A numerical study of turbulent line puffs via the renormalization group   (RNG) k-epsilon model

doi:10.1002/(SICI)1097-0363(19980130)26:2&lt;217::AID-FLD637&gt;3.0.CO;2-G

CORC > 北京大学 > 环境科学与工程学院

	A numerical study of turbulent line puffs via the renormalization group (RNG) k-epsilon model
	Lee, JHW ; Chen, GQ
刊名	international journal for numerical methods in fluids
	1998
关键词	puffs and thermals turbulence modelling jets and plumes environmental fluid mechanics vortex flow added mass CROSS-FLOW
DOI	10.1002/(SICI)1097-0363(19980130)26:2<217::AID-FLD637>3.0.CO;2-G
英文摘要	The time evolution of a line puff, a turbulent non-buoyant element with significant momentum, is studied using the renormalization group (RNG) k-epsilon model. The numerical results show that the puff motion is characterized by a vortex pair flow; the computed flow details and scalar mixing characteristics can be described by self-similar relations beyond a dimensionless time of around 30. The added mass coefficient of the puff motion is found to be approximately unity. The predicted puff how and mixing rate are substantially similar to those obtained from the standard k-epsilon model and are well supported by experimental data. The computed scalar field reveals significant secondary concentration peaks trailing behind in the wake of the puff. The present results suggest that the overall mixing rate of a puff is primarily determined by the large-scale motion and that streamline curvature probably prays a minor role. (C) 1998 John Wiley & Sons, Ltd.; Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas; SCI(E); 8; ARTICLE; 2; 217-234; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/216307]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Lee, JHW,Chen, GQ. A numerical study of turbulent line puffs via the renormalization group (RNG) k-epsilon model[J]. international journal for numerical methods in fluids,1998.
APA	Lee, JHW,&Chen, GQ.(1998).A numerical study of turbulent line puffs via the renormalization group (RNG) k-epsilon model.international journal for numerical methods in fluids.
MLA	Lee, JHW,et al."A numerical study of turbulent line puffs via the renormalization group (RNG) k-epsilon model".international journal for numerical methods in fluids (1998).