| Texto completo | |
| Autor(es): |
Carvalho, D. D.
;
Bertho, Y.
;
Seguin, A.
;
Franklin, E. M.
;
Texier, B. Darbois
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW FLUIDS; v. 9, n. 11, p. 13-pg., 2024-11-19. |
| Resumo | |
When several intruders move in a granular medium, coupling effects are observed, the motion of one intruder affecting that of others. In this paper, we investigate experimentally how the drag forces acting on a pair of spherical intruders moving amid grains at constant velocity vary with the transverse separation between them and their depth. When intruders are sufficiently far apart, they do not influence each other, and the average drag felt by each of them matches that of a single intruder. However, for small distances between intruders and at a given depth, the average drag per intruder decreases, highlighting a collaborative effect that facilitates motion. This collaboration effect is amplified when the depth of the intruders increases. We propose a model for the drag reduction of a pair of intruders based on the breakup of contact chains, caused by the perturbation generated by the neighbor intruder. Our findings provide new insights into the interaction effects on the motion of solids in sand, such as those observed in animal locomotion, root growth, and soil survey. (AU) | |
| Processo FAPESP: | 18/14981-7 - Modelagem de escoamentos granulares densos: experimentos, simulações numéricas e análises de estabilidade |
| Beneficiário: | Erick de Moraes Franklin |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2 |
| Processo FAPESP: | 20/04151-7 - Deslocamento de um intruso em um meio granular |
| Beneficiário: | Douglas Daniel de Carvalho |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 22/12511-9 - Movimento e impacto de corpos sólidos em meios granulares |
| Beneficiário: | Douglas Daniel de Carvalho |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |