Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19636
Title: Velocity fluctuations in a particle-laden turbulent flow over a backward-facing step
Authors: Wang, B
Zhang, HQ
Chan, CK 
Wang, XL
Keywords: Frequency spectrum
Large eddy simulation
Time series
Two-phase turbulent flow
Velocity fluctuation
Issue Date: 2004
Publisher: Tech Science Press
Source: Computers, Materials and Continua, 2004, v. 1, no. 3, p. 275-288 How to cite?
Journal: Computers, Materials and Continua 
Abstract: Dilute gas-particle turbulent flow over a backward-facing step is numerically simulated. Large Eddy Simulation (LES) is used for the continuous phase and a Lagrangian trajectory method is adopted for the particle phase. Four typical locations in the flow field are chosen to investigate the two-phase velocity fluctuations. Time-series velocities of the gas phase with particles of different sizes are obtained. Velocity of the small particles is found to be similar to that of the gas phase, while high frequency noise exists in the velocity of the large particles. While the mean and rms velocities of the gas phase and small particles are correlated, the rms velocities of large particles have no correlation with the gas phase. The frequency spectrum of the velocity of the gas phase and the small particle phase show the -5/3 decay for higher wave number, as expected in a turbulent flow. However, there is a "rising tail" in the high frequency end of the spectrum for larger particles. It is shown that large particles behave differently in the flow field, while small particles behave similarly and dominated by the local gas phase flow.
URI: http://hdl.handle.net/10397/19636
ISSN: 1546-2218
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

8
Citations as of Apr 11, 2016

WEB OF SCIENCETM
Citations

10
Last Week
0
Last month
0
Citations as of Aug 14, 2017

Page view(s)

56
Last Week
1
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.