Abstract: A physically based algorithm for fluid movement simulation was proposed．Compared with the traditional simulation technique,physically based simulation can represent realistic movement better．The full Navier-Stokes equations are used as the model,and the operator splitting method is employed to split the model into external force term,advection term,diffusion term and projection term．Every step is stable,so the whole process is also stable．Thus,the large timestep can be taken in the fluid movement simulation.

Key words: Physically based,Fluid movement,Realistic simulation