Srinivas, KK and Diwan, SS and Ramesh, ON (2022) Wave Packet Dispersion in Inflectional and Non-inflectional Flows. [Book Chapter]
Full text not available from this repository.Abstract
We study the linear spatio-temporal stability characteristics of inflectional and non-inflectional parallel flows and towards this consider separated boundary layer flow (SBLF), plane Couette-Poiseuille flow (CPF) and Falkner Skan flow with Favourable Pressure Gradient (FSFPG) with the boundary moving opposite to bulk fluid motion. We compute the temporal growth rate (�o , i ) at the saddle point of the dispersion relation in a frame of reference moving in the streamwise direction at a constant speed V, and locate the leading and trailing edge velocities (VLE, VTE ) of the unstable wave packet for each of these flows. We show that their difference � V= VLE- VTE, taken as a measure of dispersion of the unstable wave packet and its dependence on Reynolds number (Re) show important features that differentiate spatio-temporal instability dynamics of inflectional and non-inflectional flows. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
| Item Type: | Book Chapter |
|---|---|
| Publication: | IUTAM Bookseries |
| Series.: | IUTAM Bookseries |
| Publisher: | Springer Science and Business Media B.V. |
| Additional Information: | The copyright for this article belongs to Springer Science and Business Media B.V. |
| Keywords: | Boundary layer flow; Boundary layers; Dispersion (waves); Growth rate; Reynolds number; Wave packets, Dispersion relations; Favourable pressure gradients; Frame of reference; Important features; Plane Couette-Poiseuille flow; Separated boundary layers; Spatio-temporal instability; Streamwise directions, Parallel flow |
| Department/Centre: | Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) |
| Date Deposited: | 24 Sep 2021 07:54 |
| Last Modified: | 24 Sep 2021 07:54 |
| URI: | http://eprints.iisc.ac.in/id/eprint/69711 |
Actions (login required)
 |
View Item |
