Vortex-accelerated secondary baroclinic vorticity deposition and late-intermediate time dynamics of a two-dimensional Richtmyer–Meshkov interface
| Autor: | Gaozhu Peng, Norman J. Zabusky, Shuang Zhang |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Mechanical Engineering Baroclinity Computational Mechanics Particle-laden flows Mechanics Vorticity Condensed Matter Physics Vortex Physics::Fluid Dynamics symbols.namesake Circulation (fluid dynamics) Classical mechanics Mach number Mechanics of Materials Inviscid flow Vortex sheet symbols |
| Zdroj: | Physics of Fluids. 15:3730-3744 |
| ISSN: | 1089-7666 1070-6631 |
| Popis: | We study the vortex-accelerated secondary baroclinic vorticity deposition (VAVD) at late-intermediate times, and dynamics of sinusoidal single-mode Richtmyer–Meshkov interfaces in two dimensions. Euler simulations using a piecewise parabolic method are conducted for three post-shock Atwood numbers (A*), 0.2, 0.635, and 0.9, with Mach number (M) of 1.3. We initialize the sinusoidal interface with a slightly “diffuse” or small-but-finite thickness interfacial transition layer to facilitate comparison with experiment and avoid ill-posed phenomena associated with evolutions of an inviscid vortex sheet. The thickness of the interface is chosen so that there are no secondary structures along the interface prior to the multivalue time tM, which is defined as the time when the extracted medial axis of an interfacial layer first becomes multivalued. For an interval of 11tM beyond tM, the simulations reveal nearly monotonic strong growth of both positive and negative baroclinic circulation in a vortex bilayer patte... |
| Databáze: | OpenAIRE |
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