A turbulent circular jet with variable density caused by the mixing of air with gases of different densities (air, helium, and carbon dioxide) is studied. The Reynolds number is fixed for all cases: Re = 5300. Using proper orthogonal decomposition and direct numerical simulation data, a comparative analysis of the three gases under consideration is carried out. It is shown that with a decrease in the ambient gas density, the frequency of coherent structures formation drops, and the number of proper orthogonal decomposition (POD) modes necessary for constructing a low-dimensional flow model decreases.
Предметные области OECD FOS+WOS
- 1.07 ПРОЧИЕ ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ
- 1.01 МАТЕМАТИКА
- 2.03 МЕХАНИКА И МАШИНОСТРОЕНИЕ
- 2.03.DT ТЕРМОДИНАМИКА
- 2.03.PU МЕХАНИКА