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Numerical simulation for turbulence-driven secondary motion over a streamwise external corner

Moinuddin, Khalid A. M and Ooi, Andrew and Joubert, P. N (2011) Numerical simulation for turbulence-driven secondary motion over a streamwise external corner. Progress in Computational Fluid Dynamics, An International Journal , 11 (1). pp. 18-29. ISSN 1468-4349

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Abstract

Numerical simulation, based on a Reynolds Stress Model (RSM), of turbulent flow over a streamwise external corner is presented. This work is an extension of an earlier experimental study (Moinuddin et al., 2004), which identified a pair of counter-rotating vortices placed around the corner of a 6 m long model. Experimental data measured at an early station is used as the inlet condition for the numerical simulation. Mean flow and turbulence statistics from numerical simulation are compared with the experimental data at a downstream station and they are found to be in excellent qualitative agreement. For the scaled mean flow data, quantitative agreement is also very good. Investigation reveals that vorticity production by secondary shear stress is dominant in generating secondary flow over an external corner, which is opposite for the case of an internal corner as found by Xu and Pollard (2001).

Item Type: Article
Uncontrolled Keywords: ResPubID22897, secondary flow, external corner, RSM, Reynolds stress model, turbulence, vorticity
Subjects: Faculty/School/Research Centre/Department > Centre for Environmental Safety and Risk Engineering (CESARE)
FOR Classification > 0913 Mechanical Engineering
SEO Classification > 970112 Expanding Knowledge in Built Environment and Design
Depositing User: VUIR
Date Deposited: 27 Jun 2012 06:56
Last Modified: 10 Mar 2015 02:32
URI: http://vuir.vu.edu.au/id/eprint/7659
DOI: 10.1504/PCFD.2011.037569
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Citations in Scopus: 1 - View on Scopus

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