Efficient Solution of Turbulent Incompressible Separated Flows

  • Vittorio Michelassi
  • Francesco Martelli
Part of the Notes on Numerical Fluid Mechanics (NNFM) book series (NNFM, volume 29)


A computational method for incompressible separated flows based on two-dimensional approximate factorization is presented. Turbulence effects are accounted for by low-Reynolds number forms of the k-ε model. Mass conservation is enforced by the artificial compressibility method. Decoupling and coupling of the equations of motions with the turbulence model equations are investigated. Testing of the coupled solver showed no improvement in convergence or accuracy in comparison to the classical decoupled approach. The solver was then applied to several large-recirculation flows using a modified version of the low-Reynolds-number form of the k-ε model proposed by Chien and a two-layer version of the k-e model introduced by Rodi. Both versions gave fast convergence rates and good agreement with experiments.


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Copyright information

© Springer Fachmedien Wiesbaden 1990

Authors and Affiliations

  • Vittorio Michelassi
    • 1
  • Francesco Martelli
    • 1
  1. 1.Energy Engineering DepartmentUniversity of FlorenceItaly

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