Structural characteristics of packed beds of low aspect ratio

Govindarao, V. M. H.; Ramrao, Kandiraju V.S.; Rao, Ammavajjala V.S.

doi:10.1016/0009-2509(92)80330-f

Cited by 29 publications

(14 citation statements)

References 13 publications

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“…For slender fixed beds, for which the ratio between reactor diameter and particle diameter D/d p reaches values of smaller 10, the confining wall influences the bed structure, which leads to zones of high and low void fraction in the radial direction [5,6]. Various correlations for the void fraction prediction can be found in the literature [7][8][9][10][11]. All of which are based on different data sets and thus lead to different values, especially for D/d p < 10.…”

Section: Introductionmentioning

confidence: 99%

Local Structure Effects on Pressure Drop in Slender Fixed Beds of Spheres

Flaischlen

Kutscherauer

Wehinger

2020

Chemie Ingenieur Technik

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Ing. Matthias Kraume on the occasion of his 65th birthday For slender fixed beds, the void fraction and flow properties are complex topics. Different factors can influence the local bed structure. For statistical analysis, 2800 fixed beds have been generated and the impact of friction factor and reactor-toparticle diameter ratio on the distribution has been shown. With particle-resolved computational fluid dynamics, all local structure effects are taken into account for the flow simulations. Pressure drop measurements and simulations showed that these effects can lead to areas with low flow resistance, leading to overestimated pressure drop by typical correlations up to 85 %.

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Section: Introductionmentioning

confidence: 99%

Local Structure Effects on Pressure Drop in Slender Fixed Beds of Spheres

Flaischlen

Kutscherauer

Wehinger

2020

Chemie Ingenieur Technik

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“…As expected, the corresponding radial porosity profile displayed in Fig. is in excellent agreement with the analytical solution presented by Govindarao et al . Results for the radial porosity of the two packed beds with larger D / d shown in the same figure are well in line with experimental results from Goodling et al .…”

Section: Resultsmentioning

confidence: 99%

Scripting as an Approach to Automated CFD Simulation for Packed Bed Catalytic Reactor Modeling

Fernengel

Habla

Hinrichsen

2018

Chemie Ingenieur Technik

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In recent years computational fluid dynamics (CFD) has become a widely applied tool for the simulation of catalytic fixed‐bed reactors and numerous authors have contributed towards methods for random packed bed generation and flow simulation. The presented approach focuses on an automated simulation routine realized through bash and python scripting covering multiple entire simulation runs including preprocessing, simulation as well as post‐processing based on open‐source software. As an example, the routine is demonstrated with a case study on catalytic fixed‐bed reactors.

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“…This is a similar packing that has been shown to occur for packed beds of low aspect Ž . ratios Govindarao et al, 1992 . The Bennett model is applied for diameter aspect ratios of 3.7-D rdF 4 where both e wall and inner spheres are used.…”

Section: Void Fraction Developmentmentioning

confidence: 98%

Narrow annular packed‐bed radial void fraction correlation

Mueller

2002

AIChE Journal

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Structural characteristics of packed beds of low aspect ratio

Cited by 29 publications

References 13 publications

Local Structure Effects on Pressure Drop in Slender Fixed Beds of Spheres

Local Structure Effects on Pressure Drop in Slender Fixed Beds of Spheres

Scripting as an Approach to Automated CFD Simulation for Packed Bed Catalytic Reactor Modeling

Narrow annular packed‐bed radial void fraction correlation

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