Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling

	Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling
	Liu Xiaopei; Pang Wai-Man; Qin Jing; Fu Chi-Wing
刊名	IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
	2014
英文摘要	This paper presents a novel approach to simulating turbulent flows by developing an adaptive multirelaxation scheme in the framework of lattice Boltzmann equation (LBE). Existing LBE methods in graphics simulations are usually insufficient for turbulent flows since the collision term disturbs the underlying stability and accuracy. We adopt LBE with the multiple relaxation time (MRT) collision model (MRT-LBE), and address this issue by enhancing the collision-term modeling. First, we employ renormalization group analysis and formulate a new turbulence model with an adaptive correction method to compute more appropriate eddy viscosities on a uniform lattice structure. Efficient algebraic calculations are retained with small-scale turbulence details while maintaining the system stability. Second, we note that for MRT-LBE, predicting single eddy viscosity per lattice node may still result in instability. Hence, we simultaneously predict multiple eddy viscosities for stress-tensor-related elements, thereby asynchronously computing multiple relaxation parameters to further enhance the MRT-LBE stability. With these two new strategies, turbulent flows can be simulated with finer visual details even on coarse grid configurations. We demonstrate our results by simulating and visualizing various turbulent flows, particularly with smoke animations, where stable turbulent flows with high Reynolds numbers can be faithfully produced.
收录类别	SCI
原文出处	http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6341727
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/5410]
专题	深圳先进技术研究院_集成所
作者单位	IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
推荐引用方式 GB/T 7714	Liu Xiaopei,Pang Wai-Man,Qin Jing,et al. Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling[J]. IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS,2014.
APA	Liu Xiaopei,Pang Wai-Man,Qin Jing,&Fu Chi-Wing.(2014).Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling.IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS.
MLA	Liu Xiaopei,et al."Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling".IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS (2014).