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Numerical Study of Correlation of Fluid Particle Acceleration and Turbulence Intensity in Swirling Flow
Joint Authors
Gui, Nan
Yang, Xingtuan
Tu, Jiyuan
Jiang, Shengyao
Yan, Jie
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-24
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Numerical investigation of correlation between the fluid particle acceleration and the intensity of turbulence in swirling flows at a large Reynolds number is carried out via direct numerical simulation.
A weak power-law form correlation u r .
m .
s E ~ C ( a L ) φ between the Lagrangian acceleration and the Eulerian turbulence intensity is derived.
It is found that the increase of the swirl level leads to the increase of the exponent φ and the trajectory-conditioned correlation coefficient ρ ( a L , u E ) and results in a weak power-law augmentation of the acceleration intermittency.
The trajectory-conditioned convection of turbulence fluctuation in the Eulerian viewpoint is generally linearly proportional to the fluctuation of Lagrangian accelerations, indicating a weak but clear relation between the Lagrangian intermittency and Eulerian intermittency effects.
Moreover, except the case with vortex breakdown, the weak linear dependency is maintained when the swirl levels change, only with the coefficient of slope varied.
American Psychological Association (APA)
Gui, Nan& Yang, Xingtuan& Yan, Jie& Tu, Jiyuan& Jiang, Shengyao. 2015. Numerical Study of Correlation of Fluid Particle Acceleration and Turbulence Intensity in Swirling Flow. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1073132
Modern Language Association (MLA)
Gui, Nan…[et al.]. Numerical Study of Correlation of Fluid Particle Acceleration and Turbulence Intensity in Swirling Flow. Mathematical Problems in Engineering No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1073132
American Medical Association (AMA)
Gui, Nan& Yang, Xingtuan& Yan, Jie& Tu, Jiyuan& Jiang, Shengyao. Numerical Study of Correlation of Fluid Particle Acceleration and Turbulence Intensity in Swirling Flow. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1073132
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1073132