A study of solid wall models for weakly compressible SPH

Valizadeh, Alireza; Monaghan, J. J.

doi:10.1016/j.jcp.2015.07.033

Cited by 48 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). In contrast to the classical ghost particle approach [40] where fluid particle is mirrored on the opposite side of the boundary line, in the proposed model, As already pointed out earlier [29,53,52], a special treatment of ghost particle velocities is needed to enforce no-slip boundaries in a correct way. Following [42], two velocity fields are employed.…”

Section: No-slip and No-penetration Boundary Modelmentioning

confidence: 98%

See 1 more Smart Citation

Comparative study on mesh-based and mesh-less coupled CFD-DEM methods to model particle-laden flow

et al. 2017

View full text Add to dashboard Cite

A comparative study on mesh-based and mesh-less Computational Fluid Dynamics (CFD) approaches coupled with the Discrete Element Method (DEM) is presented. As the mesh-based CFD approach a Finite Volume Method (FVM) is used. A Smoothed Particle Hydrodynamics (SPH) method represents mesh-less CFD. The unresolved fluid model is governed by the locally averaged Navier-Stokes equations. A newly developed model for applying boundary conditions in the SPH is described and validation tests are performed. With the help of the presented comparative tests, the similarities and differences of DEM-FVM and DEM-SPH methods are discussed. Three test cases, comprised of a single solid particle sedimentation test, flow through a porous block and sedimentation of a porous block, are performed using both methods. Drag forces acting on solid particles highly depend on local fluid fractions. For comparative reasons, the size of a cell in FVM is chosen such that fluid fractions match those computed in SPH. In general, DEM-FVM and DEM-SPH methods exhibit good agreement with analytic reference results. Differences between DEM-SPH and DEM-FVM approaches were found mostly due to differences in computed local fluid fractions.

show abstract

Section: No-slip and No-penetration Boundary Modelmentioning

confidence: 98%

“…The importance of accurately enforcing no-slip and no-penetration boundary conditions (BC) was discussed in [29,42,52]. Not only do BC models affect the accuracy of flow fields, but they also contribute to overall numerical stability [42].…”

Section: No-slip and No-penetration Boundary Modelmentioning

confidence: 99%

Comparative study on mesh-based and mesh-less coupled CFD-DEM methods to model particle-laden flow

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This smoothed particle velocity reduces the fluid particle disorder, while does not change the overall linear momentum. An often discussed topic in the SPH literature is the use of boundary conditions [41,42,43]. It is related to the fact, that the description of boundaries in the SPH is not as straightforward as in other grid based CFD methods.…”

Section: Governing Equations Of the Fluid Phasementioning

confidence: 99%

Numerical analysis of wet plastic particle separation using a coupled DEM-SPH method

2018

View full text Add to dashboard Cite

The separation of different kind of plastic particles is required in the process of waste recycling. For the separation drum processes passed through by a liquid are applicable. Thereby the separation is based on the principle that particles either sink or float in a liquid depending on their densities. In this study the aforementioned process is numerically analysed for the separation of polyethylene terephthalate (PET) from polypropylene (PP) particles. The Discrete Element Method coupled with the Smoothed Particle Hydrodynamics method (DEM-SPH) is used for modelling purposes. The employment of the SPH for the modelling of the liquid let us exploit the strong side of this meshless method, namely, the relative easiness to model large movements of the fluid together with free surfaces and moving boundaries. The used theoretical model is presented and validation tests are performed, where a dam-break problem is considered as an example. Simulations of the plastic particle separation in the rotating drum are performed thereafter. The influence of the different operational and design parameters, such as the rotational velocity, the feed rate, the number of lifters etc., on the resultant purity of the plastic is estimated. It is expected that in the future the performed analysis will allow to optimise drum separation processes.

show abstract

“…The aim of this paper is not to discuss these methods in detail, however it should be expressed that the method presented in [60] has been implemented in this paper for fluid-solid interface interaction. This method has been appreciated as a plausible, accurate and stable method by Monaghan, one of the first developer and pioneers of SPH [62].…”

Section: Boundary Conditionsmentioning

confidence: 99%

Numerical simulation and experimental validation of biofilm in a multi-physics framework using an SPH based method

et al. 2016

View full text Add to dashboard Cite

In this paper, a 3D computational model has been developed to investigate biofilms in a multi-physics framework using smoothed particle hydrodynamics (SPH) based on a continuum approach. Biofilm formation is a complex process in the sense that several physical phenomena are coupled and consequently different time-scales are involved. On one hand, biofilm growth is driven by biological reaction and nutrient diffusion and on the other hand, it is influenced by fluid flow causing biofilm deformation and interface erosion in the context of fluid and deformable solid interaction. The geometrical and numerical complexity arising from these phenomena poses serious complications and challenges in grid-based techniques such as finite element.Here the solution is based on SPH as one of the powerful meshless methods. SPH based computational modeling is quite new in the biological community and the method is uniquely robust in capturing the interface-related processes of biofilm formation such as erosion. The obtained results show a good agreement with experimental and published data which demonstrates that the model is capable of simulating and predicting overall spatial and temporal evolution of biofilm.

show abstract

A study of solid wall models for weakly compressible SPH

Cited by 48 publications

References 26 publications

Comparative study on mesh-based and mesh-less coupled CFD-DEM methods to model particle-laden flow

Comparative study on mesh-based and mesh-less coupled CFD-DEM methods to model particle-laden flow

Numerical analysis of wet plastic particle separation using a coupled DEM-SPH method

Numerical simulation and experimental validation of biofilm in a multi-physics framework using an SPH based method

Contact Info

Product

Resources

About