Abstract
Periodic jet forcing presents interesting opportunities for jet mixing for a variety of applications. In this work, simulations are performed to study the effect of high-amplitude forcing on laminar jets (Re = 100) with net mass flux. For the cases presented in this work, we look at the effects of simulating the internal nozzle and show that assumptions about the nozzle flow have a large effect on the downstream flow evolution. Studies are performed on strongly forced axisymmetric jets in two geometries: 1) jets issuing perpendicularly from a flat wall and 2) jets issuing from a straight tube (nozzle). The amplitude and frequency of the forcing function are varied to study vortex creation and subsequent evolution downstream of the jet. For example, cases in which the peak jet velocity is three to four times the mean jet velocity are examined. The near-nozzle region was of particular interest due to the strong mixing processes occurring there. We discuss how nozzle flow processes modify the creation of downstream large-scale vortical structures. An interesting result of this work is that the strongest forcing cases possess some striking similarities to synthetic jets. For such cases, the flow reversal processes at the jet exit plane are investigated.
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.
