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http://dx.doi.org/10.9766/KIMST.2014.17.6.861

Evaluation of URANS Turbulence Models through the Prediction of the Flow around a Circular Cylinder  

Kim, Minjae (The 6th Research and Development Institute, Agency for Defense Development)
Shin, Jihwan (The 6th Research and Development Institute, Agency for Defense Development)
Kwon, Laeun (The 6th Research and Development Institute, Agency for Defense Development)
Lee, Kurnchul (The 6th Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.17, no.6, 2014 , pp. 861-867 More about this Journal
Abstract
In the present study, the flow around a circular cylinder at $Re=3.6{\time}10^6$ is numerically simulated using URANS approach. The objective of this study is to evaluate the turbulence models(Realizable k-${\varepsilon}$, RNG k-${\varepsilon}$) through the prediction of the unsteady flow characteristics around the cylinder. The time-averaged drag coefficients and vortex shedding phenomenon in the wake region are compared to available experimental data and other numerical results. The simulation with Realizable k-${\varepsilon}$ model is found to be more dissipative due to large eddy viscosity predicted in the wake region while the simulation with RNG k-${\varepsilon}$ model predicts a complex vortex shedding phenomenon with more coherent structures realistically.
Keywords
Turbulence Model; Vortex Shedding; Eddy Viscosity; Coherent Structure;
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