Numerical investigation of the near-field flow-structures produced by a pitched and skewed vortex generating jet.
MetadataShow full item record
A large-eddy simulation of a velocity-ratio (VR = 1:0), pitched and skewed vortex generating jet issuing into a turbulent boundary layer (Red = 2000) is presented. As the jet issues from the orifice, an asymmetrical counter-rotating vortex pair is produced, consisting of a strong primary vortex and a weaker secondary vortex. The secondary vortex quickly dissipates to leave the primary vortex, which persists farther downstream. The primary vortex replaces the near-wall region with higher momentum fluid, and is shown to be associated with improved skin friction downstream of the jet. This increase in skin friction has been previously shown to be associated with improved resistance to boundary-layer separation.
Showing items related by title, author, creator and subject.
Prakash, Baranivignesh; Bhatelia, T.; Wadnerakr, D.; Shah, M.; Pareek, V.; Utikar, R. (2018)The present study investigated the effect of impeller speed and vortex ingestion on vortex shape, gas holdup, and bubble size distribution in an unbaffled stirred tank using optical probe measurements. Further, the ability ...
Granular vortices: Identification, characterization and conditions for the localization of deformationTordesillas, A.; Pucilowski, S.; Lin, Qun; Peters, J.; Behringer, R. (2016)We relate the micromechanics of vortex evolution to that of force chain buckling and, on this basis, formulate the conditions for strain localization in a continuum model of dense granular media. Using the traditional ...
Boswell, Brian (2008)Traditional liquid coolants used in metal machining are known to contain chemical carcinogens that could present serious health risks for machine operators and have inherent waste disposal concerns on the environment. In ...