Efficient 2D Simulation on Moving 3D Surfaces. (24th November 2020)

• Record Type: Journal Article
• Authors: Morgenroth, D.; Reinhardt, S.; Weiskopf, D.; Eberhardt, B.
• Is Part Of: Computer graphics forum. Volume 39:Number 8(2020)
• Page Start: 27
• Page End: 38
• Publication Date: 2020-11-24
• Subjects: CCS Concepts -- Computing methodologies → Physical simulation; Computer graphics -- Periodicals; 006.605
• DOI: 10.1111/cgf.14098
• Languages: English
• ISSNs: 0167-7055

Abstract

Abstract: We present a method to simulate fluid flow on evolving surfaces, e.g., an oil film on a water surface. Given an animated surface (e.g., extracted from a particle‐based fluid simulation) in three‐dimensional space, we add a second simulation on this base animation. In general, we solve a partial differential equation (PDE) on a level set surface obtained from the animated input surface. The properties of the input surface are transferred to a sparse volume data structure that is then used for the simulation. We introduce one‐way coupling strategies from input properties to our simulation and we add conservation of mass and momentum to existing methods that solve a PDE in a narrow‐band using the Closest Point Method. In this way, we efficiently compute high‐resolution 2D simulations on coarse input surfaces. Our approach helps visual effects creators easily integrate a workflow to simulate material flow on evolving surfaces into their existing production pipeline.