Author(s)

Z. Rek & L. Skerget

Abstract

This paper deals with the numerical simulation of the turbulent fluid flow in 2D using the vorticity-velocity formulation. A time averaged form of the Navier-Stokes equations is employed throughout the Reynolds decom- position of the instantaneous value of each variable. Turbulent stress terms are interpreted in the Boussinesq manner with Prandtl's mixing length hy- pothesis. One equation model of turbulence is used where velocity scale is dependent on turbulent kinetic energy (&j, while length scale is defined through algebraic equation. In one equation model, an additional transport equation arises for k and it is coupled with transport equation for vorticity w. These two equations together with kinematic equation form a strong nonlinear system of equations. Governing equations The fluid flow of engineering interest is in the majority of cases a turbulent one. T

Keywords