Computation of turbulent separated nozzle flow by a lag model

Qing Xiao, Her-Mann Tsai, Feng Liu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The capability of the lag model for shock-induced separated flows in supersonic nozzles was discussed. The Reynold-averaged Navier-Stokes equations and the baseline Wilcox k-ω turbulence model were used to predict the equilibrium eddy viscosity. It was found that the lag model introduced history effect and relaxation of the eddy viscosity over the equilibrium values predicted by the baseline model. Analysis shows that the inclusion of the lag model significantly improves the results where there is strong shock-induced separation.
Original languageEnglish
Pages (from-to)368-371
Number of pages4
JournalJournal of Propulsion and Power
Issue number2
Publication statusPublished - 31 Mar 2005


  • diffusion
  • mathematical models
  • Navier Stokes equations
  • nozzles
  • pressure distribution
  • relaxation processes
  • Reynolds number
  • supersonic aerodynamics
  • turbulence
  • unsteady flow
  • viscosity
  • Eddy viscosity

Cite this