Paper Title:
Effect of Turbulence Model on Simulation of Trailing Vortex around Ahmed Body
  Abstract

The Realizable k-ε Reynolds averaged Navior-Stokes (RANS) turbulence models and SST k-w detached eddy simulation (DES) models are investigated for simulation of external flow and trailing vortex around Ahmed body. The 3-D N-S equations are solved with central finite volume scheme and half-implicit SIMPLE method. The time average parameters of the DES results, such as the pressure, velocity field and drag coefficient Cd, are verified by comparing with RANS and experiment data. The vortex structures of vertical, horizontal plane and cross-section, along with the turbulent kinetic energy of tail vortex are studied in details. The results show that for time averaged parameters both models can get reasonable results, while for capturing the instant flow structure, DES shows advantage over RANS model.

  Info
Periodical
Edited by
Zhou Mark
Pages
1905-1910
DOI
10.4028/www.scientific.net/AMM.52-54.1905
Citation
X. L. Yang, K. Y. Hu, T. P. Lin, J. Yang, "Effect of Turbulence Model on Simulation of Trailing Vortex around Ahmed Body", Applied Mechanics and Materials, Vols. 52-54, pp. 1905-1910, 2011
Online since
March 2011
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