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Instabilities on dense granular flows

Grant number: 16/13474-9
Support type:Regular Research Grants
Duration: March 01, 2017 - February 28, 2019
Field of knowledge:Engineering - Mechanical Engineering
Principal Investigator:Erick de Moraes Franklin
Grantee:Erick de Moraes Franklin
Home Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Granular media are formed by a significant amount of solids (grains), and they are abundant on the Earth surface: 20% of emerged lands consist of sand and other grains. In addition, the world production of grains is of approximately 10 billions tons (metric) by year, and their processing consumes roughly 10% of all the energy produced worldwide. The transport of granular matter by gravity, by solid shear, or by a shearing fluid is frequently found in both nature and industry. In nature, it is present in the erosion of river banks, in the formation and migration of dunes in deserts, and in avalanches and landslides, for example. In industry, it is present in the petroleum extraction, in pharmaceutical processes, in agro-food processes, and in pollution dispersion processes. Therefore, a better knowledge of dense granular flows and of the associated instabilities is of importance to understand nature and to control industrial processes involving grains. Although of importance for many scientific domains, dense granular flows and their instabilities are not well understood. This project proposes a theoretical and experimental study concerning the physics of granular media, the transport of granular media in dense regime, and the instabilities of dense granular flows. The experiments will be performed in different configurations (confined and free surface granular flows, with and without a fluid flow, etc.). Based on the experimental results and on methods of applied mathematics, theoretical models will be proposed for the problem. The main objective is to identify the fundamental similarities and differences in order to search for a unification of physical models applied to different dense granular flows. (AU)

Articles published in Agência FAPESP Newsletter about the research grant
Research helps in understanding the dynamics of dune formation 

Scientific publications (7)
(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)
WENZEL, JOAO LUIZ; FRANKLIN, ERICK DE MORAES. Velocity fields and particle trajectories for bed load over subaqueous barchan dunes. GRANULAR MATTER, v. 21, n. 3 AUG 2019. Web of Science Citations: 0.
CUNEZ, FERNANDO DAVID; FRANKLIN, ERICK. Plug regime in water fluidized beds in very narrow tubes. Powder Technology, v. 345, p. 234-246, MAR 1 2019. Web of Science Citations: 0.
ALVAREZ, CARLOS A.; FRANKLIN, ERICK M. Role of Transverse Displacements in the Formation of Subaqueous Barchan Dunes. Physical Review Letters, v. 121, n. 16 OCT 19 2018. Web of Science Citations: 1.
CHIMETTA, BRUNO PELISSON; HOSSAIN, MOHAMMAD ZAKIR; FRANKLIN, ERICK DE MORAES. Numerical solution for Kapitza waves on a thin liquid film. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 40, n. 8 AUG 2018. Web of Science Citations: 0.
MELETTI DE OLIVEIRA, GABRIEL MALTESE; FRANKLIN, ERICK DE MORAES. Transitions between smooth and rough surfaces in turbulent channel flows for d- and k-type rough elements. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 40, n. 4 APR 2018. Web of Science Citations: 0.
CUNEZ, FERNANDO DAVID; GOMES DE OLIVEIRA, GABRIEL VICTOR; FRANKLIN, ERICK DE MORAES. Turbulent channel flow perturbed by triangular ripples. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 40, n. 3 MAR 2018. Web of Science Citations: 1.
ALVAREZ, CARLOS A.; FRANKLIN, ERICK M. Birth of a subaqueous barchan dune. Physical Review E, v. 96, n. 6 DEC 18 2017. Web of Science Citations: 3.

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