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Synthetic fluid details for the vorticity loss in advection
Jian Zhu1; Yu Luo1; Xiaohua Ren2; Ruichu Cai1; Zhifeng Hao3; Hanqiu Sun4; Enhua Wu2,5
2018-05-01
Conference NameConference on Computer Animation and Social Agents (CASA)
Source PublicationCOMPUTER ANIMATION AND VIRTUAL WORLDS
Volume29
Issue3-4
Conference Date2018
Conference PlaceBeijing, PEOPLES R CHINA
Publication Place111 RIVER ST, HOBOKEN 07030-5774, NJ USA
PublisherWILEY
Abstract

In this paper, a novel method with good numerical stability is proposed from the perspective of energy preserving to alleviate the numerical dissipations in the advection step of Eulerian fluid simulation. The main idea is to measure the vorticity loss during advection, calculate the lost angular kinetic energy with a proposed scheme, and then synthesize a high-frequency incompressible details field to compensate the lost energy in a way that is consistent with Kolmogorov's theory, which prevents the synthetic details from interfering with the existing fluid flow. The method works independently of the advection scheme and can be easily combined with other advection schemes to enhance the effect. It adds only 5% to 10% of the computational overhead while producing convincing fluid details without changing the overall behavior of the original flow.

KeywordAdvection Angular Kinetic Energy Numerical Dissipation Turbulence Synthesis Vorticity
DOIhttps://doi.org/10.1002/cav.1834
URLView the original
Indexed BySCI ; CPCI
Language英语
WOS Research AreaComputer Science
WOS SubjectComputer Science, Software Engineering
WOS IDWOS:000434083100025
The Source to ArticleWOS
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Document TypeConference paper
专题DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Faculty of Science and Technology
Affiliation1.School of Computers, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
2.University of Macau, Macao, China
3.Foshan University, Foshan, China
4.The Chinese University of Hong Kong, Hong Kong, China
5.University of Macau, Macao, China Institute of Software, Chinese Academy of Sciences, Beijing, China
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GB/T 7714
Jian Zhu,Yu Luo,Xiaohua Ren,et al. Synthetic fluid details for the vorticity loss in advection[C]. 111 RIVER ST, HOBOKEN 07030-5774, NJ USA:WILEY,2018.
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