A combining method of fluid animations by interpolating flow fields

The computational cost for creating realistic fluid animations by simulation is generally very expensive. In digital production environment, existing precomputed fluid animations are often reused for different scenes in order to reduce the cost for creating scenes containing fluids. However, applying same animations to different scenes produces unacceptable results, so the animation needs to be edited. In order to do this, we develop a method for synthesizing desired flow fields by combining existing flow fields. Our system allows the user to place existing flow fields at arbitrary positions, and combine them by interpolating the regions between these flow fields, to synthesize a new flow field. The interpolation of the flow fields is realized by solving a minimization problem. Our minimization problem consists of two energy functions for smoothly interpolating the velocities and satisfying the incompressibility. Our method can create the desired incompressible flow fields by reusing existing flow fields.