Scale is crucial for the behavior of any simulation. The real-world size of the Simulator in units is important for the simulation dynamics. Large scale simulations appear to move slower, while mid-to-small scale simulations have lots of vigorous movements. When you create your Simulator, you must check the Grid rollout where the real-world extents of the Simulator are shown. If the size of the Simulator in the scene cannot be changed, you can cheat the solver into working as if the scale is larger or smaller by changing the Scene Scale option in the Grid rollout. The Phoenix solver is not affected by how you choose to view the Display Unit Scale - it is just a matter of convenience. As the focus of this tutorial is a large-scale simulation, setting the units to Meters is a reasonable choice. Go to Customize → Units Setup and set Display Unit Scale to Metric Meters. Also, set the System Units such that 1 Unit equals 1 Meter. |