Advanced vorticity measurements on complex flows
Sensoren, Geräte und Komponenten
3-component vorticity probing, spherical micro mirrors, swirling motion in complex flows, strophometry
Scientists from the Max Planck Institute for Dynamics and Self-Organization have developed a novel method for direct vorticity measurements in complex flows. Here, spherical micro-mirror capsules are utilized to detect directly the swirling motion of fluid elements. Such micro-mirrors capsules can be produced easily and cost effective with a recently developed, patented Max Planck technology (MI 0705-4830-BC-JK).
As illustrated in Figure 1, a novel optical setup with four cameras combines Lagrangian particle tracking with vorticity optical probing. By combining the information of all cameras, the translational motion and spin (vorticity) of a particle can be measured in parallel with hitherto unreached resolution.
Due to its outstandingly high spatial resolution, this technique is powerful tool for studying turbulence, shear flows, boundary layers and other vortex dominated flows.
Novel method for three component vorticity measurement features
- high spatial resolution, increased by one order of magnitude compared to conventional techniques.
- direct three component vorticity measurement with high accuracy.
- acquisition of full information on particle rotation and translation.
- larger sample volume compared to conventional vorticity-probing techniques.
- EP priority patent pending
- H. Wu, H. Xu, E. Bodenschatz, “Three component vorticity measurement using spherical particles with embedded reflecting mirror flakes”, submitted
- Ref.-No.: 0705-4770-BC (477,5 KiB)
Dr. Bernd Ctortecka, M. Phil.
Telefon: 089 / 29 09 19-20