Alexandre Valance

Directeur de Recherche CNRS

A Valloire

E-mail : 

Téléphone :  +33 223235599

Bureau :  Bât. 11A, bureau 131

  1. Thématiques de recherche
  2. Projets en cours
  3. Publications à venir
  4. Publications 2018-2020
  5. Outils expérimentaux et numériques

Thématiques de recherche

  • Ecoulements granulaires, Ecoulements fluide-particules
  • Transport éolien du sable, transport fuviatile
  • Morhpohodynamique des dunes de sable
  • Morhophogenèse, Dynamique non-linéaire et chaos

Projets en cours

  • ANR SONO (2017-2021): "Marying coastal Safety objectives with natural development of sand dunes". Partenaires: EPOC, IPGP, ONF.
  • ANR SEGSED (2016-2020): "Segregation in sediment transport". Partenaires: IRSTEA Grenoble, LEGI.

Publications à venir

  • S. Kiki, N. Le Dantec, A. Valance (2021). Two-dimensional subaqueous dunes: scaling laws and saturation length (Preprint).
  • J.-L. Ralaiarisoa,, P. Dupont, A. Ould El. Moctar, F. Naaim, A. Valance (2021). Particle impact on a cohesive granular packing (Preprint).
  • A. Neveu, R. Delannay, A. Valance, J. Jenkins and M. Larcher. (2021). Segregation patterns in high-speed granular flows (Preprint).
  • G. Minster , F. Floc’h, A. Valance, N. Le Dantec , A. Nicolle, B. Zerr, (2021). Saltation in extreme currents : An experimental study. Sousmis à JGR.
  • P. Richard, A. Valance, R. Delannay, P. Boltenhagen (2021). Granular flows confined between flat,frictional walls. Part I: Simulations and
    experiments. Soumis à JFM.
  • O. Roche, S. van den Wildenberg, A. Valance, R. Delannay, A. Mangeney, L. Corna, T. Latchimy (2020). Experimental assessment of the effective friction at the base of granular chute flows on smooth incline. Soumis à Physical Review E.

Publications 2018-2020

  • Y. Zhu, R. Delannay, A. Valance (2020). High-speed confined granular flows donw smooth inclines: scaling and wall friction law  (2020). Granular Matter 22:82. https://doi.org/10.1007/s10035-020-01053-7
  • P. Richard, R. Artoni, A. Valance, R. Delannay (2020). Influence of lateral confinement on granular flows: comparison between shear‐driven and gravity‐driven flows. Granular Matter 22:81. https://doi.org/10.1007/s10035-020-01057-3
  • J.-L. Ralaiarisoa, J.-B. Besnard, B. Furieri, P. Dupont, A. Ould El. Moctar, F. Naaim, A. Valance (2020). Transition from saltation to collisional regime in wind-blown sand. Physical Review Letters 124, 198501.https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.198501
  • Castelle, B.; Laporte-Fauret, Q.; Marieu, V.; Michalet, R.; Rosebery, D.; Bujan, S.; Lubac, B.; Bernard, J.-B.; Valance, A.; Dupont, P.; Ould El Moctar, A.; Narteau, C. Nature-Based Solution along High-Energy Eroding Sandy Coasts: Preliminary Tests on the Reinstatement of Natural Dynamics in Reprofiled Coastal Dunes. Water 2019, 11, 2518. https://doi.org/10.3390/w11122518
  • M.-C. Ferreira, B. Furieri, B., J.M Santos, J.-L. Harion, Ould El Moctar, A, Valance, P. Dupont et al. (2019). An experimental and numerical study of the aeolian erosion of isolated and successive piles. Environ Fluid Mech. https://doi.org/10.1007/s10652-019-09702-z
  • Bruno Furieri, Maria Clara Caliman, Alexandre Valance et al. (2019). A simple model to estimate emission of wind-blown particles from a granular bed in comparison to wind tunnel experiments. Geomorphology. https://doi.org/10.1016/j.geomorph.2019.03.004
  • Selmani, H., Valance, A., Ould El Moctar, A., Dupont, P., & Zegadi, R. (2018). Aeolian sand transport in out-of-equilibrium regimes. Geophysical Research Letters, 45. https://doi.org/10.1002/2017GL076937
  • J. T. Jenkins & A. Valance (2018). Two-phase continuum theory of wind blown sand. Phys. Rev. Fluid. https://doi.org/10.1103/PhysRevFluids.3.034305
  • S. Belkacem, F, Ould Kaddour and A. Valance (2018). Spreading of a granular droplet under horizontal vibrations. Phys. Rev. E. https://link.aps.org/doi/10.1103/PhysRevE.97.062903

Outils expérimentaux et numériques

 

Particle tracking velocimetry for wind blown sand

 

DEM simulations of supported flows