Numerical study of inflow conditions on an axisymmetric turbulent jet

We intend to solve equations governing turbulent axisymmetric vertical isotherm and non-isotherm jets. A finite difference method is used successfully to solve a system of a coupled partial differential equations. The intention is focused to the analysis of the validity, in the three jet regions, of turbulence models (the k-epsilon and the k-epsilon-T' exp 2 models). The algebraic model k-epsilon-T' exp 2 is then adopted to determine the effect of injection conditions on flow parameters. The numerical results show the importance of the inflow conditions only in the jet region. In the steady flow region the inflow conditions do not affect anymore the flow. Moreover, the numerical results show that both turbulence models are valid and give identical results in the region of the fully developed regime in forced convection. However, in mixed convection, results are very different even in the self-similar zone. The algebraic model k-epsilon-T' exp 2 proved out to be more efficient in describing axisymmetric flow characteristics.