Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Square Duct with Rayleigh-Benard Convection on the Cross Section

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Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Square Duct with Rayleigh-Benard Convection on the Cross Section

更新时间：2025-07-09

- Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Square Duct with Rayleigh-Benard Convection on the Cross Section
- Vol. 45, Issue 6, Pages: 124-129(2011)
- 作者机构：
  
  1. 西安交通大学热流科学与工程教育部重点实验室,西安,710049
  2. 大连理工大学建设工程学部,大连,116024
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Online First：10 June 2011，
  
  Published：2011
- 稿件说明：
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Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Square Duct with Rayleigh-Benard Convection on the Cross Section[J]. 2011, 45(6): 124-129.
DOI：

Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Square Duct with Rayleigh-Benard Convection on the Cross Section[J]. 2011, 45(6): 124-129. DOI：

摘要

基于动态Smagorinsky涡黏模型对矩形通道截面内具有Rayleigh-Benard对流的湍流充分流动和换热问题进行了大涡模拟研究

分析了浮升力对管道截面的平均速度、温度分布以及雷诺应力的影响.湍流雷诺数为400

格拉晓夫数从10

变化到10

.研究结果表明:随着格拉晓夫数的增大

浮升力增强

通道内平均速度减小; 亚格子黏性系数明显增大

湍流强度增强

换热也明显增强; 由于浮升力的存在

在高温壁面附近

主流湍动能减小

展向湍流强度大大增强; 初始条件对平均速度及温度的分布有一定的影响

但对平均的阻力系数及换热系数没有影响.

Abstract

Large eddy simulations are performed on a fully developed turbulent flow and heat transfer in a square duct with Rayleigh-Benard convection on the basis of the dynamical Smagorinsky eddy viscosity model at turbulent Reynolds number 400 and different Grashof-numbers from 10

to 10

. The influences of the buoyancy force on the mean flow

heat transfer and turbulent intensity are analyzed. The results show that the mean velocity decreases while the subgrid viscosity

turbulent intensity and heat transfer increase obviously with an increase in Grashof-number. Moreover

the turbulent intensity in the streamwise direction decreases while the turbulent intensity in the spanwise direction increases clearly near the wall with high temperature because of the buoyancy force. In addition

the initial conditions have a slight in

fluence on the resolved-averaged velocity and temperature distributions but no effect on the mean friction factor and heat transfer coefficient.

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references

IIDA O, KASAGI N. Direct numerical simulation of unstably stratified turbulent channel flow [J]. ASME J Heat Transfer, 1997, 119(1): 53-61.

LUMLEY J L, ZEMAN O, SIESS J. The influence of buoyancy on turbulent transport [J]. J Fluid Mech, 1978, 84(3): 581-597.

DOMARADZKI J A, METCALFE R W. Direct numerical simulations of the effects of shear on turbulent Reyleigh-Benard convection [J]. J Fluid Mech, 1988, 193(4): 499-531.

FUKUI K, NAKAJIMA M. Unsteady stratification effects on turbulent shear flow in the wall region [J]. International Journal of Heat Mass Transfer, 1985, 28(12): 2343-2352.

FUKUI K, NAKAJIMA M, UEDA H. Coherent structure of turbulent longitudinal vortices in unsteady-stratified turbulent flow [J]. International Journal of Heat Mass Transfer, 1991, 34(9): 2373-2385.

董宇红.热剪切湍流的直接数值模拟和大涡模拟研究[D].合肥:中国科学技术大学,2004.

Kenjeres S, Hanjalic K. Transient analysis of Rayleigh-Benard convection with a RANS model [J]. International Journal of Heat and Fluid Flow, 1999, 20(3): 329-340.

KIMMEL S J, DOMARADZKI J A. Large eddy simulations of Rayleigh-Benard convection using subgrid scale estimation model [J]. Physics of Fluids, 2000, 12(1): 169-183.

LEONG W H, HOLLANDS K G T, BRUNGER A P. Experimental Nusselt numbers for a cubical-cavity benchmark problem in natural convection [J]. International Journal of Heat Mass Transfer, 1999, 42(11): 1979-1989.

PALLARES J, ARROYO M P, GRAU F X, et al. Rayleigh-Benard convection in cubical cavity: experimental and numerical flow topologies [J]. Exp Fluids, 2001, 31(2): 208-218.

PALLARES J, CUESTA I, GRAU F X. Laminar and turbulent Rayleigh-Benard convection in a perfectly conducting cubical cavity [J]. International Journal of Heat and Fluid Flow, 2002, 23(3): 346-358.

马良栋.矩形截面通道内强化对流换热机理的研究及湍流换热的高级数值模拟 [D].西安:西安交通大学,2007.

KAJISHIMA T, MIYAKE Y. A discussion on eddy viscosity models on the basis of the large eddy simulation of turbulent flow in a square duct [J]. Computers Fluids, 1992, 21(2): 151-161.

MADABHUSHI R K, VANKA S P. Large eddy simulation of turbulence-driven secondary flow in a square duct [J]. Phys Fluids: A, 1991, 3(11): 2734-2745.

PILLER M, NOBILE E. Direct numerical simulation of turbulent heat transfer in a square duct [J]. International Journal of Numerical Methods for Heat and Fluid Flow, 2002, 12(6): 658-686.

李光熙.湍流的直接模拟及微尺度流动和换热研究[D].西安:西安交通大学,2005.

有限体积法与LBM分区耦合模拟方腔自然对流. 西安交通大学学报,2011, 45(5):78-83.

浮升力在竖直通道湍流中的作用. 西安交通大学学报,2011, 45(1):21-25.

轴向旋转通道内浮升力对湍流影响的直接模拟. 西安交通大学学报,2010, 44(9):11-15.

LBM与宏观数值方法界面信息耦合的重构算子. 西安交通大学学报,2009, 43(11):6-10.

旋转矩形通道内湍流雷诺应力分析. 西安交通大学学报,2009, 43(7):6-10.

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