A hybrid FEM-DEM approach to the simulation of fluid flow laden with many particles

Casagrande, Marcus Vinicius Sena; Alves, José L. D.; Silva, Carlos E.; Alves, F. T.; Elias, Renato N.; Coutinho, Álvaro L. G. A.

doi:10.1007/s40571-016-0102-y

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…This class of Lagrangian-Eulerian models has been intensively used to understand the variables of interest and describe the gas dynamics in fluidized beds [32,37,68,72]. These studies were limited to the description of flows mixing grains with a single fluid (see [7] for simulations of particleladen flows using the finite element method coupled to the discrete-element method). More recent papers deal with the problem of three-phase flows using techniques to capture the interface between gas and liquid [39,43,50,61].…”

Section: Introductionmentioning

confidence: 99%

Simulation of air invasion in immersed granular beds with an unresolved FEM–DEM model

Constant¹,

Coppin²,

Dubois³

et al. 2020

Comp. Part. Mech.

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This paper is devoted to an unresolved model for the simulation of air invasion in immersed granular flows without interface reconstruction between the liquid and the gas. Experiments of air invading a granular bed immersed in ethanol were achieved in a Hele-Shaw cell to observe the gas invasion paths and to calibrate the numerical multiscale model. The grains movements are computed at a fine scale using the non-smooth contact dynamics method, a time-stepping method considering impenetrable grains. The fluid flow is modelled by equations averaged using the volume fraction of fluid and computed at a coarse scale with the finite element method. A phase indicator function is used to dissociate the gas and the liquid constituting the fluid and to compute the density and viscosity of the fluid at each position. It is moved using a convection equation at each time step. The fluid, solid and phase indicator function computations are validated on simple cases before being used to reproduce experiments of air invasion in immersed granular flows. The experiments are supported by simulations in two dimensions to refine the study and the understanding of the invasion dynamics at short times.

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Section: Introductionmentioning

confidence: 99%

Simulation of air invasion in immersed granular beds with an unresolved FEM–DEM model

Constant¹,

Coppin²,

Dubois³

et al. 2020

Comp. Part. Mech.

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“…Often either a fully or coupled Discrete Element Method (DEM) is used. Thus contributions exhibit Lattice-Bolzmann-DEM approaches [13], Smoothed Particle Hydrodynamic (SPH)-DEM approaches [14,15], Finite-Element-DEM approaches [16][17][18] or Particle-Finite-Element-Method approaches (PFEM) [19] to name only a few. All of these methods have in common, that they are either Eulerian grid-based methods (FEM, LB) which are limited when large deformations are involved or free surface flow is dominant or else are not able to discretize the surrounding fluid without a coupling algorithm (DEM).…”

Section: Introductionmentioning

confidence: 99%

An SPH Approach for Non-Spherical Particles Immersed in Newtonian Fluids

2020

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Solid particles immersed in a fluid can be found in many engineering, environmental or medical fields. Applications are suspensions, sedimentation processes or procedural processes in the production of medication, food or construction materials. While homogenized behavior of these applications is well understood, contributions in the field of pore-scale fully resolved numerical simulations with non-spherical particles are rare. Using Smoothed Particle Hydrodynamics (SPH) as a simulation framework, we therefore present a modeling approach for Direct Numerical Simulations (DNS) of single-phase fluid containing non-spherically formed solid aggregates. Notable and discussed model specifications are the surface-coupled fluid–solid interaction forces as well as the contact forces between solid aggregates. The focus of this contribution is the numerical modeling approach and its implementation in SPH. Since SPH presents a fully resolved approach, the construction of arbitrary shaped particles is conveniently realizable. After validating our model for single non-spherical particles, we therefore investigate the motion of solid bodies in a Newtonian fluid and their interaction with the surrounding fluid and with other solid bodies by analyzing velocity fields of shear flow with respect to hydromechanical and contact forces. Results show a dependency of the motion and interaction of solid particles on their form and orientation. While spherical particles move to the centerline region, ellipsoidal particles move and rotate due to vortex formation in the fluid flow in between.

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“…Often either a fully or coupled Discrete Element Method (DEM) is used. Thus contributions exhibit Lattice-Bolzmann-DEM approaches [8], SPH-DEM approaches [9,10], Finite-Element-DEM approaches [11,12] or Particle-Finite-Element-Method approaches (PFEM) [13] to name only a few. All of these methods have in common, that they are either Eulerian grid-based methods (FEM, LB) which are limited when large deformations are invloved or free surface flow is dominant or else are not able to discretize the surrounding fluid without a coupling algorithm (DEM).…”

Section: Introductionmentioning

confidence: 99%

Modelling of Non-Spherical Particles in Dilute Non-Colloidal Suspensions Using SPH

Kijanski¹,

Krach²,

Steeb³

2020

Preprint

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Suspensions and their applications can be found in many engineering, environmental or medical fields. Considering the special field of dilute suspensions, possible applications are cement paste or procedural processes in the production of medication or food. While the homogenized behavior of these applications is well understood, contributions in the field of pore-scale fully resolved numerical simulations with non-spherical particles are rare. Using Smoothed Particle Hydrodynamics as a simulation framework we therefore present a model for Direct Numerical Simulations of single-phase fluid containing non-spherically formed solid aggregates. Notable and discussed model specifications are the surface-coupled fluid-solid interaction forces as well as the contact forces between solid aggregates. Moreover we simulate and analyze the behavior of dilute non-colloidal suspensions of non-spherical solid particles in Newtonian fluids. The focus of this contribution is the numerical model for suspensions and its implementation in SPH. Therefore shown numerical examples present application examples for a first numerical analysis of influence factors in suspension flow. Results show that direct numerical simulations reproduce known phenomena like shear induced migration very well. Moreover the present investigation exemplifies the influence of concentration and form of particles on the flow processes in greater detail.

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A hybrid FEM-DEM approach to the simulation of fluid flow laden with many particles

Cited by 10 publications

References 27 publications

Simulation of air invasion in immersed granular beds with an unresolved FEM–DEM model

Simulation of air invasion in immersed granular beds with an unresolved FEM–DEM model

An SPH Approach for Non-Spherical Particles Immersed in Newtonian Fluids

Modelling of Non-Spherical Particles in Dilute Non-Colloidal Suspensions Using SPH

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