SPH consistency and different expression of SPH operators (gradient and Laplacian) accuracy are numerically investigated with regards to particle disorder and smoothing length on different particle distributions (2D and 3D Cartesian and 2D triangular). It is observed that particle disorder deteriorates SPH consistency and adds to the operators a diverging dependency on the smoothing length. Numerical tests evaluate the accuracy of the different operators on perturbed lattices, allowing to establish a rank in terms of robustness against particle disorder.
Influence of particle disorder and smoothing length on SPH operator accuracy
10th International SPHERIC Workshop
16.06.2015 - 18.06.2015