Fluid simulation is a computer graphics technique used to create realistic representations of liquids and gases. It involves mathematical models that mimic the behavior of fluids, allowing for the visualization of phenomena like water flowing, smoke rising, or fire spreading. These simulations are essential in various fields, including video games, movies, and scientific research. The process typically uses algorithms to calculate how fluids interact with their environment and each other. Techniques such as Navier-Stokes equations help predict fluid motion, while particle systems can represent individual fluid particles. This technology enhances visual effects and provides insights into fluid dynamics.