Fluid-dynamics evaluation in a conical spouted bed and characterization of foxtail millet seeds--颗粒学报PARTICUOLOGY

do Nascimento, L. D., Corumbá, L. G., Rocha, S. C. d. S., Taranto, O. P., Costa, C. M. L., & de Faria, L. J. G. (2015). Fluid-dynamics evaluation in a conical spouted bed and characterization of foxtail millet seeds. Particuology, 23, 75-81. https://doi.org/10.1016/j.partic.2015.01.009

Fluid-dynamics evaluation in a conical spouted bed and characterization of foxtail millet seeds

Lidiane Diniz do Nascimento ^a *, Lorena Gomes Corumbá ^a, Sandra Cristina dos Santos Rocha ^b, Osvaldir Pereira Taranto ^b, Cristiane Maria Leal Costa ^a, Lênio José Guerreiro de Faria ^a

a Federal University of Pará, Faculty of Chemical Engineering, Laboratory of Drying and Particle Coating, Augusto Correa Street w/n, 66075-110 Belém, PA, Brazil
b University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, São Paulo, Brazil

10.1016/j.partic.2015.01.009

Volume 23, December 2015, Pages 75-81

Received 14 November 2014, Revised 16 January 2015, Accepted 28 January 2015, Available online 15 June 2015, Version of Record 2 December 2015.

E-mail: lidiane1610@gmail.com

Highlights

• The foxtail millet seeds were classified as solids of good fluidity.

• The seeds present good germinating capacity and elevated SGI in spouted bed.

• The seeds could be adequately processed in a spouted bed.

• U_ms, ΔP_M and ΔP_S could be estimated satisfactorily by empirical equations.

Abstract

Foxtail millet (Setaria italica) is one of the most valuable species in economic terms in the genus Setaria and plays an important role in human nutrition, animal feed, and agriculture. The present study described chemical, physical, and quality aspects of seeds of foxtail millet. Furthermore, the fluid-dynamic behavior of the seeds was evaluated in a conical spouted bed, which has advantages in terms of promoting the cyclic and regular movement of the seed particles. Dynamic parameters of spouting (minimum spouting velocity, stable and peak pressure drop) were determined and compared with those obtained from empirical correlations available in the literature. The results obtained from physical characterization showed that the seeds can be classified as belonging to Group D of Geldart, having a non-rough surface, mean diameter of 1.75 mm, and sphericity of 0.74. Fluid-dynamics analysis showed that the seeds are suitable for processing in a spouted bed, which is in agreement with the results of particle physical characterization.

Graphical abstract

Keywords

Foxtail millet; Parameters of spouting; Characterization; Conical spouted bed

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