Daytime Fireworks Simulation with Parachute Based on Aerodynamics

Abstract

This paper proposes a method to reproduce daytime fireworks as CG animation using physical simulations. Daytime fireworks are a kind of fireworks and this paper focuses on daytime fireworks called ”Enryu”. Enryu is a firework that launches the parachute with the smoke candle and watch the smoke follow a spiral trajectory as the parachute falls. In this paper, we simulate Enryu by combining the simulation of the parachute and the smoke from the fluid simulation. In the simulation of the parachute, the top part is modeled as a parachute model based on aerodynamics, the bottom part is modeled as a single mass point, and the string connecting the two part is represented by spring and damper. We simulated smoke by grid-based fluid simulation, and Enryu is simulated by blowing smoke from the bottom part of the parachute.