Solid-liquid fluidized beds: fluid flow, grain dynamics and pattern formation
Initial instabilities of gravitational flows of non-newtonian liquids
The transport of grains as bed-load and the instabilities of a granular bed
| Grant number: | 16/13474-9 |
| Support Opportunities: | Regular Research Grants |
| Start date: | March 01, 2017 |
| End date: | February 28, 2019 |
| Field of knowledge: | Engineering - Mechanical Engineering - Transport Phenomena |
| Principal Investigator: | Erick de Moraes Franklin |
| Grantee: | Erick de Moraes Franklin |
| Host Institution: | Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
Abstract
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)
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