FINITE VOLUME. COMPUTATION OF INCOMPRESSIBLE TURBULENT FLOWS IN GENERAL CO-ORDINATES ON STAGGERED GRIDS

摘要

A brief review of the computation of incompressible turbulent flow in complex geometries is given A 2D linite volume method for the calculation of turbultent flow in general curvilinear co-ordinates is described. This method is based on a staggered grid arrangement and the contravariant flux components are chosen as primitive variables. Turbulence is modelled either by the standard kk-e model or by a k-e model based on RNG theory. Convection is approximated with central differences for the mean flow equantities and a TVD-type MUSCL scheme for the turbulence equations. The sensitivity of the method to the grid properties is investigated. An application of this method to a complex turbulent flow is presented. The results of computations are compared with experimental data and other numerical solutions and are found to be satisfactory.