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On the reliability of Reynolds-averaged Navier Stokes prediction of mean flow characteristics of a rectangular turbulent jet in crossflow

Yao, Y. F.; Khali, E.; Khali, El Hadi; Yao, Yufeng

Authors

Y. F. Yao

E. Khali

El Hadi Khali

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering



Abstract

A jet of fluid discharging into a cross stream, also known as Jet In Crossflow (JICF), has received many experimental and numerical investigations. In addition to the fundamental understanding of three-dimensional mixing and shear flow characteristics, the fluid dynamics research community often regarded it as a benchmark test case for validating turbulence models. Although many authors considered the canonical case of a jet issuing from a circular orifice, the rectangular shape has received less numerical investigations. The present study deals with a jet issuing from a rectangular duct into a confined crossflow domain in which five jet-to-crossflow velocity ratios ranging from 3.3 to 10 are considered. The analysis focuses on the reliability of three two-equation turbulence models, namely k-ε, k-� and SST in predicting this type of complex flow phenomena. Comparisons with previous large-eddy simulation results and available test data for the same problem have revealed good agreement in predicting �mean� flow properties, but relative poor agreement in predicting the second-order statistics. It indicates that this type of flow exhibits significant non-equilibrium behavior for which the commonly used two-equation turbulence models are unable to deal with. Thus it is necessary to apply anisotropic turbulence model such as Reynolds stress model or high-fidelity large-eddy simulation method.

Journal Article Type Article
Publication Date Jan 1, 2014
Journal American Journal of Applied Sciences
Publisher Science Publications
Peer Reviewed Peer Reviewed
Volume 11
Issue 9
Pages 1645-1658
APA6 Citation Khali, E. H., & Yao, Y. (2014). On the reliability of Reynolds-averaged Navier Stokes prediction of mean flow characteristics of a rectangular turbulent jet in crossflow. American Journal of Applied Sciences, 11(9), 1645-1658. https://doi.org/10.3844/ajassp.2014.1645.1658
DOI https://doi.org/10.3844/ajassp.2014.1645.1658
Keywords reliability, Reynolds averaged Navier Stokes, prediction, rectangular turbulent jet, crossflow
Publisher URL http://www.thescipub.com/abstract/10.3844/ajassp.2014.1645.1658
Related Public URLs http://thescipub.com/issue-ajas/11/9
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