Pressure drop in packed beds of angular parallelepipeds, including the effects of particle interference

Trudel, Élizabeth; Hallett, William L.H.

doi:10.1016/j.ces.2017.01.004

Cited by 13 publications

(1 citation statement)

References 24 publications

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“…Third, Kozeny-Carman prediction could be further refine taking surface overlapping into account, which would lower the yielded permeability value. Yet, this process heavily relies on empirical, case dependent, studies [42,43].…”

Section: Resultsmentioning

confidence: 99%

Hydrodynamics of a packed bed of non-spherical polydisperse particles: A fully virtual approach validated by experiments

Pozzobon

Colin

Perré

2018

Chemical Engineering Journal

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This work presents a numerical workflow to generate a virtual packed bed made of non-spherical polydisperse particles, and subsequently predict its permeability. Wood chips were taken as an illustration. First, chips are sized before being recreated numerically. Then, using LMGC90, a DEM code, a packed bed made of those chips was generated. Once bed internal had been sampled, CFD tools belonging to the OpenFOAM library were used to mesh the geometry (snappyHexMesh) and compute fluid motion (simpleFoam). Finally, using numerical results, the bed permeability was computed in both Stokes and inertial regimes-turbulence being described by Launder-Reece-Rodi model. In parallel, experimental measurements of the permeability of a packed bed, made of the exact same wood chips, was carried out. These experiments were used as a reference to challenge numerical results. The permeability value delivered by the workflow is 16.0 % higher than the experimental value. This value has to be compared with Kozeny-Carman equation estimation which overestimates bed permeability by 115 %. Going one step further, this framework was successfully used to compute inertial effects constant of the Forshheimer equation for our packed bed. Throughout this article, a special care has been taken in explaining and evaluating the impact of all the key parameters, namely, number of particles that have to be sized, mesh refinement level, numerical domain dimensions. This workflow opens the door to numerical estimation of bed tortuosity, dispersion coefficients, volumetric heat exchange coefficients, and much more, using the particle size distribution as unique input data.

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Section: Resultsmentioning

confidence: 99%

Hydrodynamics of a packed bed of non-spherical polydisperse particles: A fully virtual approach validated by experiments

Pozzobon

Colin

Perré

2018

Chemical Engineering Journal

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Pressure loss in packed beds of multicomponent mixtures of flat particles with particle overlap, including random chips

Schonfeldt,

Hallett

2024

Can J Chem Eng

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AbstractwPressure loss measurements are presented for packed beds of multi‐component mixtures of thin angular parallelepipeds and of random wood chips for a Reynolds number range of 50 to 500. For flat particles like these, the degree to which the particles overlap is an essential factor in pressure loss, and this was measured using two different methods, including a novel technique involving progressive dismantling and photography of the bed. The experimental friction factors were found to be well represented by the Nemec and Levec pressure loss correlation, an Ergun‐type equation with an explicit dependence of the parameters on particle sphericity, with the equation expanded to include the effects of particle overlap and of packing anomalies at the wall. The friction losses of the mixtures were found to be somewhat higher than those of the individual component particles, requiring a minor change in the correlation parameters. Estimates of the tortuosity of the bed channels showed that the greater losses of the mixtures correspond to an increase in tortuosity.

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Experimental investigation of a packed-bed thermal energy storage system fitted with perforated cylindrical elements

et al. 2019

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Pressure drop in packed beds of angular parallelepipeds, including the effects of particle interference

Cited by 13 publications

References 24 publications

Hydrodynamics of a packed bed of non-spherical polydisperse particles: A fully virtual approach validated by experiments

Hydrodynamics of a packed bed of non-spherical polydisperse particles: A fully virtual approach validated by experiments

Pressure loss in packed beds of multicomponent mixtures of flat particles with particle overlap, including random chips

Experimental investigation of a packed-bed thermal energy storage system fitted with perforated cylindrical elements

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