A hybrid Lagrangian Voronoi–SPH scheme
A hybrid Lagrangian Voronoi–SPH scheme, with an explicit weakly compressible formulation for both the Voronoi and SPH sub-domains, has been developed. The SPH discretization is substituted by Voronoi elements close to solid boundaries, where SPH consistency and boundary conditions implementation become problematic. A buffer zone to couple the dynamics of both sub-domains is used. This zone is formed by a set of particles where fields are interpolated taking into account SPH particles and Voronoi elements. A particle may move in or out of the buffer zone depending on its proximity to a solid boundary. The accuracy of the coupled scheme is discussed by means of a set of well-known verification benchmarks.
KeywordsCFD SPH Voronoi Coupling
The authors thank Francisco J. Dominguez for assistance with the artwork. Antonio Souto-Iglesias acknowledges the support of Universidad Politécnica de Madrid for funding his leave in UC Berkeley Department of Mechanical Engineering from September 2016 until June 2017.
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Conflicts of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
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