Measuring granular flows using digital image correlation

• Grant number: 24/13295-3
• Support Opportunities: Scholarships abroad - Research
• Start date: February 01, 2025
• End date: June 30, 2025
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Erick de Moraes Franklin
• Grantee: Erick de Moraes Franklin
• Host Investigator: Antoine Seguin
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Laboratoire Fluides, Automatique Et Systèmes Thermiques, France
• Associated research grant: 18/14981-7 - Modeling of dense granular flows: experiments, numerical simulations and stability analyses, AP.JP2

Abstract

Granular materials are important in our everyday lives, being frequently found in nature and industry. We find them, for instance, in mining and food industries, in the growth of roots in the ground, in the transport of sand and formation of dunes on Earth and Mars, and in the formation of craters by the impact of asteroids, to cite but a few examples. Given their importance, we have been studying these materials in our laboratory at UNICAMP, both numerically and experimentally, and we count with the JP2 FAPESP grant n. 2018/14981-7. We have succeeded in obtaining important findings, but there are some data processing techniques, mastered by Antoine Seguin and his group, that we need to acquire. This BPE project aims at developing new image processing strategies by using Digital Image Correlation (DIC) for granular systems. The strategies will suit the systems tested in our laboratories at UNICAMP, whether the grains are under slow deformations (quasistatic regime or creep motion) or more fast motion (inertial, dense regimes). The advantages of DIC are: (i) the computation of entire fields of displacements with good accuracy (instead of motions of individual particles), when compared to traditional tracking techniques; and (ii) lack of necessity of powerful and collimated lighting (usually lasers), when compared to traditional Particle Tracking Velocimetry (PIV). The development of those techniques and skills by the Brazilian PI will bring important contributions for the Brazilian laboratory and FAPESP grant 2018/14981-7. It will also be useful for experiments planned to be carried out in the Sirius accelerator late 2025 (in the scope of grant 2018/14981-7). To keep a short time abroad while carrying out the DIC research, we are asking a total period of 5 months.