![]() ![]() ![]() This allowed for much larger time steps and therefore faster simulations. In 1999, Jos Stam published the "Stable Fluids" method, which exploited a semi-Lagrangian advection technique and implicit integration of viscosity to provide unconditionally stable behaviour. Up to that point, a variety of simpler methods had primarily been used, including ad-hoc particle systems, lower dimensional techniques such as height fields, and semi-random turbulent noise fields. The development of fluid animation techniques based on the Navier–Stokes equations began in 1996, when Nick Foster and Dimitris Metaxas implemented solutions to 3D Navier-Stokes equations in a computer graphics context, basing their work on a scientific CFD paper by Harlow and Welch from 1965. ![]() Simulation of two fluids with different viscosities ![]()
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