Partially-averaged Navier-Stokes method for turbulent flows: K- model implementation Conference Paper uri icon

abstract

  • Partially-averaged Navier-Stokes (PANS) method is a bridging model purported to perform variable resolution simulations of any degree of resolution from Reynolds-averaged Navier-Stokes (RANS) to direct numerical simulation (DNS) by varying the filter width. The parameters which determine the filter width of the computations are determined by specifying the ratios of unresolved-to-total turbulent kinetic energy and unresolved-to-total dissipation rate. In the present study, the closure for the unresolved flow variables is obtained using the RANS k- paradigm. The proposed PANS model is evaluated by performing two complex flow simulations. First, turbulent flow past a circular cylinder at ReD = 1.4105 is simulated and the predicted mean statistics and integral flow quantities are compared with available numerical and experimental data and it is observed that the model performs fairly accurately in predicting the mean flow statistics and the accuracy improves as the filter width is decreased. Second, turbulent flow past a backward facing step at ReH = 3.75104 is analyzed using the PANS k- model. The predicted flow statistics show better agreement with the compared experimental data than their RANS counterpart.

published proceedings

  • Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting

author list (cited authors)

  • Lakshmipathy, S., & Girimaji, S. S.

complete list of authors

  • Lakshmipathy, S||Girimaji, SS

publication date

  • December 2006