Pressure Drop in Vertical Solid-Gas Suspension Flow

Khan, Javaid Iqbal; Pei, David C. T.

doi:10.1021/i260048a007

Cited by 13 publications

(7 citation statements)

References 7 publications

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“…These correlations only valid in the dilute-phase region and at certain flow range [1]. In this matter, only Khan and …”

Section: Fundamentalmentioning

confidence: 97%

“…The linear solid particle velocity is also constant at any segment. Table 2 Pressure drop correlations developed by other authors for dilute phase [1].…”

Section: Pressure Drop Correlation Developmentmentioning

confidence: 99%

“…Most existing models, such as reviewed [1] are suited only to pure dilute-phase or dense-phase applications. However, the possible modes of flow over long distances could occur between these two extremes such as dune-flow, sliding beds, and irregular slugging.…”

Section: Introductionsmentioning

confidence: 99%

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Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Bindar¹,

Sutrisniningrum²,

Santiani³

2009

itbj.eng.sci.

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Abstract. More general correlations between pressure drop and gas-solid flow variables are developed from the present experimental data. The correlation was modeled for a pneumatic conveying system in a vertical pipe. The transition boundary between dense and dilute regimes is constructed from the pressure drop correlations. The gas-solid particle flow variables are quantified by the gas Reynolds (N ref ) and the solid Froude (F rp ) numbers. The dense flow regime is indicated by the decrease of the pressure drop with the increase of the gas Reynolds number. In contrary, the dilute regime exhibits the increase of the pressure drop with the gas Reynolds number. The proposed correlations were built at the range of gas Reynolds number f from 360 to 500 and solid Froude number from 0,01 to 0,02.

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“…These correlations only valid in the dilute-phase region and at certain flow range [1]. In this matter, only Khan and …”

Section: Fundamentalmentioning

confidence: 97%

“…The linear solid particle velocity is also constant at any segment. Table 2 Pressure drop correlations developed by other authors for dilute phase [1].…”

Section: Pressure Drop Correlation Developmentmentioning

confidence: 99%

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Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Bindar¹,

Sutrisniningrum²,

Santiani³

2009

itbj.eng.sci.

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“…They modified the Gill and Sher (1961) eddy viscosity equation for single-phase flow through a tube by redefining the Von Karman constant as a function of the solids-loading ratio. Rose and Duckworth (1969) developed general, but complicated, graphical correlations for the prediction of pressure drop by applying dimensional analysis to the individual pressure-drop components of the equation Apt = APag + APap + APfg + APfp + APpg + APpp (4) Khan and Pei (1973) conducted a comparative study of the existing correlations for the pressure drop in dilute-phase vertical transport and presented a correlating equation of the ratio of the friction pressure drop for the suspension to that for gas alone.…”

Section: Literature Reviewmentioning

confidence: 99%

Pressure drop for cocurrent downflow of gas‐solids suspensions

Kim

Seader

1983

AIChE Journal

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13-mm insidediameter tube was investigated using 329-micron spherical glass beads in air. The gas Reynolds number varied from 0 to 30,oOO with solids-loading ratios of up to 20 at a gas Reynolds number of l0,oOO. The frictional pressure drop for downflow was found to be a weaker function of the solids-loading ratio than the upflow case using data reported in the literature. Empirical correlation of the t w q h a s e friction factor, in terms of the gas Reynolds number and a dimensionless parameter, C D E~D / [ (~ -E')dp], showed that at high solids loadings, particles tend to stabilize the suspension flow. The dimensionless parameter seems to be applicable to a universal pressure drop correlation for solids-fluid systems, but requires further investigation. University of Utah Depl. of Chemical Engineering Salt Lake City, UT 84112 the literature are in conflict. Several pressure-drop correlations proposed for vertical-upflow systems cover a very limited range of variables, and they cannot be safely extrapolated outside the range of the experimental data.

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“…Dilute Phase Flow Regime. Numerous correlations are available in the literature for predicting pressure drop in dilute phase vertical pneumatic conveying as pointed out in recent reviews (Richards and Wierma, 1972;Khan and Pei, 1973;Capes and Nakamura, 1973). The published correlations can be classified into three categories: (a) Pressure drop is considered in terms of three components: acceleration, gravity, and wall friction.…”

Section: Pressure Drop Predictionmentioning

confidence: 99%

A Quantitative Design Procedure for Vertical Pneumatic Conveying Systems

Leung¹,

Wiles²

1976

Ind. Eng. Chem. Proc. Des. Dev.

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In vertical pneumatic conveying, the task of the design engineer Is, for a given rate of conveying a particular solid, to specify pipe size, air flow rate, pressure drop, and flow pattern In the riser. In this paper a quantitative procedure for tackling this design problem Is outlined. The procedure Is an updated version of an earlier procedure presented by Leung et al. (1971a) and is based on recent advances on prediction of flow regime and pressure drop in vertical pneumatic conveying.

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Pressure Drop in Vertical Solid-Gas Suspension Flow

Cited by 13 publications

References 7 publications

Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Pressure drop for cocurrent downflow of gas‐solids suspensions

A Quantitative Design Procedure for Vertical Pneumatic Conveying Systems

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