Second Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP2
INFLUENCE OF THE BOUNDARY CONDITIONS ON THE DIRECT NUMERICAL SIMULATION OF A PLANE TURBULENT JET
pages 401-406
DOI: 10.1615/TSFP2.670
摘要
A plane turbulent jet at Re=4000 is investigated using Direct Numerical Simulation. The influence of the inflow conditions is pointed out by using an inflow generator (Lee et al., 1992, Lund et al., 1998) which reproduces the turbulence spectra as well as first and second order statistics from a given experiment. The effects of different mean velocity profiles, fluctuation levels and turbulence spectra on the jet development are investigated. A strong dependence of the length of the potential core and the jet spreading rate on the artificial inflow velocity profile has been found.