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Turbulent pipe flow: Statistics, Re-dependence, structures and similarities with channel and boundary layer flows
被引:15
作者:
El Khoury, George K.
[1
]
Schlatter, Philipp
[1
]
Brethouwer, Geert
[1
]
Johansson, Arne V.
[1
]
机构:
[1] Royal Inst Technol, KTH Mech, Linne FLOW Ctr, SE-10044 Stockholm, Sweden
来源:
1ST MULTIFLOW SUMMER WORKSHOP
|
2014年
/
506卷
关键词:
DIRECT NUMERICAL-SIMULATION;
FULLY-DEVELOPED PIPE;
REYNOLDS-NUMBERS;
D O I:
10.1088/1742-6596/506/1/012010
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
Direct numerical simulation data of fully developed turbulent pipe flow are extensively compared with those of turbulent channel flow and zero-pressure-gradient boundary layer flow for Re-tau up to 1 000. In the near-wall region, a high degree of similarity is observed in the three flow cases in terms of one-point statistics, probability density functions of the wall-shear stress and pressure, spectra, Reynolds stress budgets and advection velocity of the turbulent structures. This supports the notion that the near-wall region is universal for pipe and channel flow. Probability density functions of the wall shear stress, streamwise turbulence intensities, one-dimensional spanwise/azimuthal spectra of the streamwise velocity and Reynolds-stress budgets are very similar near the wall in the three flow cases, suggesting that the three cauonical wall-bounded flows share wally features. In the wake region, the wean streamwise velocity and Reynolds stress budgets show smile expected differences.
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页数:14
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