SIMULATIONS OF TURBULENT ISOTHERMAL FREE JETS

In present work fluid-dynamic behavior of plan isotherm and axisymmetric three-dimensional turbulent air jets in free field has been developed. The study has been led by means of a fluid-dynamic numeric analysis (CFD) with particular attention to discretization type and boundary conditions influence on mathematical solution. Velocity variation along jet axis and on transversal sections has been determined; then results have been compared with data available in literature. Fluid-dynamic jets behavior has been studied with particular attention on entrainment and mutual influence among two or more jets, in accordance with their distance, with the aim of giving useful information about velocity field for ventilation plants project and construction. Mathematical model defined for two-dimensional and axisymmetric three-dimensional problems led us to good results; so in next works the methodology will be extended to three-dimensional phenomena.