidisciplinaire préliminaire de l'installation motrice avec la cha\îne d'optimisation de formes aérodynamiques OPTALIA, Cerfacs, contract report

@techreport{CR-CFD-08-21192, author = {Laurenceau, J. and Montagnac, M. }, title = {Rapport technique troisième année. optimisation multidisciplinaire préliminaire de l'installation motrice avec la cha\îne d'optimisation de formes aérodynamiques OPTALIA}, year = {2008}, institution = {Cerfacs}, month = {6}, type = {contract report}}

Roumeas, M., Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2007) 12 , Etude de l'influence du traitement de carter non axisymétrique sur un compresseur HP transsonique, Cerfacs, contract report

@techreport{CR-CFD-07-21488, author = {Roumeas, M. and Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Etude de l'influence du traitement de carter non axisymétrique sur un compresseur HP transsonique}, year = {2007}, institution = {Cerfacs}, month = {12}, type = {contract report}}

Montagnac, M. and Landmann, B. (2007) 12 , Rapport technique d'avancement T0+18, DTP modèles de données aérodynamiques - phase 3, Cerfacs, rapport contractuel

@techreport{TR-CFD-07-21295, author = {Montagnac, M. and Landmann, B. }, title = {Rapport technique d'avancement T0+18, DTP modèles de données aérodynamiques - phase 3}, year = {2007}, institution = {Cerfacs}, month = {12}, type = {rapport contractuel}}

Montagnac, M., Jouhaud, J. -C. and Landmann, B. (2007) 5 , Rapport technique d'avancement T0+12, DTP modèles de données aérodynamiques - phase 3, Cerfacs, rapport contractuel

@techreport{TR-CFD-07-21294, author = {Montagnac, M. and Jouhaud, J.-C. and Landmann, B. }, title = {Rapport technique d'avancement T0+12, DTP modèles de données aérodynamiques - phase 3}, year = {2007}, institution = {Cerfacs}, month = {5}, type = {rapport contractuel}}

Laurenceau, J. and Montagnac, M. (2007) 5 , Rapport technique d'avancement deuxième année. Optimisation multidisciplinaire préliminaire de l'installation motrice avec la cha\îne d'optimisation de formes aérodynamiques OPTALIA, Cerfacs, rapport contractuel

@techreport{TR-CFD-07-21189, author = {Laurenceau, J. and Montagnac, M. }, title = {Rapport technique d'avancement deuxième année. Optimisation multidisciplinaire préliminaire de l'installation motrice avec la cha\îne d'optimisation de formes aérodynamiques OPTALIA}, year = {2007}, institution = {Cerfacs}, month = {5}, type = {rapport contractuel}}

Montagnac, M. (2007) 3 , Rapport technique de synthèse PRC ANANAS phase 2, Cerfacs, rapport technique

@techreport{TR-CFD-07-21293, author = {Montagnac, M. }, title = {Rapport technique de synthèse PRC ANANAS phase 2}, year = {2007}, institution = {Cerfacs}, month = {3}, type = {rapport technique}}

Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2007) 3 , Evaluation des performances du compresseur NEWAC avec traitements de carter, Cerfacs, rapport contractuel

@techreport{TR-CFD-07-20988, author = {Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Evaluation des performances du compresseur NEWAC avec traitements de carter}, year = {2007}, institution = {Cerfacs}, month = {3}, type = {rapport contractuel}}

Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2007) 1 , Etude de traitement de carter non axisymétrique -Compte rendu de l'action WP3- Evaluation de la validité d'une approche loi de paroi, contract report

@TECHREPORT{CR-CFD-07-1, author = {Gourdain, N. and Montagnac, Marc and Boussuge, J.-F. }, title = {Etude de traitement de carter non axisymétrique -Compte rendu de l'action WP3- Evaluation de la validité d'une approche loi de paroi}, year = {2007}, month = {1}, type = {contract report}, abstract = {L'objectif de ce rapport est d'estimer la validité de l'approche loi de paroi dans le cadre de calcul de traitement de carter. Cette méthode est étudiée afin de diminuer le coût du calcul. La première partie du document détail la mise en place du calcul, plus précisément la réalisation du maillage et la redéfinition des paramètres numériques (pas de temps). Dans un deuxième temps, les résultats de ce calcul sont comparés à ceux obtenus par une approche " bas Reynolds ". La validité de la méthode utilisant les lois de paroi est ensuite discutée.}}

Montagnac, M., Jouhaud, J. -C., Landmann, B. and Boussuge, J. -F. (2006) 12 , Rapport avancement T0+6, DTP modèles de données aérodynamiques - phase 3, Cerfacs, contract report

@techreport{CR-CFD-06-21292, author = {Montagnac, M. and Jouhaud, J.-C. and Landmann, B. and Boussuge, J.-F. }, title = {Rapport avancement T0+6, DTP modèles de données aérodynamiques - phase 3}, year = {2006}, institution = {Cerfacs}, month = {12}, type = {contract report}}

Blanc, F., Boin, J., Boussuge, J. -F., Montagnac, M. and Puigt, G. (2006) 12 , Programme FLOWSIM II : réponse au cahier des charges du 30/05/2006, number 06012906, WP2: flow simulation system development, Cerfacs, contract report

@techreport{CR-CFD-06-20584, author = {Blanc, F. and Boin, J.-Ph. and Boussuge, J.-F. and Montagnac, M. and Puigt, G. }, title = {Programme FLOWSIM II : réponse au cahier des charges du 30/05/2006, number 06012906, WP2: flow simulation system development}, year = {2006}, institution = {Cerfacs}, month = {12}, type = {contract report}}

Gourdain, N., Montagnac, M. and Boussuge, J. -F. (2006) 9 , Calcul de démonstration d'une configuration de rotor isolé avec traitement de carter non axisymétrique, CERFACS, contract report

@techreport{CR-CFD-06-23336, author = {Gourdain, N. and Montagnac, M. and Boussuge, J.-F. }, title = {Calcul de démonstration d'une configuration de rotor isolé avec traitement de carter non axisymétrique}, year = {2006}, institution = {CERFACS}, month = {9}, type = {contract report}}

Montagnac, M. (2005) 12 , Rapport d'avancement T0P12 ANANAS, Cerfacs, contract report ananas

@techreport{TR-CFD-05-21291, author = {Montagnac, M. }, title = {Rapport d'avancement T0P12 ANANAS}, year = {2005}, institution = {Cerfacs}, month = {12}, type = {contract report ananas}}

Montagnac, M., Boin, J. and Boussuge, J. -F. (2005) 12 , Programme FLOWSIM, réponse au cahier des charges du 20/10/2005, Number D05025044, Cerfacs, contract report flowsim

@techreport{TR-CFD-05-23421, author = {Montagnac, M. and Boin, J.-Ph. and Boussuge, J.-F. }, title = {Programme FLOWSIM, réponse au cahier des charges du 20/10/2005, Number D05025044}, year = {2005}, institution = {Cerfacs}, month = {12}, type = {contract report flowsim}}

Montagnac, M. (2005) 6 , Note d'avancement T0P6 ANANAS, Cerfacs, contract report ananas

@techreport{TR-CFD-05-21290, author = {Montagnac, M. }, title = {Note d'avancement T0P6 ANANAS}, year = {2005}, institution = {Cerfacs}, month = {6}, type = {contract report ananas}}

Montagnac, M., Boussuge, J. -F., Champagneux, S., Chevalier, G., Giraud, L., Loercher, F., Delbove, J., Hanss, G. and Toussaint, X. (2004) 12 , Rapport final ParelsA : consolidation de la parallélisation du logiciel elsA, Cerfacs, rapport technique rt 3/07380 onera/dsna

@techreport{TR-CFD-04-21289, author = {Montagnac, M. and Boussuge, J.-F. and Champagneux, S. and Chevalier, G. and Giraud, L. and Loercher, F. and Delbove, J. and Hanss, G. and Toussaint, X. }, title = {Rapport final ParelsA : consolidation de la parallélisation du logiciel elsA}, year = {2004}, institution = {Cerfacs}, month = {12}, type = {rapport technique rt 3/07380 onera/dsna}}

Montagnac, M., Delbove, J., Loercher, F. and Toussaint, X. (2003) 2 , Note d'avancement T0P6 ParelsA : consolidation de la parallélisation du logiciel elsA, Cerfacs, contract report parelsa

@techreport{TR-CFD-03-21288, author = {Montagnac, M. and Delbove, J. and Loercher, F. and Toussaint, X. }, title = {Note d'avancement T0P6 ParelsA : consolidation de la parallélisation du logiciel elsA}, year = {2003}, institution = {Cerfacs}, month = {2}, type = {contract report parelsa}}

Jouhaud, J. -C. and Montagnac, M. (2002) 2 , AMR multigrille K-eps : une méthode d'adaptation de maillages pour les écoulements turbulents, Cerfacs, rapport contractuel

@techreport{TR-CFD-02-21085, author = {Jouhaud, J.-C. and Montagnac, M. }, title = {AMR multigrille K-eps : une méthode d'adaptation de maillages pour les écoulements turbulents}, year = {2002}, institution = {Cerfacs}, month = {2}, type = {rapport contractuel}}