Reducing numerical dissipation in smoke simulation |
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Affiliation: | 1. Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, NJ 07102, United States;2. Department of Mathematics and Statistics, Texas Tech University, Lubbock, TX 79409, United States;1. Advanced Institute for Manufacturing with High-Tech Innovations (AIM-HI), Department of Mechanical Engineering, National Chung Cheng University, 168 University Road, 621, Minhsiung, Chiayi, Taiwan;2. China Steel Corporation, Chung-Kang Rd, Siaogang District, 812, Kaohsiung, Taiwan |
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Abstract: | Numerical dissipation acts as artificial viscosity to make smoke viscous. Reducing numerical dissipation is able to recover visual details smeared out by the numerical dissipation. Great efforts have been devoted to suppress the numerical dissipation in smoke simulation in the past few years. In this paper we investigate methods of combating the numerical dissipation. We describe visual consequences of the numerical dissipation and explore sources that introduce the numerical dissipation into course of smoke simulation. Methods are investigated from various aspects including grid variation, high-order advection, sub-grid compensation, invariant conservation, and particle-based improvement, followed by discussion and comparison in terms of visual quality, computational overhead, ease of implementation, adaptivity, and scalability, which leads to their different applicability to various application scenarios. |
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Keywords: | Smoke and gaseous phenomena Physically based methods Numerical scheme Numerical dissipation |
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