Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Velocity fields of grains over barchan dunes
Submission Author:
João Luiz Wenzel , SP , United States
Co-Authors:
João Luiz Wenzel, Erick de Moraes Franklin
Presenter: João Luiz Wenzel
doi://10.26678/ABCM.ENCIT2018.CIT18-0428
Abstract
This paper presents an experimental investigation of the field of grain velocities over subaqueous barchan dunes. The dunes were formed from initially conical piles consisting of spherical glass beads of known granulometry, and 2% of particles are tracers. In the beginning of each test run a determined mass of grains was placed on the bottom wall of a rectangular channel and it was entrained by a water turbulent flow. The experiment was filmed with a high-speed camera placed above the channel. An image processing code was written to determine the displacement of grains with an Eulerian approach.
Keywords
barchan dunes, Eulerian Approach, transport of solid particles, Turbulent flow
