On the settling behaviour of polydisperse particle clouds in viscous fluids

Bülow, Fabian; Nirschl, Hermann; Dörfler, Willy

doi:10.1016/j.euromechflu.2014.11.003

Cited by 12 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Real settling velocities observed may differ from this idealized treatment due to effects of particle-particle interactions that can arise as a result of manifold reasons, like particle surface properties [29], shape and concentration-dependent effective viscosity [30,31] that lead to acceleration or hindrance (hindered settling) of the particles [24]. Generally, those real settling velocities are measurable and subject to research up until now [30,32,33]. Concluding a functional correlation of experimental findings allows to simply calculate the real settling velocity u real (x, c) approximately by applying the following expression:…”

Section: Tubular Centrifuges and Fractionation By Sedimentation Behaviormentioning

confidence: 99%

Investigation of Centrifugal Fractionation with Time-Dependent Process Parameters as a New Approach Contributing to the Direct Recycling of Lithium-Ion Battery Components

Sinn

Flegler

Wolf

et al. 2020

Metals

View full text Add to dashboard Cite

Recycling of lithium-ion batteries will become imperative in the future, but comprehensive and sustainable processes for this are still rather lacking. Direct recycling comprising separation of the black mass components as a key step is regarded as the most seminal approach. This paper contributes a novel approach for such separation, that is fractionation in a tubular centrifuge. An aqueous dispersion of cathode materials (lithium iron phosphate, also referred to as LFP, and carbon black) serves as exemplary feed to be fractionated, desirably resulting in a sediment of pure LFP. This paper provides a detailed study of the commonly time-dependent output of the tubular centrifuge and introduces an approach aiming to achieve constant output. Therefore, three different settings are assessed, constantly low, constantly high and an increase in rotational speed over time. Constant settings result in the predictable unsatisfactory time-variant output, whereas rotational speed increase proves to be able to maintain constant centrate properties. With further process development, the concept of fractionation in tubular centrifuges may mature into a promising separation technique for black mass in a direct recycling process chain.

show abstract

Section: Tubular Centrifuges and Fractionation By Sedimentation Behaviormentioning

confidence: 99%

Investigation of Centrifugal Fractionation with Time-Dependent Process Parameters as a New Approach Contributing to the Direct Recycling of Lithium-Ion Battery Components

Sinn

Flegler

Wolf

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…It is also important to note that the leakage of small grains is dependant on the initial conguration of the polydisperse cloud. A greater number of grains are lost during the fall in unmixed clouds than in mixed clouds [13].…”

Section: Introductionmentioning

confidence: 97%

Implementation of an unresolved stabilised FEM–DEM model to solve immersed granular flows

Constant

Dubois²,

Lambrechts

et al. 2018

Comp. Part. Mech.

View full text Add to dashboard Cite

This paper presents an unresolved Computational Fluid Dynamic-Discrete Element Method (CFD-DEM) model for the simulation of ows mixing uid and grains. The grains trajectories are solved at a ne scale using a discrete element method. It provides the velocities and the trajectories of the grains with an accuracy that is needed to describe microscopic phenomena like clogging in pipe happening in these ows. Solved at a coarse scale using the nite element method, the uid motion is deduced from a mean continuous representation of the uid phase giving computational performance and keeping variables evolutions that are of interest for a lot of simulation processes. The key point of this method lays in the coupling of the two dierent representation scales. An empirical drag formula for monodisperse granular media parametrises the transfer of momentum between the phases. Applying this model to the well-known problem of suspension drops provides validation and insight in this kind of methodology. Simulations in which This research has been funded by the F.R.S.-FNRS through a FRIA grant.

show abstract

“…When interparticle forces are no longer negligible, hindered settling starts to occur. 16 Hindered settling is the settling of suspended particles that are influenced by adjacent particle forces. 14 The gradual increase of pressure from adjacent particles over time cause consolidation settling to occur.…”

Section: Introductionmentioning

confidence: 99%

The evaluation of aluminum and iron metal oxide settling behaviors for Hanford insoluble solids waste preprocessing

Williams

Peterson

Burns

et al. 2023

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The Hanford site is currently one of the largest and most expensive cleanup sites for hazardous, radioactive waste. Over 20% of the waste found at the Hanford site is in the form of a high activity sludge. The insoluble solids in the sludge will need to be concentrated prior to vitrification in the high‐level waste (HLW) melter. This will minimize the amount of liquid that will be evaporated during the melting process and expedite the melter processing rate. One proposed option for concentrating the insoluble solids is gravity settling in the storage tanks. Metal oxide compounds containing aluminum and iron make up the majority of the insoluble solids in the sludge, therefore understanding the behavior of these compounds in various tank waste matrices can facilitate sludge pretreatment options. A study of non‐radioactive slurry solutions containing Al(OH)3 (gibbsite), AlO(OH) (boehmite), and Fe2O3 (iron (III) oxide) was conducted to determine the time dependent interface behavior and settling rates of these compounds. Variations in solids loading and sodium concentration were evaluated to represent waste processing conditions and the results of these settling studies were compared with prior tank waste settling tests. Information gathered from these studies can be used to inform future decisions on sludge treatment processes of the insoluble solids processed at the Hanford site.

show abstract

On the settling behaviour of polydisperse particle clouds in viscous fluids

Cited by 12 publications

References 23 publications

Investigation of Centrifugal Fractionation with Time-Dependent Process Parameters as a New Approach Contributing to the Direct Recycling of Lithium-Ion Battery Components

Investigation of Centrifugal Fractionation with Time-Dependent Process Parameters as a New Approach Contributing to the Direct Recycling of Lithium-Ion Battery Components

Implementation of an unresolved stabilised FEM–DEM model to solve immersed granular flows

The evaluation of aluminum and iron metal oxide settling behaviors for Hanford insoluble solids waste preprocessing

Contact Info

Product

Resources

About