Author(s): M. Leonardi; T. Rung; J. M. Dominguez

Linked Author(s):

Keywords: Smoothed particle hydrodynamics; Variable resolution; Consistent kernel gradients; DualSPHysics

Abstract: The goals of this study are to combine strategies for dealing with errors related to truncated kernels or irregular particle distributions and to reduce the computational cost associated with homogeneous particle resolution, which are typical SPH issues. The starting point of this work are the kernel-based approximations of the Smoothed Particle Hydrodynamics (SPH) method. Two frequently reported issues of SPH are addressed in this study, i.e., errors related to truncated kernels or irregular particle distributions and the aim to reduce the computational cost associated with homogeneous particle resolution. The suggested approach refers to the combination of an explicit correction to approximately achieve first-order consistent kernels and an Eulerian variable resolution approach. The predictive performance is assessed using the DualSPHysics framework. A number of classical validation studies featuring fully wetted and free-surface flow configurations, e.g., lid-driven cavity and a wave maker flow, will be employed to assess the benefits of the combination. The application of the combined approach to more challenging flows and more complex geometries is investigated. Results obtained from the present approach reveal benefits over the baseline SPH approach, as indicated by the exemplary snapshots from simulations of a wave maker case at three different locations.

DOI: https://doi.org/10.3850/978-981-11-2731-1_017-cd

Year: 2018