An immersed boundary method for flows with dense particle suspensions

Azis, Mohd Hazmil Abdol; Evrard, Fabien; Wachem, Berend van

doi:10.1007/s00707-018-2296-y

Cited by 11 publications

(3 citation statements)

References 42 publications

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“…Collisions were modeled using a short ranged repulsive force, based on the work of Glowinski et. al [12,13]. where ⃗ 1,2 = ⃗ 1 − ⃗ 2 , ∆ is the threshold distance for the repulsive force, and = | |.…”

Section: Methodsmentioning

confidence: 99%

Utilization of direct forcing immersed boundary methods for the optimization of inertial focusing microfluidics

Giolando¹,

Ma²,

Kinzer‐Ursem³

et al. 2021

ISPIV21

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Inertial focusing microfluidics have gained significant momentum in the last decade for their ability to separate and filter mixtures of particles and cells based on size [1-3]. However, the most important feature is that the separation is passive, without the need for external forces. At the heart of inertial focusing is the balance between counteracting lift forces: shear and wallinduced lift. Shear-induced lift is a product of the curvature of the fluid flow and the rotation of the particle in the flow, while wall-induced lift is generated by the disturbance of the fluid by the particle near a wall. This phenomenon was first observed by Segre and Silberberg for the focusing of particles in a pipe, and was later extended to the focusing of cells and particle in rectangular channels [4]. Taking advantage of inertial focusing we explore particle capture utilizing an expanded channel microfluidics chip design. By expanding a small region of the straight channel microvortices form in the well, which allows for size selective trapping of particles.

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Section: Methodsmentioning

confidence: 99%

Utilization of direct forcing immersed boundary methods for the optimization of inertial focusing microfluidics

Giolando¹,

Ma²,

Kinzer‐Ursem³

et al. 2021

ISPIV21

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“…In the paper by Abdol Azis et al [2], the authors use an immersed boundary method based on a new Regularised Discrete Momentum Forcing (RDMF) scheme to study the dynamics of dense particle suspensions. To extend the original RDMF scheme to high volume fractions, a modified direct-forcing formulation is proposed, which results in an offset of the imposed no-slip boundary from a moving immersed boundary.…”

Section: Papers Dealing With Solid Particlesmentioning

confidence: 99%

Special issue on finite-size particles, drops and bubbles in fluid flows: advances in modelling and simulations

Marchioli¹,

Vincent²

2019

Acta Mech

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Multiphase flows laden with finite-size particles, droplets and bubbles are of fundamental importance in a huge variety of practical applications embracing environmental phenomena as well as industrial processes [3]. Over the last decade, modelling and simulation of such flows have become feasible thanks to the increase in computational power, and the subject has received growing attention within the multiphase flow community. This is proven by the appearance of dedicated sessions in all major international scientific events dedicated to multiphase flows. Among those organised in the last 5 years, and limiting the list to specialised events, we can cite Euromech colloquia (in particular the Colloquium 555 on Small-scale numerical methods for multiphase flows,

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“…In these methods, the presence of a particle in the flow field is introduced via additional source terms in the equations, also called forcing functions, so that the effect of a ''virtual'' non-slip condition is imposed at the particle's surface location [5]. Due to the flexibility of the IBM, it has been applied to dense gas-solid flows like packed beds [6][7][8][9], fluidized beds [10][11][12] or sediment beds [13]. A simple IBM, especially cheap with respect to computational effort, is the so-called blocked-off (BO) approach.…”

Section: Introductionmentioning

confidence: 99%

Locally Resolved Simulation of Gas Mixing and Combustion Inside Static and Moving Particle Assemblies

et al. 2023

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Resolving the flow field within the voids between particles of reacting granular assemblies is essential to obtain correct conversion rates. Due to the associated computational cost, a high spatial resolution cannot be employed on the device-scale. A combination of a locally resolving and an averaging method is suggested. Namely, the so-called blocked-off method is used to resolve the voids between particles within prescribed regions, while the volume-averaged method is applied in the remaining domain. For a nitrogen jet injected into a regular simple cubic packing of spherical particles passed by a cross-flow of air, the jet dispersion is too low when applying the volume-averaged method for the whole computational domain. The same is also observed in a reacting methane jet flowing into a bed of arbitrarily packed particles with air cross-flow, where the locally resolved approach predicts significantly larger local reaction rates.

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An immersed boundary method for flows with dense particle suspensions

Cited by 11 publications

References 42 publications

Utilization of direct forcing immersed boundary methods for the optimization of inertial focusing microfluidics

Utilization of direct forcing immersed boundary methods for the optimization of inertial focusing microfluidics

Special issue on finite-size particles, drops and bubbles in fluid flows: advances in modelling and simulations

Locally Resolved Simulation of Gas Mixing and Combustion Inside Static and Moving Particle Assemblies

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