Simulation of dense granular flows: Comparison with experiments

Artoni, Riccardo; Zugliano, A.; Primavera, Alessandra; Canu, Paolo; Santomaso, Andrea C.

doi:10.1016/j.ces.2010.11.029

Cited by 18 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8]). However, a scientific bottleneck still prevents the use of those theories in real configurations: the modeling of the interaction of the granular material with a solid boundary and its implication on the rheology of the system [9,10]. Yet, such interactions are crucial to understand shear banding that is a widespread phenomenon in slow granular flows.…”

mentioning

confidence: 99%

Effective Wall Friction in Wall-Bounded 3D Dense Granular Flows

Artoni¹,

Richard²

2015

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

We report numerical simulations on granular shear flows confined between two flat but frictional sidewalls. Novel regimes differing by their strain localization features are observed. They originate from the competition between dissipation at the sidewalls and dissipation in the bulk of the flow. The effective friction at sidewalls is characterized (effective friction coefficient and orientation of the friction force) for each regime, and its interdependence with slip and force fluctuations is pointed out. We propose a simple scaling law linking the slip velocity to the granular temperature in the main flow direction which leads naturally to another scaling law for the effective friction.

show abstract

mentioning

confidence: 99%

Effective Wall Friction in Wall-Bounded 3D Dense Granular Flows

Artoni¹,

Richard²

2015

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A numerical model was built to simulate the experimental study conducted on the metal silo, in order to study the distribution of the resulting pressure on the silo wall with and without the use of the insert. This study is based on a previous study conducted by Wojcik [15] and Wang [9][10][11][12][13][14][15][16][17][18], in which the flow was modeled only within the hopper using the FEM. The shape and dimensions of the silo and the insert used in the model were similar to those in the authors' previous experimental study.…”

Section: Finite Element Model Setup and Model Parametersmentioning

confidence: 99%

Numerical Modeling of Wall Pressure in Silo with and Without Insert

Askif

Hammadeh

Ubysz

et al. 2020

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

This paper presents a methodology based on the finite element method to simulate the flow of granular materials. Moreover, it allows proper estimation of dynamic pressure during silo discharge since this subject is still under discussion, especially for designing silos with an insert (an input element). A 2-D simulation of the discharge process of a cylindrical silo with cone and a central discharging orifice was performed. Two cases were studied, with and without using insert in silo. Numerical analysis was carried out with the help of the uncoupled arbitrary Lagrangian–Eulerian (ALE) approach. The resulting dynamic pressure distribution on the silo wall for each of the two cases was inferred numerically. The resulting values of pressure were compared with the results of the experimental study on a cylindrical metal silo to demonstrate the accuracy of the numerical model in determining the dynamic wall pressure, especially in the case of using an insert in silo during discharge.

show abstract

“…[ 33 ] Tracers may also be coloured, radioisotope, or magnetic particles. [ 7,34–36 ] In recent years, near‐infrared spectroscopy (NIRS) has proven to be one of the principal analytical techniques used in the pharmaceutical industry due to it being safe, rapid, non‐destructive, and inexpensive. [ 30,37,38 ] Notably, Benedetti proposed a new in‐line methodology based on NIRS instead of inserting an invasive thief probe to avoid local segregation.…”

Section: Introductionmentioning

confidence: 99%

Gravity mass powder flow through conical hoppers ‐ Part I: A mathematical model predicting the radial velocity profiles of free‐flowing granular systems as a function of cohesion and adhesion properties

et al. 2021

View full text Add to dashboard Cite

It has been demonstrated that the concentration, velocity profiles, and residence time distribution (RTD) of a binary powder mixture flowing under gravity‐driven conditions can be evaluated via near‐infrared spectroscopy (NIRS). Contrary to a classical fluid flow profile, a granular flow profile was proven to be a function of cohesion and adhesion powder mixture properties. The present work aimed to develop a semi‐empirical equation inspired by the radial flow profile equation used for classical fluids. It achieves this by introducing the effect of powder friction properties as internal (particle‐particle) and external (particle‐hopper wall) friction angles. The developed equation shows good agreement with the experimental results using various hopper angles and two types of free‐flowing granular systems. The knowledge gained from the developed equation is intended to predict flow behaviour in conical hoppers as a function of flowing powder adhesion and cohesion parameters. Combining such knowledge with residence time distribution and the radial concentration profiles would make it possible to evaluate the expected extent of segregation, which could lead to prohibitive deviations in the production of pharmaceutical solid dosage forms.

show abstract

Simulation of dense granular flows: Comparison with experiments

Cited by 18 publications

References 28 publications

Effective Wall Friction in Wall-Bounded 3D Dense Granular Flows

Effective Wall Friction in Wall-Bounded 3D Dense Granular Flows

Numerical Modeling of Wall Pressure in Silo with and Without Insert

Gravity mass powder flow through conical hoppers ‐ Part I: A mathematical model predicting the radial velocity profiles of free‐flowing granular systems as a function of cohesion and adhesion properties

Contact Info

Product

Resources

About