Abstract
This report presents experimental results on the propagation of a turbulent front induced by an oscillating grid starting from rest. The study is divided into two parts. The purpose of a first investigation is to validate vorticity measurements for the detection of the turbulent/non-turbulent interface for oscillating grid turbulence. This is done using particle image velocimetry (PIV) and resolving the larger scales of the flow. The results of these measurements show, that level-based detection of a turbulent front is well applicable to an unsteady flow, such as grid turbulence advancing into a fluid at rest. Secondly, 3D scanning particle tracking velocimetry (3D-SPTV) was used to yield Lagrangian flow information at the turbulent/non-turbulent interface with focus on the smaller scales.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 125-128 |
| Number of pages | 4 |
| Journal | Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer |
| Volume | 2006-September |
| DOIs | |
| State | Published - 2006 |
| Externally published | Yes |
| Event | 2006 International Symposium On Turbulence, Heat and Mass Transfer, THMT 2006 - Dubrovnik, Croatia Duration: Sep 25 2006 → Sep 29 2006 |
Bibliographical note
Publisher Copyright:© 2006 Begell House, Inc.