RT Journal Article
T1 A positioning algorithm for SPH ghost particles in smoothly curved geometries
A1 Vela Vela, Luis Ernesto
A1 Reynolds Barredo, José Miguel
A1 Sánchez Fernández, Luis Raúl
AB An algorithm to place ghost particles across the domain boundary in the context ofSmoothed Particle Hydrodynamics (SPH) is derived from basic principles, and constructedfor several simple, three-dimensional, geometries. The performance of the algorithm iscompared against the more commonly used ‘‘mirrored with respect to the local tangentplane" approach and shown to converge to it whenever the distance of the particles to thereflecting boundary is much smaller than a local measure of the surface’s curvature. Thealgorithm is demonstrated, tested and compared against the usual approach via simulations of a compressible flow around a cylinder, and the numerical cost of implementing itis addressed. We conclude that use of ghost particles to enforce boundary conditions is notonly viable in the presence of smoothly curved boundaries, but more robust than the usualmethod for low-resolution scenarios.
PB ELSEVIER BV
SN 0377-0427
YR 2019
FD 2019-06
LK https://hdl.handle.net/10016/35733
UL https://hdl.handle.net/10016/35733
LA eng
NO This research was sponsored in part by the DGICYT (Dirección General de Investigaciones Científicas y Tecnológicas)of Spain under National Project No. ENE2015-68265. Research was also funded in part by the Erasmus Mundus Program:International Doctoral College in Fusion Science and Engineering FUSION-DC, Spain.
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RD 1 may. 2024