Source: https://www.proceedings.blucher.com.br/article-details/efeito-de-parede-na-queda-de-presso-em-leitos-fixos-de-partculas-de-carvo-28615
Timestamp: 2019-04-22 16:12:47+00:00

Document:
Foram estudados experimentalmente o efeito de parede sobre a queda depressão no escoamento de ar em um leito fixo de partículas de carvão mineral com trêsrazões D/dp (diâmetro da coluna/diâmetro de partícula), 17,7; 21,4 e 26,2. Foramusados três modelos teóricos que consideram o efeito de parede para o ajuste dos dadosexperimentais; modelo de: Einsfield, Cheng e Foumeny. O modelo de Cheng apresentouo melhor ajuste. Os resultados também revelaram que a medida que a razão D/dpdiminui, a queda de pressão, assim como, o efeito de fricção, também diminuem. Apermeabilidade aumentou consideravelmente quando a razão D/dp diminuiu.
 CHENG N.-S, Wall effect on pressure drop in packed beds, Pow Tec, v. 210 p. 261–266, 201 DUKHAN N., BAĞCI Ö., ÖZDEMIR M, Experimental flow in various porous media and reconciliation of Forchheimer and Ergun relations, Exp. The Flu Sci. v.57, p. 425–433, 2014. EISFIELD B., SCHNITZLEIN K, The influence of confining walls on the pressure drop in packed beds, Chem Eng Sci v. 56 (14), p. 4321–4329, 200 ERGUM S, 1952. Fluid flow through packed columns. Chem Eng Pro, v. 48(2), p. 89-94. FOUMENY E.A., BENYAHIA F., CASTRO J.A.A., MOALLEMI H.A., ROSHANI S, Correlations of pressure drop in packed-beds taking into account the effect of confining wall, Int. J. Heat Mass Transf. v. 36 (2), p. 536–540, 1993. KECECIOGLU, I., JIANG, Y, Flow through porous media of packed spheres saturated with water. J of Fluids Eng, v. 116(1), p. 164-170, 1994. TIAN F.-Y., HUANG L.-F., FAN L.-W., QIAN H.-L., YU Z.-T, Wall effects on the pressure drop in packed beds of irregularly shaped sintered ore particles, Pow Tec; v. 301, p. 1284–1293, 2016.
FERRAZ, J; CORREIA, M. V; HUERTAS, J. O; "EFEITO DE PAREDE NA QUEDA DE PRESSÃO EM LEITOS FIXOS DE PARTÍCULAS DE CARVÃO", p. 814-817 . In: . São Paulo: Blucher, 2018.
CHENG N.-S, Wall effect on pressure drop in packed beds, Pow Tec, v. 210 p. 261–266, 2011. DUKHAN N., BAĞCI Ö., ÖZDEMIR M, Experimental flow in various porous media and reconciliation of Forchheimer and Ergun relations, Exp. The Flu Sci. v.57, p. 425–433, 2014. EISFIELD B., SCHNITZLEIN K, The influence of confining walls on the pressure drop in packed beds, Chem Eng Sci v. 56 (14), p. 4321–4329, 2001. ERGUM S, 1952. Fluid flow through packed columns. Chem Eng Pro, v. 48(2), p. 89-94. FOUMENY E.A., BENYAHIA F., CASTRO J.A.A., MOALLEMI H.A., ROSHANI S, Correlations of pressure drop in packed-beds taking into account the effect of confining wall, Int. J. Heat Mass Transf. v. 36 (2), p. 536–540, 1993. KECECIOGLU, I., JIANG, Y, Flow through porous media of packed spheres saturated with water. J of Fluids Eng, v. 116(1), p. 164-170, 1994. TIAN F.-Y., HUANG L.-F., FAN L.-W., QIAN H.-L., YU Z.-T, Wall effects on the pressure drop in packed beds of irregularly shaped sintered ore particles, Pow Tec; v. 301, p. 1284–1293, 2016.

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