Fast and versatile fluid-solid coupling for turbulent flow simulation

The intricate motions and complex vortical structures generated by the interaction between fluids solids are visually fascinating. However, reproducing such a two-way coupling thin objects turbulent numerically is notoriously challenging computationally costly: existing approaches as cut-cell or immersed-boundary methods have difficulty achieving physical accuracy, even visual plausibility, of simulations involving fast-evolving flows with immersed arbitrary shapes. In this paper, we propose an efficient versatile approach for simulating fluid-solid within kinetic (lattice-Boltzmann) fluid simulation framework, valid both laminar highly flows, thick objects. We introduce novel hybrid to which systematically involves mesoscopic double-sided bounce-back scheme followed velocity correction more robust plausible treatment near moving (thin) solids, preventing flow penetration reducing boundary artifacts significantly. Coupled approximation simplify geometric computations, whole method preserves inherent massively parallel computational nature method. Moreover, simple GPU optimizations core LBM algorithm achieve higher efficiency than state-of-the-art solvers in graphics. demonstrate accuracy efficacy our through various variety rigid body at high low Reynolds numbers. Finally, comparisons on benchmark data real experiments further highlight superiority