G.O.Voropayev, N.V.Rozumnyuk Numerical modeling of the viscous flow over a surface with cavity |
Applied hydromechanics, Vol. 6 (78) ¹ 4, (2004) |
| The flow of viscous incompressible liquid past a semicircular cavity in a flat surface has been investigated, on the basis of numerical solution to unstable Navier-Stokes equations. The structure of flow inside the cavity and its influence on the characteristics of flow over the surface has been analyzed. There exist different regimes of flow (stable and quasiperiodic) in dependence on the Reynolds number. Spectrum characteristics of oscillations at unstable behavior of flow have been investigated. A correlation of nondimensionalized frequencies with the frequency of instability of the shear layer along cavity mouth has been revealed, at the initial stage of unstable regime, as well as appearance and development of oscillations with lower frequencies, at increased Reynolds number. |
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| TEXT LANGUAGE: Russian |