7 papers
Barchan-barchan and barchan-obstacle interactions: insights from grain-scale studies
Erick de Moraes Franklin, Willian Righi Assis, Danilo da Silva Borges +1
Sand dunes are bedforms that grow due to the action of a fluid flow over a sand bed or pile. Whenever the fluid flow is mainly in one direction and the availability of sand is limi…
Undulatory forcing of an intruder through granular media: effects of frequency and packing fraction
Douglas Daniel de Carvalho, Erick de Moraes Franklin
We investigate the motion amid grains of an intruder undergoing an imposed force that oscillates with a given frequency. For that, we made use of discrete numerical simulations whe…
Formation of cylindrical shells via sphere packing from fluidized beds
VinÃcius Pereira da Silva Oliveira, Danilo da Silva Borges, Erick de Moraes Franklin +1
The results of a numerical investigation of fluidized beds of spherical particles in a narrow vertical cylindrical pipe, with particular attention to the spontaneous settling along…
When barchan dunes move over craters
Paulo Vitor Ribeiro Plácido, Danilo da Silva Borges, Willian Righi Assis +1
We investigate the possible outcomes of a subaqueous barchan moving over a crater-like depression in the bed. For that, we carried out experiments where we varied the dune size, cr…
Role of Friction on the Formation of Confined Granular Structures
VinÃcius Pereira da S. Oliveira, Danilo S. Borges, Erick M. Franklin +1
Unstable systems of fluidized grains in a very-narrow vertical tube can auto-defluidize after some time, the settling particles forming either a glass- or crystal-like structure. W…
Barchans interacting with dune-size obstacles: details of the fluid flow and motion of grains
Nicolao Cerqueira Lima, Willian Righi Assis, Danilo da Silva Borges +1
We investigate details of the interaction of subaqueous barchans with dune-size obstacles by carrying out numerical simulations where the fluid is solved at the grain scale and the…