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On two-dimensional temporal modes in spatially evolving open flows: the flat-plate boundary layer
| Content Provider | Scilit |
|---|---|
| Author | Ehrenstein, Uwe Gallaire, François |
| Copyright Year | 2005 |
| Description | Temporal linear stability modes depending on two space directions are computed for a two-dimensional boundary-layer flow along a flat plate. The spatial structure of each individual temporally stable mode is shown to be reminiscent of the spatial exponential growth of perturbations along the flat plate, as predicted by local analyses. It is shown using an optimal temporal growth analysis, that an appropriate superposition of a moderate number of temporal modes gives rise to a spatially localized wave packet, starting at inflow and exhibiting transient temporal growth when evolving downstream along the plate. This wave packet is in qualitative agreement with the convectively unstable disturbance observed when solving the Navier–Stokes equations for an equivalent initial condition. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2259B8932517BA5494991341C4C24DE8/S0022112005005112a.pdf/div-class-title-on-two-dimensional-temporal-modes-in-spatially-evolving-open-flows-the-flat-plate-boundary-layer-div.pdf |
| Ending Page | 218 |
| Page Count | 10 |
| Starting Page | 209 |
| ISSN | 00221120 |
| e-ISSN | 14697645 |
| DOI | 10.1017/s0022112005005112 |
| Journal | Journal of Fluid Mechanics |
| Volume Number | 536 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2005-07-26 |
| Access Restriction | Open |
| Subject Keyword | Journal of Fluid Mechanics Atomic, Molecular and Chemical Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Mechanics of Materials Condensed Matter Physics Mechanical Engineering |
