Modelagem e simulação tridimensional transiente do escoamento gas-solido

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The three-dimensional (3-D) gas-solid model employed in this work presumes the inviscid behavior of the solid phase, commonly used as simplifier hypothesis in the problem solutions of the dilute gas-solid flow. It is intended in this work to apply and corroborate the 3-D, transient, inviscid model, for the horizontal and vertical partic1e conveying, by comparing the numerical results with experimental data, obtained with PDA ("Phase Doppler Anemometer") technique presented in the literature. For the solutions of the parcial diferencial equation models was employed the commercial code CFD, the CFX 4.4 developed by ABA Technology, based on the numerical method of finite volumes for the numerical discretization. The pressure-velocity coupling by SIMPLEC algorithm, k-g turbulence default model and several order diferencial scheme, were used as strategies to guarantee convergency and stability of the numerical solution. The results reason compare with literature data, show a good agreement, making sure future model applications for industrial cases. A study in the cement industry, specifically the tertiary air flowing from the kiln to the ca1ciner, was made with the objective of determining the effect of a self cleaning elbow in the horizontal transport section, over the partic1e distribution in the duct transversal section, as so, minimizing particles rope formation in the bottom of the duct, as observed in practice. Animations of the solid volume fraction field formation show that the self-c1eaning elbow promotes a solid phase redistribution in the transversal section, being, as consequence, be used as measure to prolong the useful life of the tertiary duct

ASSUNTO(S)

metodo dos volumes finitos dinamica dos fluidos modelos matematicos metodos de simulação escoamento bifasico escoamento turbulento

ACESSO AO ARTIGO

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