Ships, Splashes, and Waves on a Vast Ocean (SIGGRAPH Asia 2021) 

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Ships, Splashes, and #Waves on a Vast #Ocean
ACM Transactions on Graphics (#SIGGRAPH Asia 2021)
Libo Huang¹, Ziyin Qu²³, Xun Tan⁴, Xinxin Zhang⁴, Dominik L. Michels¹, Chenfanfu Jiang²³
¹#KAUST Visual Computing Center
²#UCLA
³#UPenn
⁴#Zenus Technology
Project Page: computationalsc...
Abstract: The simulation of large open water surface is challenging using a uniform volumetric discretization of the Navier-Stokes equations. Simulating water splashes near moving objects, which height field methods for water waves cannot capture, necessitates high resolutions. Such simulations can be carried out using the Fluid-Implicit-Particle (FLIP) method. However, the FLIP method is not efficient for the long-lasting water waves that propagate to long distances, which require sufficient depth for a correct dispersion relationship. This paper presents a new method to tackle this dilemma through an efficient hybridization of volumetric and surface-based advection-projection discretizations. We design a hybrid time-stepping algorithm that combines a FLIP domain and an adaptively remeshed Boundary Element Method (BEM) domain for the incompressible Euler equations. The resulting framework captures the detailed water splashes near moving objects with the FLIP method, and produces convincing water waves with correct dispersion relationships at modest additional costs.
Acknowledgements: The yacht 3D model is available on sketchfab.com/... and also used within • Houdini 18.5 Flip smal... which inspired the authors to use it.