Turbulent open channel flow with heat transfer subjected to the control of a spanwise travelling wave
Turbulent open channel flow with heat transfer subjected to the control of a spanwise travelling wave
复制标题
受展向行波控制的具有传热的湍流明渠流
DOI：
10.1016/j.ijheatmasstransfer.2009.03.072
复制
发表时间：
2009-09
影响因子：
5.2
通讯作者：
Wang, Lei
中科院分区：
文献类型：
--
作者：
Liu, Nan-Sheng;Lu, Xi-Yun;Wang, Lei
通过直接数值模拟（DNS）研究了受展向行波控制的传热湍流明渠流。使用分数步法对三维纳维-斯托克斯方程和能量方程进行数值求解。展向行波是由体积力引起的，该体积力被限制在粘性层内，其最大值在底壁处，并在远离粘性层时呈指数衰减。本研究的目的是揭示展向行波控制下的近壁湍流行为、湍流传热和热结构。研究了展向行波的三个典型频率，即高频、中频和低频，对应于T+=25、50和100的激励周期，以揭示湍流运动和传热的动力学。普朗特数（Pr）从1到100不等。为了阐明湍流统计和传热的行为，一些典型的量，包括平均速度、速度和涡度波动、温度及其波动、湍流热通量以及温度波动的结构，都被展示和分析。
Turbulent open channel flows with heat transfer subjected to the control of a spanwise travelling wave have been investigated by means of direct numerical simulation (DNS). The three-dimensional Navier–Stokes and energy equations are numerically solved using a fractional-step method. The spanwise travelling wave is induced by a body force that is confined within the viscous layer with its maximum at the bottom wall and decaying exponentially away from it. The objective of this study is to reveal the near-wall turbulence behaviours, the turbulent heat transfer, and thermal structures under the control of the spanwise travelling wave. Three typical frequencies of the spanwise travelling wave, i.e., high-, middle- and low-frequency, corresponding to the exciting periods at T+=25, 50 and 100, are investigated to reveal the dynamics of turbulent motions and heat transfer. The Prandtl number (Pr) varies from 1 up to 100. To elucidate the behaviours of turbulence statistics and heat transfer, some typical quantities, including the mean velocity, velocity and vorticity fluctuations, temperature and its fluctuation, turbulent heat fluxes, and the structures of the temperature fluctuation, are exhibited and analyzed.
登录
查看更多内容
影响因子：
5.2
作者：
R. Antonia;John Kim
通讯作者：
R. Antonia;John Kim
DOI：
--
发表时间：
1996-11
期刊：
--
影响因子：
--
作者：
D. Nosenchuck
通讯作者：
D. Nosenchuck
影响因子：
4.6
作者：
Waleffe, F
通讯作者：
Waleffe, F
影响因子：
2.4
作者：
R. Volino;Geoffrey B. Smith
通讯作者：
R. Volino;Geoffrey B. Smith
影响因子：
4.6
作者：
M. Rashidi
通讯作者：
M. Rashidi