Abstract
Recently, an algorithm for coupling a Finite Volume
(FV) method, that discretize the Navier-Stokes equations on
block structured Eulerian grids, with the weakly-compressible
SPH was presented. The algorithm takes advantage of the SPH
method to discretize flow regions close to free-surfaces and of
Finite Volume method to resolve the bulk flow and the wall
regions. The continuity between the two solution is guaranteed
by overlapping zones. Here we extend the algorithm in by
adding two new features: 1) creation/deletion of particles at the
boundary of the SPH sub-domain; 2) crossing of the free-surface
on the coupling region. In this context, particle generation is
particularly complex because of the Lagrangian character of
SPH, which has to be consistent with the Eulerian description of
the flow in the Finite Volume method. We propose here a new
technique based on a shifting technique specifically conceived
for the coupling procedure. The creation/deletion technique was
validated on different test cases with particular attention to mass
conservation. On the Finite Volume side, a new technique for free
surface capturing, inspired by the Particle Level-Set algorithms,
was developed and implemented. The combination the two new
features was tested and validated in the case of vortex/free surface
interaction. A final application of the new coupled solver is given
for a violent sloshing flow in a tank.
Anno
2017
Tipo pubblicazione
Altri Autori
L. Chiron, S. Marrone, A. Di Mascio, D. Le Touz
Curatori Volume
Alejandro J. C. Crespo; Moncho Gómez Gesteira; Corrado Altomare
Titolo Volume
SPHERIC 2017. Proceedings of the 12th International SPHERIC Workshop