Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/137316
Title: Quadrant analysis of turbulence in a rectangular cavity with large aspect ratios
Authors: Guan, Dawei
Agarwal, Prakash
Chiew, Yee-Meng
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Guan, D., Agarwal, P., & Chiew, Y.-M. (2018). Quadrant analysis of turbulence in a rectangular cavity with large aspect ratios. Journal of Hydraulic Engineering, 144(7), 04018035-. doi:10.1061/(ASCE)HY.1943-7900.0001480
Journal: Journal of Hydraulic Engineering
Abstract: By using particle image velocimetry techniques, this paper presents new insights on the turbulence structure and time-averaged flows in a rectangular cavity with large aspect ratios. The three cavity aspect ratios (L=D, where L = cavity length, D = cavity depth) used in this study are 9.9, 13.0, and 18.9. The time-averaged velocity fields and Reynolds shear stress distributions within the cavity show that the flow pattern and turbulence structures are strongly affected by the cavity aspect ratio. The quadrant dynamic analysis of velocity fluctuations on the cavity shear layers and cavity downstream edge for the three cavities is conducted. Considering all of the bursting events with hole size parameter, H = 0 in the measured planes, sweeps are found to have the highest probability of occurrence within the zone of the shear layer, and ejections dominate almost all of the areas within the cavity and a certain depth of flow immediately above the shear layer. For the highmagnitude events (H = 1), quadrant dominances are almost inverted for all of the measured planes. The quadrant shear stress distributions show that the opposing events are approximately balanced for these regions on the cavity shear layers and along the cavity downstream edge.
URI: https://hdl.handle.net/10356/137316
ISSN: 0733-9429
DOI: 10.1061/(ASCE)HY.1943-7900.0001480
Rights: © 2018 ASCE. All rights reserved. This paper was published in Journal of Hydraulic Engineering and is made available with permission of ASCE.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

Files in This Item:
File Description SizeFormat 
quadrant analysis of turbulence in a rectangle.pdf
3.02 MBAdobe PDFView/Open

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.