Structure of turbulent heat flux in a flow over a heated wavy wall

Nils Kruse; Philipp Rudolf von Rohr

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Structure of turbulent heat flux in a flow over a heated wavy wall

机译：波浪状加热壁上流动中湍流通量的结构

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摘要

A particle image thermometry technique is proposed to determine the turbulent heat flux in a water channel between a sinusoidal heated bottom and a flat top wall. Reynolds numbers between 2400 and 20,500 are considered. A proper orthogonal decomposition of combined velocity and temperature fields reveals a quantitative agreement between large-scale thermal and momentum structures. The distribution of budget terms of the streamwise and wall-normal heat fluxes are similar to those for the two Reynolds stress components. Co-spectra indicate that larger scale structures make a significant contribution to the streamwise heat flux and smaller scales are more important to the wall-normal heat flux.

机译：提出了一种粒子图像测温技术来确定正弦加热的底部和平坦的顶壁之间的水通道中的湍流热通量。雷诺数在2400到20500之间。适当的速度和温度场组合的正交分解揭示了大规模热力和动量结构之间的定量一致性。流向和壁面法向热通量的预算项分布与两个雷诺应力分量相似。共谱表明，较大尺度的结构对沿流方向的热通量有重要贡献，而较小尺度的结构对壁面法向热通量更重要。

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来源
《International Journal of Heat and Mass Transfer》 |2006年第20期|p.3514-3529|共16页
作者
Nils Kruse; Philipp Rudolf von Rohr;
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作者单位

Institute of Process Engineering, ETH Zurich, 8092 Zurich, Switzerland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程理论;热学;
关键词
particle image thermometry; heat flux; wavy wall; turbulent flow;

机译：颗粒图像测温;热通量;波浪壁;湍流;

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2. Structural dissimilarity of large-scale structures in turbulent flows over wavy walls [J] . Zenklusen A., Kuhn S., Von Rohr P.R. Physics of fluids . 2012,第5期

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4. Effects Of Entrance Region Transport Processes On Slip Flow Regime In A Wavy Wall Microchannel With Isothermally Heated Walls [C] . H. Shokouhmand, S. Bigham World Congress on Engineering . 2010

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5. A Numerical and Experimental Evaluation of the Turbulent Heat Flux in a Heated Jet in Crossflow [D] . Borghi, Michael R., Jr. 2018

机译：横流中热射流湍流通量的数值和实验评估
6. Small viscosity asymptotics for the inertial range of local structure and for the wall region of wall-bounded turbulent shear flow. [O] . G I Barenblatt, A J Chorin 1996

机译：对于局部结构的惯性范围和有边界的湍流剪切流的壁区域其粘度渐近较小。
7. Analysis of Energy Flux Vector on Natural Convection Heat Transfer in Porous Wavy-Wall Square Cavity with Partially-Heated Surface [O] . Yan-Ting Lin, Ching-Chang Cho 2019

机译：具有部分加热表面的多孔波纹壁方腔自然对流传热的能量通量载体分析
8. Large Eddy Simulation of Turbulent Flow in Channels with Wavy Walls Including Both Compliant Walls and Walls with Prescribed Motion. [R] . Kuhn, G. D., Ferziger, J. H., Moin, P., 1984

机译：含有规定运动的柔性壁和墙体的波浪形通道内湍流的大涡模拟。

Structure of turbulent heat flux in a flow over a heated wavy wall

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