Open-source MFIX-DEM software for gas-solids flows: Part II — Validation studies

Li, Tingwen; Garg, Rahul; Galvin, Janine E.; Pannala, Sreekanth

doi:10.1016/j.powtec.2011.09.020

Cited by 167 publications

(84 citation statements)

References 50 publications

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“…5 compares the time-averaged porosity profiles with both experiments and CFD-DEM results reported in Muller et al [52] at two heights above the distributor plate: 16.4 and 31.2 mm. In general, the present results are comparable with the experimental data but slightly over-predict the porosity especially in the vicinity of the side walls, similar findings are also reported in other validation tests of CFD-DEM methods [54,55]. At the height of 16.4 mm, the maximum difference between the predicted values and the experimental values is within 20% relative to the experimental value.…”

Section: Cfd Solversupporting

confidence: 92%

Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows

Bayly

Hassanpour

2018

Powder Technology

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Many important engineering applications involve the interaction of free-moving objects with dispersed multiphase flows, however due to the challenge and complexity of modelling these systems, modelling approaches remain very limited and very few studies have been reported. This work presents a new method capable of addressing these problems. It integrates a dynamic meshing approach, used to explicitly capture the flow induced by free-moving large object(s), with a conventional CFD-DEM method to capture the behaviour of small particles in particle-fluid flow. The force and torque acting on the large object due to the fluid flow are explicitly calculated by integrating pressure and viscous stress acting on the object's surface and the forces due to collisions with both the smaller particles and other structures are calculated using a soft-sphere DEM approach. The developed model has been fully implemented on the ANSYS/Fluent platform due to its efficient handling of dynamic meshing and complex and/or free-moving boundaries, thus it can be applied to a wide range of industrial applications. Validation tests have been carried out for two typical gas-solid fluidization cases, they show good qualitative and quantitative agreement with reported experimental literature data. The developed model was then successfully applied to gas fluidization with a large immersed tube which was either fixed or freemoving. The predicted interacting dynamics of the gas, particle and tube were highly complex and highlighted the value of fully resolving the flow around the large object. The results demonstrated that the capability of a conventional CFD-DEM approach could be enhanced to address free-body fluid-structure interaction problems encountered in particle-fluid systems.

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Section: Cfd Solversupporting

confidence: 92%

Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows

Bayly

Hassanpour

2018

Powder Technology

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“…fully coupled TFM-DEM). Details of the governing equations along with the numerical implementation, including the coupling procedure, tests and validations, can be found in Garg et al (2010Garg et al ( , 2012 and Li et al (2012).…”

Section: Numerical Modelmentioning

confidence: 99%

Fully coupled TFM-DEM simulations to study the motion of fuel particles in a fluidized bed

Hernández-Jiménez

García-Gutiérrez

Soria-Verdugo

et al. 2015

Chemical Engineering Science

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“…The voidage near the walls is over-predict at the height of 31.5 mm by current and previous DEM simulations ( [29,71]). Li et al [72] have also simulated this bed and investigated the influence of sphericity and rolling friction on voidage profiles and have obtained similar deviations. Fig.…”

Section: Bubbling Bed Simulationmentioning

confidence: 71%

“…The current study, DEM simulation reported by Müller et al [70], and by Gopalakrishnan and Tafti [29] shows relative deviation from the experimental data, as we can see close to the walls and in the centerline velocity at heights 15 mm and 35 mm above the distributor. Li et al [72] investigated the influence of various simulation parameters, as spring constant, wall friction, sphericity, and rolling friction on vertical solid velocity profiles. These authors also obtained similar deviations in the DEM results.…”

Section: Bubbling Bed Simulationmentioning

confidence: 99%

Determination of the normal spring stiffness coefficient in the linear spring–dashpot contact model of discrete element method

Navarro

Braun

2013

Powder Technology

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Open-source MFIX-DEM software for gas-solids flows: Part II — Validation studies

Cited by 167 publications

References 50 publications

Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows

Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows

Fully coupled TFM-DEM simulations to study the motion of fuel particles in a fluidized bed

Determination of the normal spring stiffness coefficient in the linear spring–dashpot contact model of discrete element method

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