Crystallization and jamming in narrow fluidized beds

Fernando David Cúñez; Erick M. Franklin

Crystallization and jamming in narrow fluidized beds

Fernando David Cúñez, Erick M. Franklin

Material

ARTIGO

Idioma

Inglês

Nota geral

Agradecimentos: F.D.C. is grateful to FAPESP (Grant Nos. 2016/18189-0 and 2018/23838-3), and E.M.F. would like to express his gratitude to FAPESP (Grant No. 2018/14981-7) and to CNPq (Grant No. 400284/2016-2) for the financial support they provided

Resumo Abstract: A fluidized bed is basically a suspension of granular material by an ascending fluid in a tube, and it has a rich dynamics that includes clustering and pattern formation. When the ratio between the tube and grain diameters is small, different behaviors can be induced by high confinement... Ver mais Abstract: A fluidized bed is basically a suspension of granular material by an ascending fluid in a tube, and it has a rich dynamics that includes clustering and pattern formation. When the ratio between the tube and grain diameters is small, different behaviors can be induced by high confinement effects. Some unexpected and curious behaviors that we investigate in this paper are the crystallization and jamming of grains in liquids with velocities higher than those for incipient fluidization, supposed to maintain the grains fluidized. In our experiments, performed in a vertical tube of transparent material, different grains, water velocities, resting times, and velocity decelerations were used. An analysis of the bed evolution based on image processing shows that, after a decreasing flow that reaches a velocity still higher than that for incipient fluidization, grains become organized in lattice structures of high compactness, where they are trapped though with small fluctuations. These structures are initially localized and grow along time, in a similar manner as happens in phase transitions and glass formation. After a certain time, if the liquid velocity is slightly increased, jamming occurs, with grains being completely blocked and their fluctuation disappearing. We show that different lattice structures appear depending on the grain type. Our results provide new insights into fluidization conditions, glass-like formation, and jamming Ver menos

Nota de informação sobre financiamento

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2018/14981-7; 2016/18189-0; 2018/23838-3

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

400284/2016-2

Direito de acesso

Fechado

Assuntos

Leito fluidizado

Artigo original

Autoria

Cúñez Benalcázar, Fernando David, 1989- Autor

Franklin, Erick de Moraes, 1974- Autor

Sites

DOI: https://doi.org/10.1063/5.0015410

Texto completo: https://aip.scitation.org/doi/abs/10.1063/5.0015410

Crystallization and jamming in narrow fluidized beds

Fernando David Cúñez, Erick M. Franklin

Crystallization and jamming in narrow fluidized beds

Fernando David Cúñez, Erick M. Franklin

Fontes

Physics of fluids Vol. 32 (2020), n. art. 083303

Terminal de consulta web

Crystallization and jamming in narrow fluidized beds

Crystallization and jamming in narrow fluidized beds

Crystallization and jamming in narrow fluidized beds

Fontes