Momentum transport in a turbulent mixing layer
作者:
Reiyu Chein,
J. N. Chung,
T. R. Troutt,
期刊:
International Journal for Numerical Methods in Fluids
(WILEY Available online 1989)
卷期:
Volume 9,
issue 1
页码: 23-41
ISSN:0271-2091
年代: 1989
DOI:10.1002/fld.1650090104
出版商: John Wiley&Sons, Ltd
关键词: Momentum transport;Turbulent mixing layers;Discrete vortex method;Time‐dependent momentum fluctuations;Comparison with experiments;Large‐scale structures
数据来源: WILEY
摘要:
AbstractThe turbulent momentum transport phenomena in a two‐dimensional mixing layer are investigated numerically by a discrete vortex method. The numerical model and calculations are verified through a comparison with existing numerical simulations and experimental measurements. The main emphasis is placed on the exploration of the detailed time‐dependent instantaneous local momentum fluctuations and on the comparison of numerical results with available experimental measurements. The current simulations confirm qualitatively the various trends in the turbulent momentum flux and fluctuating components of the velocity in the mixing layer found with several experimental results. The study shows that similarity exists in turbulent momentum quantities along the axial direction of the mixing layer. The calculations also show a definite correlation between the passage of a large‐scale structure and a burst in the turbulent momentum flux. The probability density functions of the fluctuating quantities are shown to be mostly Gaussian‐like, with only a few exc
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