NUMERICAL PREDICTION OF TURBULENT-FLOW AROUND A 3-DIMENSIONAL SURFACE-MOUNTED OBSTACLE

A numerical model is presented for the computation of general three-di mensional incompressible turbulent flow. The turbulence is modelled by use of a standard two-equation (k - epsilon) model. The numerical for mulation is a Galerkin finite element method, and a fractional step al gorithm is applied for the solution of the advection-diffusion equatio ns. The pressure is computed from a derived Poisson equation, and the solution of this equation system is performed by the use of an efficie nt incomplete Cholesky conjugate gradient (ICCG) algorithm. Computatio ns are performed for flow around a three-dimensional surface-mounted c ube, and predictions are compared with available measurements The pred icted results show encouraging agreement with the experiments.