Abstract
In order to develop a new mixing procedure, we conduct DNS (direct numerical simulation) of vector control for free jet. The nozzle is periodically oscillated by vector control. From view of instaneous vortex structures, it is found that the structures are modulate, compared with the case of the free jet. In contours of ensemble averaged streamwise velocity and turbulence kinetic energy, the jet diffuses largely in the oscillating direction. While, the jet shrinks in the perpendicular to this direction. As a result, the vector control can be expected for the improvement of mixing efficiency.
