Research Interests:

Granular matter
Bedforms (ripples and dunes)
Hydrodynamic stability
Perturbation Methods
Multiphase Flow

CFD-DEM simulation of an evolving dune (Phys. Rev. E 101, 012905, 2020)
Experiments (formation of a barchan dune: zirconium beads under a turbulent water flow)
Very-narrow fluidized bed: experiments and CFD-DEM simulations

DEM simulations of an intruder moving within a pack of solid disks (positions and contact chains)
CFD-DEM simulations of the hydraulic conveying of coarse grains through a narrow elbow

Video produced by Lauren Lipuma at AGU and uploaded on youtube (with sound, please turn on the speakers!). Complete work: Assis, W.R. and Franklin, E.M., A comprehensive picture for binary interactions of subaqueous barchans. Geophysical Research Letters, 47, e2020GL089464, 2020,