FLUID-STRUCTURE INTERACTIONS SIMULATION AND VISUALIZATION USING ISPH APPROACH

Interactive simulations of fluids has long been an area of interest in computer graphics community. Improving simulation results with high degree of visualization plays a critical role in solving complex natural phenomena. In this paper, the incompressible smoothed particle hydrodynamics (ISPH) is improved via pressure stabilization and correcting divergence operator in solving the pressure Poisson equation. The pressure evaluation is stabilized by introducing the relaxation coefficient in the source terms including divergence of velocity and density invariance conditions; while the divergence operator is corrected using the kernel gradient normalization. The shifting technique is utilized for preventing the anisotropic distributions of particles. Then, the surface particles are visualized via extracting a polygonal mesh and constructing a triangle mesh representing the isosurface of a volumetric data using Marching Cubes (MC) algorithm. The impact of flows are simulated using the improved ISPH method which supports efficiently the stable viscous fluid simulations with large time steps, higher viscosities and resolutions. The experiments show that the efficiency of the simulation is significantly improved using the improved ISPH method compared to the benchmark results for the lid-driven cavity.