Work

Drag reduction during the side-by-side motion of a pair of intruders in a granular medium

Year: 2024

Type: article

Abstract: When multiple intruders move through a granular material, complex grain-mediated interactions can arise between them. In this study, we experimentally investigate the case of two spheres moving side by side in a granular medium, focusing on how their interaction affects the drag force experienced by each sphere. Our results show that the presence of a neighboring sphere reduces the drag on the first sphere, with this reduction becoming more significant as the spheres are closer to each other. Furthermore, the amount of relative drag reduction is observed to increase with the intruders' depth in the granular medium.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.9.114303

Authors: D. D. Carvalho, Y. Bertho, A. Seguin, E. M. Franklin, B. Darbois Texier

Institutions: Universidade Estadual de Campinas (UNICAMP), Université Paris-Saclay

Language: English

Topic: Granular flow and fluidized beds

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Fundação de Amparo à Pesquisa do Estado de São Paulo

Awards: G3097330296, G3580520908, G5960408532, Modeling of dense granular flows: experiments, numerical simulations and stability analyses