3D Simulation of Golf Ball Rain in New Smyrna 1969

On September 1, 1969, a severe storm hit New Smyrna, Florida, and residents witnessed an unusual phenomenon: dozens of golf balls falling from the sky. The most accepted theory suggests that a waterspout sucked up the contents of a nearby pond, launching the objects into the atmosphere. This event, documented as a meteorological rarity, offers a perfect case study for 3D physical simulation of natural disasters. 🌩️

Technical recreation with Bullet Physics, Rigid Body, and RealFlow 🎱

To validate the theory, we can model the pond and waterspout in Houdini using Bullet Physics. The first step is to generate a particle field representing the ascending water column, with vortex and turbulence forces. On this basis, the golf balls are added as rigid bodies, assigning them realistic mass and coefficient of restitution. In Maya, the Rigid Body system allows calculating collisions between the balls and their dispersion upon impact with the ground. Finally, RealFlow provides the fluid simulation of the original pond, showing how suction lowers the water level and drags the objects. The key is to adjust gravity and air friction parameters so that the final trajectory matches the testimonies of the time.

Reflection on validating the extraordinary 🤔

Beyond technical entertainment, this simulation demonstrates how fluid dynamics and rigid body tools can confirm or refute hypotheses about extreme events. By replicating the golf ball rain, we not only understand the mechanics of the waterspout but also appreciate the fragility of our infrastructures in the face of chaotic phenomena. The boundary between the absurd and the possible blurs when computational physics allows us to travel to the past and observe, from a virtual angle, how nature challenges our everyday logic.

How would you model in a 3D engine the physics of impact and dispersion of hundreds of spherical objects with different trajectories to recreate the golf ball rain of New Smyrna 1969 without the rendering crashing the system's performance?

(PS: Simulating catastrophes is fun until the computer melts down and you are the catastrophe.)