Flow through Porous Media-the Ergun Equation Revisited

Macdonald, Ian; El-Sayed, MA; Mow, K.; Dullien, F. A. L.

doi:10.1021/i160071a001

Cited by 912 publications

(497 citation statements)

References 6 publications

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“…Basing their research on the same idea and working with several forms of spherical and nonspherical particles, a number of researchers have proposed different values for the numerical constants in Equation (2), but no relevant improvement has been achieved. A thorough review of this subject is presented by Macdonald et al (1979).…”

Section: Permeability Of Porous Mediamentioning

confidence: 99%

The influence of structural parameters on the permeability of ceramic foams

Moreira

Coury

2004

Braz. J. Chem. Eng.

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-Ceramic foams are a new structural material, characterized by a high porosity and a large surface area and made of megapores interconnected by filaments. This results in a structure with low resistance to fluid flow, making them appropriate for use as a filter. This work studies the influence of several structural parameters, such as porosity, tortuosity, surface area and pore diameter, in predicting the permeability of ceramic foams. Foams with different pore densities were used as porous media. Permeability was measured utilizing water as the flowing fluid. The results show that the predicted permeability scatters widely with the parameters under study. Pore diameter was the structural parameter that best represented the media. An Ergun-type correlation was fitted to the data and represented very well the permeability of the media in all foams under the experimental conditions studied.

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Section: Permeability Of Porous Mediamentioning

confidence: 99%

The influence of structural parameters on the permeability of ceramic foams

Moreira

Coury

2004

Braz. J. Chem. Eng.

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“…Provavelmente, uma maior concordância entre modelo e experimento ocorreria caso a tortuosidade efetiva dos concretos fosse considerada pela equação (C). Adicionalmente, foi mencionado que a constante k 2 é também influenciada pela rugosidade dos poros [10]. Neste caso, contudo, a faixa de variação proposta por esses autores (k 2 para poros rugosos sendo em geral metade do valor de k 2 para poros lisos) não coincidiu com a grande variação observada experimentalmente neste trabalho.…”

Section: Resultsunclassified

Previsão da permeabilidade a partir de propriedades físicas de concretos refratários

et al. 2002

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ResumoA caracterização física de um material cerâmico auxilia na avaliação do seu processamento e desempenho em altas temperaturas. Dentre as técnicas de avaliação microestrutural, três delas foram estudadas neste trabalho: método de imersão (Arquimedes), de expulsão de água e de intrusão de mercúrio. O objetivo do estudo foi o de avaliar quais delas fornecem parâmetros mais representativos para estimar as constantes de permeabilidade de concretos refratários auto-escoantes de alta alumina. Os valores de permeabilidade foram calculados pela equação de Ergun e comparados com resultados de permeabilidade obtidos experimentalmente. A estimativa da permeabilidade a partir da utilização conjunta de parâmetros obtidos pelos métodos de imersão (porosidade aparente) e de expulsão de água (diâmetro máximo de poro) se mostrou mais adequada que a obtida a partir de resultados fornecidos pela técnica de porosimetria de mercúrio. Palavras-chave: permeabilidade, porosimetria, microestrutura, concreto refratário, equação de Ergun. Abstract For refractory castables, permeability is a key property that rules both drying behavior during processing and infiltration of corrosive fluids during use at high temperatures. However, for an accurate permeability prediction, it is important that the structural physical parameters reliably represent the dynamic interaction between the percolating fluid and the porous channels. In this context, the aim of this work was to estimate the permeability constants of high-alumina refractory castables using parameters

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“…Macdonald et al 24 have proposed the use of modifi ed coeffi cients of 180 and 1.80 as more acceptable for particles of arbitrary shape instead of two constants 150 and 1.75 in equations (21). Ergun equation (21) applies to both the laminar and the turbulent fl ow regimes.…”

Section: The Methods Of Modellingmentioning

confidence: 99%

Modelling of heat transfer in a packed bed column

Pianko‐Oprych

2011

Polish Journal of Chemical Technology

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The CFD modelling of heat transfer in the packed bed column in the laminar and turbulent fl ow regimes has been presented. Three numerical grids with different densities were generated for the packed bed column. The modelling was performed with the use of the Porous Media Model for treating the fl ow inside a porous structure. The standard k- model along with the logarithmic wall functions for the turbulent fl ow range was used. The infl uence of the mesh size on the accuracy of the fl uid fl ow was studied. Both radial and axial direction temperature distributions have been compared with the experimental data 1 and the values calculated from a 2DADPF model. A good agreement between the experimental and the predicted values of the pressure drop, temperature distributions and heat transfer coeffi cient was obtained.

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Flow through Porous Media-the Ergun Equation Revisited

Cited by 912 publications

References 6 publications

The influence of structural parameters on the permeability of ceramic foams

The influence of structural parameters on the permeability of ceramic foams

Previsão da permeabilidade a partir de propriedades físicas de concretos refratários

Modelling of heat transfer in a packed bed column

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