Dense particulate flow model on unstructured mesh

Wu, Chunliang; Zhan, Jie-Min; Li, Yok Sheung; Lam, Ka Se

doi:10.1016/j.ces.2006.04.033

Cited by 39 publications

(23 citation statements)

References 40 publications

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“…This set of equations has been widely applied in the discrete particle/element studies mentioned in the introduction. The particles' motion obeys Newtonian second law of motion and particle collisions are described by a three-parameter hardsphere model [23,24]. Interactions between the two phases are accounted for through the momentum exchange term.…”

Section: Governing Equations Of the Gas-particle Systemmentioning

confidence: 99%

Three-dimensional discrete particle model for gas–solid fluidized beds on unstructured mesh

Berrouk²,

Nandakumar³

2009

Chemical Engineering Journal

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Section: Governing Equations Of the Gas-particle Systemmentioning

confidence: 99%

Three-dimensional discrete particle model for gas–solid fluidized beds on unstructured mesh

Berrouk²,

Nandakumar³

2009

Chemical Engineering Journal

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“…The gradient of fluid property ∇ϕ cell at each cell is calculated using the divergence theorem [22],…”

Section: Phase Couplingmentioning

confidence: 99%

“…To date, most CFD-DEM studies are concerned with fixed geometries, such as immersed tubes in fluidized systems. Different approaches have been used to treat the stationary boundary of the tube in CFD calculation either using staircase approximation on a Cartesian grid [20,21] or accurately representing the boundary shape using body-fitted unstructured mesh [22,23]. Considerable efforts have been devoted to various aspects of the fluidized bed, including heat transfer [21,24,25], bubble hydrodynamics [20,26] and erosion of the tube surface [27].…”

Section: Introductionmentioning

confidence: 99%

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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“…Particularly popular has been the simulation of fluidized beds (see, for instance, references [1,2,3], this topic was recently reviewed by Deen et al [4]) and two or three phase flows in pipes or reactors (e.g. references [5,6,7,8,9]). …”

Section: Introductionmentioning

confidence: 99%

An extension of the hard-sphere particle–particle collision model to study agglomeration

Kosinski

Hoffmann

2010

Chemical Engineering Science

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Dense particulate flow model on unstructured mesh

Cited by 39 publications

References 40 publications

Three-dimensional discrete particle model for gas–solid fluidized beds on unstructured mesh

Three-dimensional discrete particle model for gas–solid fluidized beds on unstructured mesh

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

An extension of the hard-sphere particle–particle collision model to study agglomeration

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