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Guillaume Balarac

Guillaume Balarac


Maître de conférences / Directeur adjoint
Téléphone : 04.76.82.51.42
Courriel : Guillaume.Balarac(A)legi.grenoble-inp.fr
Bureau : A116
Équipe : MOST


Activité de recherche


Dans un contexte où les contraintes énergétiques et environnementales sont croissantes, la conception et l’optimisation de systèmes mettant en jeu des fluides nous imposent une représentation plus fine des écoulements. Or, dans de nombreuses applications les écoulements sont turbulents, rendant ainsi délicates leur prédiction et leur analyse. Ces écoulements se caractérisent en effet par une apparence désordonnée où des mouvements secondaires tridimensionnels se développent sur une large gamme d’échelles et se superposent au mouvement moyen de l’écoulement. Le développement constant de la puissance des calculateurs permet désormais d’envisager la simulation numérique instationnaire comme un outil performant pour la prédiction de tels écoulements, donnant accès à une information spatio-temporelle riche pour l’analyse physique des écoulements.

Mes recherches ont ainsi pour vocation d’approfondir l’analyse de ces phénomènes complexes et de leurs conséquences, tout en développant les outils nécessaires à leur prédiction. Je développe ainsi des axes de recherche qui ont pour vocation de mieux prédire, comprendre et contrôler les écoulements turbulents et leurs conséquences. Il s’agit ainsi de couvrir un large spectre d’activités incluant le développement d’outils numériques (modèles et méthodes), l’analyse et le contrôle de phénomènes fondamentaux de la turbulence (instabilités, mélange, loi d’échelle...), jusqu’aux transferts vers des configurations représentatives de systèmes industriels (principalement dans le domaine des énergies renouvelables). Ainsi, les recherches menées sont pilotées par un intérêt scientifique commun qui porte sur la physique de la turbulence, que ce soit à petite échelle, avec le développement de modèles sous-maille pour les approches de type SGE (LES en anglais), ou à grande échelle, avec l’analyse et le contrôle d’écoulements.


Parcours professionnel

- 2019

- 2017 - 2022

  • Membre junior de l’Institut Universitaire de France (IUF)

- Décembre 2015

  • Habilitation à Diriger des Recherches (HDR) "Simulation instationnaire de la turbulence : prédiction, analyse, et contrôle d’écoulement"

- Depuis sep. 2008

- 2007 – 2008

- 2003 – 2006

  • Thèse de doctorat "Etude numérique de la dynamique tourbillonnaire et du mélange dans les jets coaxiaux turbulents" (directeurs de thèse : Pr. M. Lesieur et Pr. O. Métais), G-INP, LEGI.


Publications

Peer-reviewed Publications

2020
Guillaud, N., Balarac, G., Goncalvès Da Silva, E., & Zanette, J. (2020). Large Eddy Simulations on Vertical Axis Hydrokinetic Turbines – Power coefficient analysis for various solidities. Renewable Energy, 147, 473–486.
2019
Doussot, F., Balarac, G., Brammer, J., Métais, O., & Ségoufin, C. (2019). Numerical simulation and analysis at partial load in Francis turbines: Three-dimensional topology and frequency signature of inter-blade vortices. IOP Conference Series: Earth and Environmental Science, 240, 022045.
2018
Decaix, J., Dreyer, M., Balarac, G., Farhat, M., & Munch, C. (2018). RANS computations of a confined cavitating tip-leakage vortex. European Journal of Mechanics – B/Fluids, .
Guillaud, N., Balarac, G., & Goncalvès Da Silva, E. (2018). Large Eddy Simulations on a pitching airfoil: Analysis of the reduced frequency influence. Computers and Fluids, 161, 1–13.
Odier, N., Balarac, G., & Corre, C. E. (2018). Numerical analysis of the flapping mechanism for a two-phase coaxial jet. International Journal of Multiphase Flow, 106, 164–178.
2017
Canet, L., Rossetto, V., Wschebor, N., & Balarac, G. (2017). Spatiotemporal velocity-velocity correlation function in fully developed turbulence. Physical Review E, 95, 023107.
Kunhappan, D., Harthong, B., Chareyre, B., Balarac, G., & Dumont, P. J. J. (2017). Numerical modeling of high aspect ratio flexible fibers in inertial flows. Physics of Fluids, 29(9), 093302.
Pushkarev, A., Balarac, G., & Bos, W. J. T. (2017). Reynolds and Prandtl number scaling of viscous heating in isotropic turbulence. Physical Review Fluids, 2(8), 084606.
Vollant, A., Balarac, G., & Corre, C. E. (2017). Subgrid-scale scalar flux modelling based on optimal estimation theory and machine-learning procedures. Journal of Turbulence, 18(9), 854–878.
2016
Bénard, P., Balarac, G., Moureau, V., Dobrzynski, C., Lartigue, G., & D’angelo, Y. (2016). Mesh adaptation for large-eddy simulations in complex geometries. International Journal for Numerical Methods in Fluids, 81(12), 719–740.
Kessar, M., Balarac, G., & Plunian, F. (2016). The effect of subgrid-scale models on grid-scale/subgrid-scale energy transfers in large-eddy simulation of incompressible magnetohydrodynamic turbulence. Physics of Plasmas, .
Vollant, A., Balarac, G., & Corre, C. E. (2016). A dynamic regularized gradient model of the subgrid-scale stress tensor for large-eddy simulation. Physics of Fluids, 28(2), 025114.
Wilhelm, S., Balarac, G., Métais, O., & Ségoufin, C. (2016). Analysis of Head Losses in a Turbine Draft Tube by Means of 3D Unsteady Simulations. Flow, Turbulence and Combustion, 97(4), 1255–1280.
2015
Capuano, F., Coppola, G., Balarac, G., & De Luca, L. (2015). Energy preserving turbulent simulations at a reduced computational cost. Journal of Computational Physics, .
Decaix, J., Balarac, G., Dreyer, M., Farhat, M., & Munch, C. (2015). RANS and LES computations of the tip- leakage vortex for different gap widths. Journal of Turbulence, 16(4), 309–341.
Kessar, M., Plunian, F., Stepanov, R., & Balarac, G. (2015). Non-Kolmogorov cascade of helicity-driven turbulence. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, .
Odier, N., Balarac, G., Corre, C. E., & Moureau, V. (2015). Numerical study of a flapping liquid sheet sheared by a high-speed stream. International Journal of Multiphase Flow, 77, 2259.
2014
Lagaert, J. - B., Balarac, G., & Cottet, G. - H. (2014). Hybrid spectral-particle method for the turbulent transport of a passive scalar. Journal of Computational Physics, 260, 127–142.
Stepanov, R., Plunian, F., Kessar, M., & Balarac, G. (2014). Systematic bias in the calculation of spectral density from a three-dimensional spatial grid. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, , 053309.
2013
Balarac, G., Le Sommer, J., Meunier, X., & Vollant, A. (2013). A dynamic regularized gradient model of the subgrid-scale scalar flux for large eddy simulations. Physics of Fluids, , 075107.
Brugière, O., Balarac, G., Corre, C. E., Métais, O., Flores, E., & Leroy, P. (2013). Numerical optimization of a Francis turbine’s guide vane axis location including inflow uncertainties. La Houille Blanche – Revue internationale de l’eau, .
Congedo, P. M., Balarac, G., Duprat, C., & Corre, C. E. (2013). Numerical prediction of turbulent flows using Reynolds-averaged Navier-Stokes and large-eddy simulation with uncertain inflow conditions. International Journal for Numerical Methods in Fluids, 72(3), 341–358.
Duchaine, F., Maheu, N., Moureau, V., Balarac, G., & Moreau, S. (2013). Large-Eddy Simulation and Conjugate Heat Transfer Around a Low-Mach Turbine Blade. Journal of Turbomachinery, .
2011
Duprat, C., Balarac, G., Métais, O., Congedo, P. M., & Brugière, O. (2011). A wall-layer model for large-eddy simulations of turbulent flows with/out pressure gradient. Physics of Fluids, 23, 015101.
Fabre, Y., & Balarac, G. (2011). Development of a new dynamic procedure for the Clark model of the subgrid-scale scalar flux using the concept of optimal estimator. Physics of Fluids, 23, 115103.
2010
Duprat, C., Balarac, G., Métais, O., & Laverne, T. (2010). Simulation des Grandes Echelles d’un Aspirateur de Centrale Hydraulique. Mechanics & Industry, 10(3).
2009
Kaul, C. M., Raman, V., Balarac, G., & Pitsch, H. (2009). Numerical errors in the computation of subfilter scalar variance in large eddy simulations . Physics of Fluids, 21, 055102.
2008
Balarac, G., Pitsch, H., & Raman, V. (2008). Development of a dynamic model for the subfilter scalar variance using the concept of optimal estimators. Physics of Fluids, 20, 035114.
Balarac, G., Pitsch, H., & Raman, V. (2008). Modeling of the subfilter scalar dissipation rate using the concept of optimal estimators. Physics of Fluids, 20, 091701.
Brun, C., Balarac, G., Da Silva, C. B., & Métais, O. (2008). Effects of molecular diffusion on the subgrid-scale modeling of passive scalars. Physics of Fluids, 20(2).
Brun, C., Balarac, G., Da Silva, C. B., & Métais, O. (2008). Effects of molecular diffusion on the subgrid-scale modeling of passive sclars. Physics of Fluids, 20, 025102.
Desjardins, O., Blanquart, G., Balarac, G., & Pitsch, H. (2008). High order conservative finite difference scheme for variable density low Mach number turbulent flows. Journal of Computational Physics, 227(15), 7125–7159.
Pitsch, H., Desjardins, O., Balarac, G., & Ihme, M. (2008). Large-eddy simulation of turbulent reacting flows. Progress in Aerospace Sciences, 44(6), 466–478.
2007
Balarac, G., Métais, O., & Lesieur, M. (2007). Mixing enhancement in coaxial jets through inflow forcing : a numerical study. Physics of Fluids, 19(7), 075102.
Balarac, G., Si-Ameur, M., Lesieur, M., & Métais, O. (2007). Direct numerical simulations of high velocity ratio coaxial jets : mixing properties and influence of upstream conditions. Journal of Turbulence, 8(22), 1–27.
2005
Balarac, G., & Métais, O. (2005). The near field of coaxial jets: a numerical study. Physics of Fluids, 17, 065–102.
Balarac, G., & Si-Ameur, M. (2005). Mixing and coherent vortices in turbulent coaxial jets, Comptes Rendus Mécanique. Comptes rendus de l’Académie des sciences. Série IIb, Mécanique, 333(8).
2003
Da Silva, C. B., Balarac, G., & Métais, O. (2003). Transition in high velocity ratio coaxial jets analyzed direct numerical simulations. Journal of Turbulence, 4(24).

Patents

2018
Achard, J. - L., Balarac, G., Barre, S., & Maurice, G. (2018). Eolienne flottante à turbines jumelles à axe vertical et architecture optimisée. France.
Achard, J. - L., Balarac, G., Barre, S., & Maurice, G. (2018). Eolienne terrestre rabattable à axe vertical à grande rusticité et faible coût. France.
Achard, J. - L., Balarac, G., Barre, S., & Maurice, G. (2018). Système de transmission par lien souple pour l’entrainement d’une génératrice unique sur une éolienne flottante à turbines jumelles à axes verticaux. France.
2017
Achard, J. - L., & Balarac, G. (2017). Centrale hydroélectrique flottante pour rivières peu profondes. France.

Conference Proceedings

2019
Bellec, M., Bieder, U., Luchier, N., Moro, J. - P., Girard, A., & Balarac, G. (2019). Simulation des Grandes Échelles d’un écoulement d’air turbulent pour le refroidissement d’amplificateurs de lasers. In 24ème Congrès Français de Mécanique. Brest, France.
Bellec, M., Luchier, N., Balarac, G., Bieder, U., & Girard, A. (2019). Numerical study of the cryogenic cooling of amplifiers for high power lasers. In The 14th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT). Wicklow, Ireland.
Dagaut, J., Balarac, G., Negretti, M. - E., & Brun, C. (2019). Transition to turbulence in Görtler flows.Large Eddy Simulations (LES) of a Blasius boundary layer over a curved wall. In 17th European Turbulence Conference. Turin, Italy.
Sahut, G., Ghigliotti, G., Bégou, P., Marty, P., & Balarac, G. (2019). Numerical simulation of boiling on 3D unstructured grids. In ICMFHT’19 – 4th International Conference on Multiphase Flow and Heat Transfer. Rome, Italy.
2018
Achard, J. - L., Maurice, G., Balarac, G., & Barre, S. (2018). Une nouvelle Eolienne Flottante à Axe Vertical. Le projet OWLWIND. In GDR CNRS 3763 EMR (Energies Marines Renouvelables) ”Composants innovants et concepts en rupture pour la récupération des EMRs”. Lyon, France.
Sahut, G., Ghigliotti, G., Marty, P., & Balarac, G. (2018). Numerical Simulation of Boiling. In DTPF – Dispersed Two-Phase Flows. Toulouse, France.
2017
Achard, J. - L., Maurice, G., Barre, S., & Balarac, G. (2017). Floating Vertical Axis Wind Turbine : OWLWIND Project. In 8th International Conference on Energy and Environment, CIEM. Bucharest, Romania.
Chakravarthy, R. V. K., Balarac, G., & Métais, O. (2017). Dynamics of coaxial swirling jets. In European Turbulence Conference 16. Stockholm, Sweden.
Maurice, G., Barre, S., Balarac, G., & Achard, J. - L. (2017). Sur l’influence des trainées parasites dans le design des éoliennes à axe vertical. In 23ème Congrès Français de Mécanique. Lille, France.
Pushkarev, A., Balarac, G., & Bos, W. J. T. (2017). Scaling of temperature fluctuations generated by frictional viscous heating. In European Turbulence Conference 16. Stockholm, Sweden.
Pushkarev, A., Bénard, P., Lartigue, G., Moureau, V., & Balarac, G. (2017). Numerical approach for simulation of moving bodies by using the dynamic mesh adaptation method within ALE technique. In ECCOMAS MSF 2017. Ljubljana, Slovenia.
2016
Guillaud, N., Balarac, G., Goncalvès Da Silva, E., & Zanette, J. (2016). Large eddy simulations on vertical axis hydrokinetic turbines and flow phenomena analysis. In 28th Symposium on Hydraulic Machinery and Systems, IAHR 2016. Grenoble, France.
Kunhappan, D., Dumont, P. J. J., Harthong, B., Balarac, G., & Chareyre, B. (2016). Numerical modelling of cellulose micro/nanofibril suspensions. In 24th International Congress of Theoretical and Applied Mechanics. Montreal, Canada.
Sikora, A., Balarac, G., Lagaert, J. - B., & Cottet, G. - H. (2016). Differential diffusion for high Schmidt and Reynolds numbers : a numerical study. In 11th European Fluid Mechanics Conference. Seville, Spain.
Wilhelm, S., Balarac, G., Métais, O., & Ségoufin, C. (2016). Head Losses Prediction and Analysis in a Bulb Turbine Draft Tube under different operating conditions using Unsteady Simulations. In 28th Symposium on Hydraulic Machinery and Systems, IAHR. Grenoble, France.
2015
Balarac, G., Bénard, P., Lartigue, G., Moureau, V., & Dobrzynski, C. (2015). Mesh adaptation for large-eddy simulations in complex geometries. In Direct and Large-Eddy Simulation 10. Limassol, Cyprus.
Decaix, J., Balarac, G., Dreyer, M., Farhat, M., & Munch, C. (2015). Influence of the tip gap size on the development of the tip-leakage vortex using Large Eddy Simulations. In European Turbulence Conference 15. Delft, Netherlands.
Guillaud, N., Balarac, G., & Goncalvès Da Silva, E. (2015). LES on a pitching airfoil : analysis of the aerodynamic coefficients unsteadiness. In 4th International Conference on Turbulence and Interactions. Cargèse, France.
Wilhelm, S., Balarac, G., Métais, O., & Ségoufin, C. (2015). Analysis of head losses in a turbine draft tube by means of 3D unsteady simulations. In Turbulence Heat and Mass Transfer 8. Sarajevo, Bosnia and Herzegovina.
2014
Capuano, F., Coppola, G., Balarac, G., Bae, J., & De Luca, L. (2014). A low-cost time-advancing strategy for energy-preserving turbulent simulations. In proceedings of the CTR Summer Program. Stanford, United States.
Capuano, F., Coppola, G., De Luca, L., & Balarac, G. (2014). A low-cost RK time advancing strategy for energy-preserving turbulent simulations. In 67th. Annual Meeting of the Division of Fluid Dynamics, American Physical Society. San Francsisco, United States.
Kessar, M., Balarac, G., & Plunian, F. (2014). Evaluation of turbulence models for Large Eddy Simulations of MHD turbulence. In 10th European Fluid Mechanics Conference. Copenhagen, Denmark.
Odier, N., Balarac, G., & Corre, C. E. (2014). Numerical simulations of a liquid sheet surrounded by a fast stream: interaction between phase interface dynamics and coherents vortices. In 10th European Fluid Mechanics Conference. Copenhagen, Denmark.
Vollant, A., Balarac, G., & Corre, C. E. (2014). Optimal subgrid scale model for passive scalar based on artificial neural network. In 10th European Fluid Mechanics Conference.. Copenhagen, Denmark.
Vollant, A., Balarac, G., Geraci, G., & Corre, C. E. (2014). Optimal estimator and artificial neural network as efficient tools for the subgrid-scale scalar flux modeling. In Proceedings of the Summer Program. Stanford, United States.
2013
Balarac, G., Cottet, G. - H., Etancelin, J. - M., Lagaert, J. - B., Pérignon, F., & Picard, C. (2013). Multi-scale problems, high performance computing and hybrid numerical methods. In M. Wakayama, & et al. (Eds.), The Impact of Applications on Mathematics -Proceedings of Forum “Math-for-Industry” (pp. 245–255). Mathematics for Industry (MFI), 1. Fukuoka, Japan: Springer.
2012
Balarac, G., Le Sommer, J., & Vollant, A. (2012). Subgrid-scale modeling of SGS scalar flux: a regularization of the gradient model. In Proceedings of the Summer Program 2012 (pp. 97–107). Stanford, United States.
Brugière, O., Balarac, G., Corre, C. E., Métais, O., Flores, E., & Leroy, P. (2012). Numerical optimization of a Francis turbine’s guide vane axis location including inflow uncertainties. In SimHydro 2012 : Nouvelles frontières de la simulation (pp. 1–8). Sophia-Antipolis, France.
Brugière, O., Balarac, G., Corre, C. E., Métais, O., Flores, E., & Leroy, P. (2012). Numerical prediction of a draft tube flow taking into account uncertain inlet conditions. In 26th IAHR Symposium on Hydraulic Machinery and Systems (pp. 1–8). Pékin, China.
Lagaert, J. - B., Balarac, G., Cottet, G. - H., & Bégou, P. (2012). Particle method: an efficient tool for direct numerical simulations of a high Schmidt number passive scalar in turbulent flow. In Summer Program 2012. Center of Turbulence Research (pp. 167–176). Stanford, United States.
Vollant, A., Balarac, G., & Corre, C. E. (2012). Passive scalar LES using an optimal estimator as SGS model. In 9th European Fluid Mechanics Conference. Rome, Italy.
2011
Congedo, P. M., Balarac, G., Corre, C. E., & Duprat, C. (2011). Effects of inlet uncertainties on prediction of turbulent flows using RANS and LES simulations. In 20th AIAA Computational Fluid Dynamics Conference. AIAA 2011-3869. Honolulu, Hawaii, USA, United States.
2010
Balarac, G., Kosovichev, A., Brugière, O., Wray, A., & Mansour, N. (2010). Modeling of the subgrid-scale term of the filtered magnetic field transport equation. In Proceedings of the Summer Program 2010. Stanford, United States: Stanford University.
Congedo, P. M., Brugière, O., Balarac, G., Métais, O., & Duprat, C. (2010). A wall model for LES of turbulent flows with/out pressure gradient. In ERCOFTAC Workshop Direct and Large Eddy Simulation 8. Eindhoven, Netherlands.
Duprat, C., Balarac, G., Métais, O., & Laverne, T. (2010). Large-eddy simulation calculation from experimental measurement. In 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems. Czech Republic.
Duprat, C., Tridon, S., Balarac, G., Barre, S., Métais, O., Ségoufin, C., et al. (2010). Numerical Simulation of Swirling Flow in Complex Hydroturbine Draft Tube using Large Eddy Simulation. In Fifth European Conference on Computational Fluid Dynamics ECCOMAS. Portugal.
2009
Balarac, G., Duprat, C., & Métais, O. (2009). LES of a high Reynolds number swirling flow in a conical diffuser. In Direct and Large-Eddy Simulations VII. Germany.
Cottet, G. - H., Balarac, G., & Coquerelle, M. (2009). Subgrid particle resolution for the turbulent transport of a passive scalar. In B. Eckhardt (Ed.), 12th EUROMECH European Turbulence Conference (pp. 779–782). Advances in Turbulence XII Proceedings of the 12th EUROMECH European Turbulence Conference, September 7-10, 2009, Marburg, 132. Marbourg, Germany: Springer.
Cottet, G. - H., Balarac, G., & Coquerelle, M. (2009). Subgrid particle resolution for the turbulent transport of a passive scalar. In B. Eckhardt (Ed.), 12th EUROMECH European Turbulence Conference (pp. 779–782). Springer Proceedings in Physics, 132. Marburg, Germany: Springer.
Duprat, C., Balarac, G., & Métais, O. (2009). Simulation des grandes échelles dans un aspirateur de centrale hydraulique. In Congrès Français de Mécanique. France.
Duprat, C., Balarac, G., & Métais, O. (2009). Wall boundary conditions in large-eddy simulation for high Reynolds number flow with pressure gradient. In Colloquium of the European Mechanics. Germany.
Duprat, C., Balarac, G., Métais, O., Tridon, S., Barre, S., Ciocan, G. D., et al. (2009). Large-eddy simulation of draft tube flow and validation from experimental measurements. In 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems. Czech Republic.
Kaul, C. M., Raman, V., Balarac, G., & Pitsch, H. (2009). A Posteriori analysis of numerical errors in computing scalar variance. In Quality and Reliability of Large-Eddy Simulations workshop. Italy.
Kaul, C. M., Raman, V., Balarac, G., & Pitsch, H. (2009). Numerical errors in scalar variance models for large eddy simulation. In Turbulent Shear Flow Phenomena VI. South Korea.
2008
Brun, C., Balarac, G., Da Silva, C. B., Petrovan Boiarciuc, M., & Métais, O. (2008). Subgrid-Scale modeling of scalars for large-eddy simulations of transitional flows. In 7th International ERCOFTAC Symposium on Engineering Turbulence Modeling and Measurements. Limassol, Crète, Greece.
2005
Balarac, G., Si-Ameur, M., Lesieur, M., & Métais, O. (2005). Direct numerical simulations of coaxial jets mixing properties. In 4th Turbulent shear flow phenomena. WILLIAMSBURG, United States.
Balarac, G., Si-Ameur, M., Lesieur, M., & Métais, O. (2005). Mélange dans les jets coaxiaux : simulations instationnaires. In Colloque d’Aérodynamique appliquée. TOULOUSE, France.
Balarac, G., Si-Ameur, M., Métais, O., & Lesieur, M. (2005). Large-eddy simulation of coaxial jets : coherent structures and mixing properties. In ERCOFTAC Workshop – Direct and large-eddy simulation VI. POITIERS, France.
2004
Balarac, G., & Métais, O. (2004). Coherent vortices in coaxial jets. In C. I. M. N. E. /B. Publishers (Ed.), ETC 10 (pp. 149–152). TRONDHEIM, Norway: Anderson and P.A. Krogstad (eds).

Ph.D. Theses

2006
Balarac, G. (2006). Numerical study of vortex dynamics and mixing in turbulent coaxial jets. Ph.D. thesis, Institut National Polytechnique de Grenoble - INPG, .

Book Contributions

2015
Decaix, J., Balarac, G., & Munch, C. (2015). Rans Computations of a Cavitating Tip Vortex. In Advances in Hydroinformatics.