Prediction of turbulent flows behind bluff bodies by using an Algebraic-Stress Model

A numerical study is reported on an external flow over a disk and an internal flow past a cone in which there are regions of reverse currents created by these bluff bodies. The computations are made by using the Algebraic-Stress Model (ASM). The computed results are compared with experimental data in the literature. The results are also compared with computations made with the k-epsilon model. It is shown that the computed velocity and Reynolds-stress profiles obtained using the ASM agree with the experimental data. It is also shown that the agreement is better than by using the k-epsilon model. The behavior of turbulent kinetic energy and the coefficient of the turbulent viscosity is investigated at different locations in the flow field behind bodies. Furthermore, the profiles of the ratio of the generation to energy dissipation are examined in this flow region.