A NUMERICAL-METHOD FOR RECIRCULATING-FLOWS ON GENERALIZED COORDINATES- APPLICATION IN ENVIRONMENTAL FLOWS

This paper presents a numerical method for the solution of the time-av eraged Navier-Stokes equations, written in their contravariant strong conservation form, in a generalized nonorthogonal coordinate system. A coordinate transformation is used, and the solution domain is transfo rmed into a unit rectangle, where the transformed governing equations are solved via a finite volume technique. Various tests prove the effi ciency and flexibility of the developed computer code; then the method is applied to two practical applications concerning the calculation o f the flow and concentration fields over two-two-dimensional (2-D) hil ls, with and without flow reversal.