Shallow Sand Equations: Real-Time Height Field Simulation of Dry Granular Flows.

Clicks: 497
ID: 81155
2019
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Ranked #1 of 32 articles by views in ieee transactions on visualization and computer graphics

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Abstract
Granular media is the second-most-manipulated substance on Earth, second only to water. However, simulation of granular media is still challenging due to the complexity of granular materials and the large number of discrete solid particles. As we know, dry granular materials could form a hybrid state between a fluid and a solid, therefore we propose a two-layer model and divide the simulation domain into a dilute layer, where granules can move freely as a fluid, and a dense layer, where granules act more like a solid. Motivated by the shallow water equations, we derive a set of shallow sand equations for modeling dry granular flows by depth-integrating three-dimensional governing equations along its vertical direction. Unlike previous methods for simulating a 2D granular media, our model does not restrict the depth of the granular media to be shallow anymore. To allow efficient fluid-solid interactions, we also present a ray casting algorithm for one-way solid-fluid coupling. Finally, we introduce a particle-tracking method to improve the visual representation. Our method can be efficiently implemented based on a height field and is fully compatible with modern GPUs, therefore allows us to simulate large-scale dry granular flows in real time.
Reference Key
zhu2019shallowieee Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhu, Kuixin;He, Xiaowei;Li, Sheng;Wang, Hongan;Wang, Guoping;
Journal ieee transactions on visualization and computer graphics
Year 2019
DOI
10.1109/TVCG.2019.2944172
URL
Keywords
molecular dynamics gpcr enhanced sampling generalized ensemble membrane protein molecular docking potential of mean force

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