Visual Simulation of Detailed Turbulent Water by Preserving the Thin Sheets of Fluid

Abstract

When we perform particle-based water simulation, water particles are often increased dramatically because of particle splitting around breaking holes to maintain the thin fluid sheets. Because most of the existing approaches do not consider the volume of the water particles, the water particles must have a very low mass to satisfy the law of the conservation of mass. This phenomenon smears the motion of the water, which would otherwise result in splashing, thereby resulting in artifacts such as numerical dissipation. Thus, we propose a new fluid-implicit, particle-based framework for maintaining and representing the thin sheets and turbulent flows of water. After splitting the water particles, the proposed method uses the ghost density and ghost mass to redistribute the difference in mass based on the volume of the water particles. Next, small-scale turbulent flows are formed in local regions and transferred in a smooth manner to the global flow field. Our results show us the turbulence details as well as the thin sheets of water, thereby obtaining an aesthetically pleasing improvement compared with existing methods.

Efficient preservation and breakup of liquid sheets using screen-projected particles

“…While these approaches are excellent for liquid sheets, the liquid sheets are over-preserved during the process of splitting one fluid particle into two, resulting in noisy fluid surfaces (see Fig 1-right). Recently, research has also been carried out to restore turbulence flow lost by preserving liquid sheets by redistributing the mass according to the number of fluid particles [24]. In addition, techniques have been proposed that synthesize fluids using machine learning techniques to reduce computation time.…”