N.V.Rozumnyuk Instantaneous and averaged characteristics of viscous flow past a rectangular cavity |
Applied hydromechanics, Vol. 9 (81) ¹ 4, (2007) |
| Direct numerical simulations are used to study the characteristics of viscous flow within two-dimensional open cavities and its influence on the boundary layer downstream, in dependence on the upstream boundary layer momentum thickness, Reynolds number, and the cavity length-to-depth ratio. The results show presence of steady large-scale circulating flow within the cavities at lower Reynolds number (<10000); appearance of periodic oscillations of the flow due to the shear layer instability in the cavity mouth and intensification of flow in the entire cavity at in creasing Reynolds number that essentially influences the boundary layer downstream. The qualitative difference between the instantaneous and averaged in time flow patterns at Reb > 20000 has been emphasized. |
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| TEXT LANGUAGE: Russian |