Mimicking layer inversion in solid-liquid fluidized beds in narrow tubes

Autor(es)

Cunez, Fernando David ^[1] ; Franklin, Erick M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Mech Engn, UNICAMP, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Powder Technology; v. 364, p. 994-1008, MAR 15 2020.
• Citações Web of Science: 0

Resumo

This paper investigates experimentally and numerically the dynamics of solid particles during the layer inversion of binary solid-liquid fluidized beds in narrow tubes. Layer inversion can happen in solid classifiers and biological reactors, where different solid particles coexist and segregation by diameter and density occurs. The fluidized beds were formed in a 25.4 mm-ID pipe and consisted of alumina and aluminum beads with diameters of 6 and 4.8 mm, respectively. We placed initially the lighter particles on the bottom in order to force an inversion of layers, mimicking the layer inversion mechanism. In the experiments, we filmed the bed with a high-speed camera and tracked individual beads along images, while in numerical simulations we computed the bed evolution with a CFD-DEM (computational fluid dynamics - discrete element method) code. We found the distances traveled by individual particles during the inversion and the characteristic time for layer inversion. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/18189-0 - Leito fluidizado em meio líquido em tubos finos: dinâmica e instabilidades
• Beneficiário: Fernando David Cúñez Benalcázar
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/13474-9 - Instabilidades em escoamentos granulares densos
• Beneficiário: Erick de Moraes Franklin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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