Flow Analyses around Transient Jet through a PIV Technique

Abstract

A typical viscous transient flow around an impinging water jet is carefully observed, when the jet just starts to flow and begins to impinge upon a horizontal wall vertically, by means of a particle-image-velocimetry so-called PIV. The jet is upwardly ejected from a 1.64mm-dia nozzle towards the horizontal wall. The transient flow aspects are highspeed-photographically observed by means of the double-pulse YAG-laser of 200ns in exposure time. Clearly, the transient flow aspects are quite different from the steady counterpart.