EFFICIENT FLUIDIZED GROUND ANALYSIS USING μ(I) RHEOLOGY　WITH IMPLICIT SPH METHOD

Abstract

For simulating the fluidized ground during landslides, a new ISPH using the fully implicit time integration has been developed to decrease total simulation costs for highly viscous fluid simulation in non-Newtonian fluids. With the help of the proposed fully implicit ISPH, μ(I) rheology model, which is one of the reliable non-Newtonian fluids for dense granular materials, can be implemented with lower numerical costs than the semi-implicit ISPH keeping the same accuracy. The fully implicit ISPH method was implemented on a GPU computer to speed up their heavy computations and achieve stable and fast analysis by combining hardware speed-up and software improvement. Finally, comparing numerical and experimental results for sand flow supports the usefulness of the μ(I) rheology model and fully implicit ISPH method for granular flow.