Validating High‐Performance Multi‐GPU MPM for Debris‐Fluid‐Structure Interaction

ABSTRACT The study of debris‐fluid‐structure interaction (DFSI) poses challenges for engineers and animators alike due to its complex nature involving multiple materials, multiple phases, constitutive nonlinearity, and large deformations across varying scales. Current numerical methods frequently overlook critical aspects of DFSI, can be overly complicated to implement, and require excessive computational resources for practical applications. To alleviate this problem, this paper introduces a flexible and explicit Material Point Method (MPM) that achieves a 100‐fold improvement over traditional MPM formulations in terms of CPU‐based computation. The key improvement results from the implementation of computer graphics techniques (MLS‐MPM, APIC, ASFLIP, Simple F‐Bar) and hardware (Multiple Graphics Processing Units). However, while computer graphics prioritizes qualitative realism, engineering needs quantitative accuracy. Therefore, this paper concentrates on a series of DFSI validation benchmarks using an enhanced graphics tool for engineering applications. Carefully chosen examples highlight critical aspects of DFSI. To show stability and favorability for next‐generation scales, we simulate 100,000 to 1,000,000,000 particles within hours for all benchmarks. Accuracy relative to experiments, analytical equations, and alternative numerical models is demonstrated.