Interface Reconstruction of Multiple Immiscible Fluids

We present a particle-based approach for animating multiple interacting liquids that can handle a number of immiscible fluids. We solve the usual problem of robust interface tracking by reconstructing the zero level set of our novel composite implicit function. Its recurrent formulation handles directly interfaces between any number of liquids including their free surfaces. To further enhance visual quality of the interfaces, we identify and refine particles in the vicinity of the surface. Our extraction scheme of near-surface particles robustly handles irregular distributions and rapid oscillations during the marking process. The surface is refined by upsampling new points along splines formed between neighbor particles. This strategy gives us smoother interfaces while having faster computation compared to a full simulation in a higher resolution. The proposed improvements can be easily implemented into the common smoothed-particle hydrodynamics framework.