Turbulence originating from the compromise-in-competition between viscosity and inertia

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	Turbulence originating from the compromise-in-competition between viscosity and inertia
	Wang, Limin 1; Qiu, Xiaoping 1,2; Zhang, Lin 1; Li, Jinghai 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2016-09-15
卷号	300 期号:SEP 页码:83-97
关键词	Turbulent flows Stability criterion Principle of compromise-in-competition EMMS-based turbulence model Meso-scale Multi-scale
ISSN号	1385-8947
英文摘要	Fluid flows in chemical engineering are mainly characterized by the coexistence of turbulent and non turbulent fluids. Nonetheless, in traditional turbulence models, the laminar portion of the fluid flow is often neglected and constitutive laws are expressed to describe fully turbulent states within computational grids. We perceived this situation is a source of inaccuracies in modeling practical engineering flows. In this work, a stability criterion for turbulent flows, originating from the principle of compromise-in-competition between viscosity and inertia, is used to obtain closure in the turbulence model, which defines the energy-minimization multi-scale (EMMS)-based turbulence model. Analogous to two-phase flow, the model regards single-phase complex flows as a mixture of turbulent and non-turbulent fluids, and the effect of meso-scale eddy structure on the effective coefficient of viscosity is also considered. The EMMS-based turbulence model is tested against three benchmark problems, namely, the lid-driven cavity problem, flow through a conical diffuser, and flow over an airfoil using experimental and direct numerical simulation (DNS) data. Numerical results show that the EMMS-based turbulence model improves the accuracy of turbulence modeling, demonstrating its feasibility and practicality for accurate simulations of engineering complex flows. (C) 2016 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	LARGE-EDDY-SIMULATION ; SOLID 2-PHASE FLOW ; BUBBLE-COLUMNS ; 2-FLUID MODEL ; STABILITY CONDITION ; REGIME TRANSITION ; CFD-SIMULATION ; EMMS MODEL ; NATURAL-CONVECTION ; 2-EQUATION MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000378181400010
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/21161]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Limin,Qiu, Xiaoping,Zhang, Lin,et al. Turbulence originating from the compromise-in-competition between viscosity and inertia[J]. CHEMICAL ENGINEERING JOURNAL,2016,300(SEP):83-97.
APA	Wang, Limin,Qiu, Xiaoping,Zhang, Lin,&Li, Jinghai.(2016).Turbulence originating from the compromise-in-competition between viscosity and inertia.CHEMICAL ENGINEERING JOURNAL,300(SEP),83-97.
MLA	Wang, Limin,et al."Turbulence originating from the compromise-in-competition between viscosity and inertia".CHEMICAL ENGINEERING JOURNAL 300.SEP(2016):83-97.