From highly specialised to generally available modelling of shear induced particle migration for flow segregation based separation technology

Drijer, I.; Laar, Ties van de; Vollebregt, H.M.; Schroën, C.G.P.H.

doi:10.1016/j.seppur.2017.10.001

Cited by 10 publications

(11 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous study [10], it was shown that different diffusion coefficients can have a large influence on the development length of the SID profile, but not on the fully developed SID profile. It is expected that the friction factor that is used for both the drag force and the SID force has similar effects; therefore, this was tested first.…”

Section: Friction Factormentioning

confidence: 93%

“…To distinguish the different particle migration mechanisms, the dimensionless particle Reynolds number and Péclet number are used, which are indicative of the ratios between the different forces that are acting on the particles [10]. SID is dominant for particles in the range of 1 to 10 µm, with a particle Reynolds number lower than one and a Péclet number that is higher than one (Figure 1).…”

Section: Shear Induced Diffusion Based Segregationmentioning

confidence: 99%

“…In order to facilitate process design, we have set up and validated a CFD model, which describes the effect of SID in a non-porous channel only, for a monodisperse suspension in earlier work [10]. In the current study, this CFD model will be used as a starting point for the description of the whole process that also consists of a porous section (Figure 3).…”

Section: Shear Induced Diffusion Based Segregationmentioning

confidence: 99%

“…The interested reader is referred to a previous study [10] for the details of the CFD model that describes the SID process and its validation; here, we limit ourselves to a summary, and highlight the additions made to the previously established model. The 'Multiphase Segregated Flow Model' of the commercial CFD software STAR-CCM+ (CD-adapco, London, UK) is applied, which uses an Euler-Euler type of formulation that enables us to do the fast calculations that are needed for parameter studies.…”

Section: Model Developmentmentioning

confidence: 99%

See 3 more Smart Citations

Modelling Shear Induced Diffusion Based Particle Segregation: A Basis for Novel Separation Technology

Drijer

Schroën

2018

Applied Sciences

View full text Add to dashboard Cite

Shear induced diffusion (SID) based flow segregation is a technique that can be used for concentration and fractionation purposes, and it has the potential to become an economical and sustainable alternative for e.g., membrane separation. When compared to conventional microfiltration, problems related to fouling and cleaning are expected to be minimal. To make the best use of the opportunities that this technique holds, detailed insights in flow and particle behavior are needed. Modelling this process allows for us to chart particle segregation in flow, as well as the effect of suspension removal through a pore and the restoration of the flow profile after the pore. As a starting point, we take the computation fluid dynamics (CFD) model that is presented in a previous study. A difference in channel height to particle diameter ratio influences the entrance length of the SID profile as well as its fully developed profile. When extracting liquid through one pore, particles are systematically transmitted at a lower concentration (59-78%) than is present in the bulk. The recovery lengths of the SID profile after the pore were short, and thus pores can be placed at realistic distances, which forms a good foundation for further design of this novel separation technology that will ultimately be applied for fractionation of particles taking relatively small differences in diffusive behavior as a starting point.

show abstract

Section: Friction Factormentioning

confidence: 93%

Section: Shear Induced Diffusion Based Segregationmentioning

confidence: 99%

Section: Shear Induced Diffusion Based Segregationmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Modelling Shear Induced Diffusion Based Particle Segregation: A Basis for Novel Separation Technology

Drijer

Schroën

2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Another interesting work based on the two-fluid modeling approach is that of Drijer et al [39]. Here particle migration is modeled through a force fulfilling the action and reaction principle (a force present in the dynamical equations of both phases with opposite signs).…”

Section: -4mentioning

confidence: 99%

Roles of solid effective stress and fluid-particle interaction force in modeling shear-induced particle migration in non-Brownian suspensions

et al. 2021

View full text Add to dashboard Cite

The mixture, or suspension balance, model is the most frequently used to describe shear-induced particle migration in Newtonian fluids. The model suggests that neutrally buoyant particles migrate only if the effective stress tensor of the solid phase is nonuniform. In moderately dense suspensions, where direct particle contacts and interparticle forces are negligible, this tensor originates from the velocity fluctuations of the particles. Using Buyevich's constitutive equation, we show that the time required by these fluctuations to induce significant particle migration exceeds considerably the timescale of the process, obtained experimentally. In particular, the ratio between these two timescales is proportional to the reciprocal of the Reynolds number; hence, for vanishingly small values of the Reynolds number (the case on which this work focuses), particle velocity fluctuations cannot be responsible for particle migration. We conclude that, if direct particle contacts and interparticle forces are absent, particle migration must have another driver. In the literature, it has been suggested that this is the lubrication forces between the particles. On this assumption, Morris and Boulay advanced a closure for the solid effective stress tensor. This closure seems to predict well the migration process, but as discussed by P. R. Nott, E. Guazzelli, and O. Pouliquen, The suspension balance model revisited, Phys. Fluids 23, 043304 (2011), it presents some conceptual issues. We investigate this matter and show that lubrication forces can induce particle migration, and the tensor quantifying their effect can be closed by Morris and Boulay's equation; however, this tensor is not part of the effective stress tensor of the solid phase.

show abstract

Rethinking Membrane Processes for Food: From Particle Behavior to Innovative Membrane Cascades

Schroën,

Bouhid de Aguiar

2023

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Within the food industry, membrane separation is commonplace due to its relatively low energy consumption. It allows fractionation of various feeds (e.g., milk) into starting materials for food design. We feel that considerable progress can still be made. For this, the specific properties of the components of interest would need to be taken into account, such as their mobility in flow, and their deformability in relation to the actual membrane structure. Furthermore, improvements are possible through cascaded use of membrane processes, and upgrading waste streams, which leads to new opportunities.

show abstract

From highly specialised to generally available modelling of shear induced particle migration for flow segregation based separation technology

Cited by 10 publications

References 29 publications

Modelling Shear Induced Diffusion Based Particle Segregation: A Basis for Novel Separation Technology

Modelling Shear Induced Diffusion Based Particle Segregation: A Basis for Novel Separation Technology

Roles of solid effective stress and fluid-particle interaction force in modeling shear-induced particle migration in non-Brownian suspensions

Rethinking Membrane Processes for Food: From Particle Behavior to Innovative Membrane Cascades

Contact Info

Product

Resources

About