Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Comparative study of flow over a circular disk using RANS turbulence models

원형 디스크 주위 유동에 대한 RANS 유동해석 비교 연구

  • Ryu, Nam Kyu (Department of Mechanical Engineeering, Chungnam National University) ;
  • Kim, Byoung Jae (Department of Mechanical Engineeering, Chungnam National University)
  • Received : 2021.03.19
  • Accepted : 2021.04.21
  • Published : 2021.04.30
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Abstract

For a flow normal to a circular disk, the flow separation occurs from the edge of the disk and the flow recirculation zone exists behind the disk. Many existing studies conducted simulations of flow normal to a circular disk under low Reynolds numbers. Some studies performed LES or DES simulations under high Reynolds numbers. However, comparative study for different RANS models for high Reynolds numbers is very limited. This study presents numerical simulations of a flow normal to a circular disk using Realizable k-ε model and SST k-ω model. The recirculation bubble length and drag coefficient were compared with the experimental data. The SST k-ω model showed the excellent predictions for the recirculation bubble length and drag coefficient.

Keywords

Acknowledgement

이 논문은 2020년도 정부(과학기술정보통신부)의 재원으로 한국연구재단터의 지원을 받아 수행된 연구임(No.2020R1A2C1010460)

References

  1. Marshall, D. and Stanton, T.E. (1931) On the eddy system in the wake of flat circular plates in three dimensional flow. Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character 130 (813), 295-301.
  2. Roberts, J. (1973) Coherence measurements in an axisymmetric wake. AIAA Journal 11 (11), 1569-1571. https://doi.org/10.2514/3.50632
  3. Berger, E. et al. (1990) Coherent vortex structures in thewake of a sphere and a circular disk at rest and under forced vibrations. Journal of Fluids and Structures 4 (3), 231-257. https://doi.org/10.1016/S0889-9746(05)80014-3
  4. Shenoy, A. and Kleinstreuer, C. (2008) Flow over a thin circular disk at low to moderate Reynolds numbers. Journal of Fluid Mechanics 605, 253. https://doi.org/10.1017/S0022112008001626
  5. Meliga, P. et al. (2009) Global mode interaction and pattern selection in the wake of a disk: a weakly nonlinear expansion. Journal of Fluid Mechanics 633, 159. https://doi.org/10.1017/S0022112009007290
  6. Fabre, D. et al. (2008) Bifurcations and symmetry breaking in the wake of axisymmetric bodies. Physics of Fluids 20 (5), 051702. https://doi.org/10.1063/1.2909609
  7. Chrust, M. et al. (2010) Parametric study of the transition in the wake of oblate spheroids and flat cylinders. Journal of fluid mechanics 665, 199. https://doi.org/10.1017/S0022112010004878
  8. Yang, J. et al. (2015) Low-frequency characteristics in the wake of a circular disk. Physics of Fluids 27 (6), 064101. https://doi.org/10.1063/1.4922109
  9. Tian, X. et al. (2016) Large-eddy simulations of flow normal to a circular disk at Re= 1.5 × 105. Computers & Fluids 140, 422-434. https://doi.org/10.1016/j.compfluid.2016.10.023
  10. Zhong, H.-J. and Lee, C.-B. (2012) The wake of falling disks at low Reynolds numbers. Acta Mechanica Sinica 28 (2), 367-371. https://doi.org/10.1007/s10409-012-0036-4
  11. Breuer, M. et al. (2003) Comparison of DES, RANS and LES for the separated flow around a flat plate at high incidence. International journal for numerical methods in fluids 41 (4), 357-388. https://doi.org/10.1002/fld.445
  12. Roohi, E. et al. (2016) Simulation of threedimensional cavitation behind a disk using various turbulence and mass transfer models. Applied Mathematical Modelling 40 (1), 542-564. https://doi.org/10.1016/j.apm.2015.06.002
  13. Roos, F.W. and Willmarth, W.W. (1971) Some experimental results on sphere and disk drag. AIAA journal 9 (2), 285-291. https://doi.org/10.2514/3.6164
  14. Shih, T. et al. (1994) A new ke eddy viscosity model for high Reynolds number turbulent flows-Model development and validation. NASA TM 106721.
  15. Menter, F.R. (1994) Two-equation eddy-viscosity turbulence models for engineering applications. AIAA journal 32 (8), 1598-1605. https://doi.org/10.2514/3.12149
  16. Fluent, A. (2011) Ansys fluent theory guide. ANSYS Inc., USA 15317, 724-746.