2005
DOI: 10.1590/s0104-66322005000200014
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Abstract: -The spouted bed has been used in drying, granulation, catalytic polymerization, residue treatment and coating of several materials. Its success is attributed to its solids circulation characteristics and excellent gas-particle contact. In this work the pattern of solids and gas flows in a spouted bed was numerically simulated using a Eulerian multiphase model. The computational work was significantly reduced for axisymmetric gas-solids flows. The simulated velocity and voidage profiles were compared with resu… Show more

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Cited by 58 publications
(49 citation statements)
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“…Reasons for the raise in superficial gas velocity, compared to V1, are depending on the evolving flow pattern in the lower main reaction zone, the conical part, of V2. The ratio of 1:3 between the reaction tube diameter in the lower part (segment 1 and 2) and the main reaction zone diameter (segment 3 and 4), the angle of the conical widening and the set gas velocities combined with the powdery feedstock are causing the formation of a spouted bed, as described by Duarte et al [28]. The bed consists of an annular moving-bed and a fast fluidized central flow with recurrent particle throw-offs.…”
Section: Particle Separation and Formation Of Flow Pattern Below The mentioning
confidence: 96%
“…Reasons for the raise in superficial gas velocity, compared to V1, are depending on the evolving flow pattern in the lower main reaction zone, the conical part, of V2. The ratio of 1:3 between the reaction tube diameter in the lower part (segment 1 and 2) and the main reaction zone diameter (segment 3 and 4), the angle of the conical widening and the set gas velocities combined with the powdery feedstock are causing the formation of a spouted bed, as described by Duarte et al [28]. The bed consists of an annular moving-bed and a fast fluidized central flow with recurrent particle throw-offs.…”
Section: Particle Separation and Formation Of Flow Pattern Below The mentioning
confidence: 96%
“…A abordagem multifásica Euler-Euler, juntamente com a teoria cinética do escoamento granular, utilizada no presente trabalho, é descrita com detalhes por Duarte et al (2005).…”
Section: Metodologia Numéricaunclassified
“…Alguns trabalhos na literatura vêm demostrando a viabilidade em se estudar escoamentos Área temática: Fenômenos de Transporte e Sistemas Particuladosgranulares por meio de uma técnica não intrusiva composta por uma câmera de alta velocidade (Duarte et al, 2005). Após a gravação do escoamento granular, a velocidade da partícula é calculada baseando-se na distância percorrida e no respectivo número de frames.…”
Section: Introductionunclassified
“…Os parâmetros fluidodinâmicos de maior importância no estudo do regime de jorros são: a velocidade mínima de jorro, a altura máxima de jorro estável e a perda de carga em função da velocidade do ar (MARRETO, 2006) Trabalhos referentes à simulação CFD de partículas em leitos de jorro são encontrados na literatura. Duarte et al (2005), por exemplo, descreveram a fluidodinâmica das partículas e do gás no interior de um leito de jorro usando uma Modelagem Euleriana Granular Multifásica. Seus resultados simulados foram comparados com dados experimentais obtidos em laboratório e com os resultados de HE et al (1994a,b), demonstrando uma boa correlação entre ambos.…”
Section: Introductionunclassified