We performed direct numerical simulations (DNS) of the turbulent annular jet flow for the Reynolds number Re = 8900 with three different values of the inner-to-outer diameter ratio (a = d / D = 0.3, 0.5, 0.7). The time-averaged velocity fields and fluctuations were analyzed. The low aspect ratio results in the shortest recirculation zone while for high a value the stagnation point features high level of turbulent kinetic energy. This is the evidence of the accompanying low-frequency oscillations of the recirculation zone.
|Number of pages||6|
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 28 Nov 2018|
|Event||34th Siberian Thermophysical Seminar Dedicated to the 85th Anniversary of Academician A. K. Rebrov, STS 2018 - Novosibirsk, Russian Federation|
Duration: 27 Aug 2018 → 30 Aug 2018