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 2018-2019
  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

  • 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
  • Y. Zhu, R. Delannay, A. Valance (2020). Friction law in confined high-speed granular flows (2020). Soumis à Granular Matter.http://arxiv.org/abs/2005.09887
  • O. Roche, S. van den Wildenberg, A. Valance, R. Delannay, A. Mangeney, L. Corna, T. Latchimy (2020). Measurement of effective friction at the base of granular chute flows over a smooth incline. Soumis à Physical Review E.
  • J.-L. Ralaiarisoa,, P. Dupont, A. Ould El. Moctar, F. Naaim, A. Valance (2020). Particle impact on a cohesive granular packing (Preprint)
  • S. Kiki, N. Le Dantec, A. Valance (2020). Two-dimensional subaqueous dunes: scaling laws and saturation length (Preprint).
  • P. Richard, A. Valance, R. Delannay, P. Boltenhagen (2020). Granular flows confined between flat,frictional walls. Part I: Simulations and
    experiments (Preprint).
  • G. Minster , F. Floc’h, A. Valance, N. Le Dantec , A. Nicolle, Zerr1, (2020). Saltation in extreme currents : An experimental study (Preprint).
  • A. Neveu, R. Delannay and A. Valance. (2020). Segregation patterns in high-speed granular flows (Preprint).

Publications 2018-2019

  • 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