Abstract
Particle image velocimetry (PIV) experiments were carried out on a round jet in a uniform counterflow. The complex dynamics of this flow has so far hindered its understanding, and PIV appears to be a promising investigation method to help fill this gap. In fact PIV allows the dynamics of single vorticity structures to be followed, at least within the limits of its spatial and temporal resolution. In particular, the combination of PIV and proper orthogonal decomposition (POD) analysis showed that it is possible to isolate a few typical patterns out of the apparently chaotic fluctuations of the jet. A POD analysis at high velocity ratios was performed to investigate the fluctuations typical of the far field of the jet, while one at the critical velocity ratio of 1.3 delivered further information on the transition between the stable and the unstable flow condition.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
