Advanced search
Start date
Betweenand

Modeling of dense granular flows: experiments, numerical simulations and stability analyses

Abstract

The flow of granular matter in dense regime is frequently found in both nature and industry. In nature, some examples are the erosion of river banks, the formation and migration of dunes in deserts, and landslides, for example. In industry, it occurs in pharmaceutical, agro-food, and pollution dispersion processes. Although of practical importance, dense granular flows are not well understood. This project proposes an experimental, numerical and theoretical study concerning the physics of granular flows in dense regime, and their interaction with fluids. The experiments will be performed in different configurations (granular beds sheared by a fluid, fluidized beds, and gravitational flows). For the experiments, we will film the different granular flows with a high-speed camera, and automatically identify and track the grains and clusters along images by using numerical scripts. In addition, when in the presence of liquids, the fluid instantaneous velocities will be measured with PIV (Particle Image Velocimetry), and flow visualization. For the numerical part, we will perform simulations using a coupled CFD-DEM (computational fluid dynamics - discrete element method) code. For the analytical part, stability analysis and perturbation methods will be employed. The objective is to identify and measure the mechanisms involved in each flow configuration, such as particle-particle shocks and friction, pressure and viscous drags, virtual mass force, and particle-wall shocks and friction, and then search for new physical models applied to an ensemble of grains for different dense granular flows. This project is an extension a FAPESP grant coordinated by the proponent (FAPESP Proccess n. 2016/13474-9); therefore, some of the information herein is found in the referred process. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
More itemsLess items
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Scientific publications (11)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SCHNORR FILHO, ELMAR ANTON; LIMA, NICOLAO CERQUEIRA; FRANKLIN, ERICK M. Resolved CFD-DEM simulations of the hydraulic conveying of coarse grains through a very-narrow elbow. Powder Technology, v. 395, p. 811-821, JAN 2022. Web of Science Citations: 0.
ASSIS, W. R.; FRANKLIN, E. M. Morphodynamics of Barchan-Barchan Interactions Investigated at the Grain Scale. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, v. 126, n. 8 AUG 2021. Web of Science Citations: 0.
ALVAREZ, CARLOS A.; CUNEZ, FERNANDO DAVID; FRANKLIN, ERICK M. Growth of barchan dunes of bidispersed granular mixtures. Physics of Fluids, v. 33, n. 5 MAY 2021. Web of Science Citations: 0.
CUNEZ, FERNANDO DAVID; LIMA, NICOLAO CERQUEIRA; FRANKLIN, ERICK M. Motion and clustering of bonded particles in narrow solid-liquid fluidized beds. Physics of Fluids, v. 33, n. 2 FEB 1 2021. Web of Science Citations: 0.
ALVAREZ, CARLOS A.; FRANKLIN, ERICK M. Force distribution within a barchan dune. Physics of Fluids, v. 33, n. 1 JAN 1 2021. Web of Science Citations: 0.
ASSIS, W. R.; FRANKLIN, E. M. A Comprehensive Picture for Binary Interactions of Subaqueous Barchans. Geophysical Research Letters, v. 47, n. 18 SEP 28 2020. Web of Science Citations: 1.
CUNEZ, FERNANDO DAVID; FRANKLIN, ERICK M. Crystallization and jamming in narrow fluidized beds. Physics of Fluids, v. 32, n. 8 AUG 1 2020. Web of Science Citations: 0.
CHIMETTA, BRUNO PELISSON; FRANKLIN, ERICK. An analytical comprehensive solution for the superficial waves appearing in gravity-driven flows of liquid films. ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, v. 71, n. 4 JUL 4 2020. Web of Science Citations: 0.
CUNEZ, FERNANDO DAVID; FRANKLIN, ERICK M. Mimicking layer inversion in solid-liquid fluidized beds in narrow tubes. Powder Technology, v. 364, p. 994-1008, MAR 15 2020. Web of Science Citations: 0.
ALVAREZ, CARLOS A.; FRANKLIN, ERICK M. Shape evolution of numerically obtained subaqueous barchan dunes. Physical Review E, v. 101, n. 1 JAN 21 2020. Web of Science Citations: 0.
ALVAREZ, CARLOS A.; FRANKLIN, ERICK M. Horns of subaqueous barchan dunes: A study at the grain scale. Physical Review E, v. 100, n. 4 OCT 9 2019. Web of Science Citations: 1.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.