Dynamic flow-based particle splitting in smoothed particle hydrodynamics

Summary In this work, a dynamic procedure for local particle refinement to be used in smoothed particle hydrodynamics (SPH) is presented. The algorithm is able to consistently produce successive levels of particle splitting in accordance to a flow‐based criterion. It has been applied together with a...

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Bibliographic Details
Published in:International journal for numerical methods in engineering 2016-05, Vol.106 (5), p.397-410
Main Authors: Khorasanizade, Sh, Sousa, J. M. M.
Format: Article
Language:English
Subjects:
adaptivity
Algorithms
Computational fluid dynamics
dynamic refinement
Dynamics
Fluid flow
Hydrodynamics
incompressible SPH
Mathematical models
meshless method
Obstacles
Splitting
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Summary:Summary In this work, a dynamic procedure for local particle refinement to be used in smoothed particle hydrodynamics (SPH) is presented. The algorithm is able to consistently produce successive levels of particle splitting in accordance to a flow‐based criterion. It has been applied together with accurate and robust formulations for variable spatial resolution in the framework of a semi‐implicit, truly incompressible scheme for SPH. Different test cases have been considered to assess the capabilities and advantages of the proposed procedure, namely, the laminar flow around circular and square obstacles in a plane channel for various regimes. Such flow cases entail the simulation of attached and separated shear layers, recirculating flow, vortex shedding and surface discontinuities. The results obtained for two levels of particle splitting have demonstrated that significant improvements may be obtained with respect to uniform particle spacing solutions in a variety of situations, thus presenting an excellent trade‐off between accuracy and computational cost. Copyright © 2015 John Wiley & Sons, Ltd.
ISSN:0029-5981
1097-0207
DOI:10.1002/nme.5128