Air-flow sensitive hairs: boundary layers in oscillatory flows around arthropod appendages

Share/Save/Bookmark

Steinmann, T. and Casas, J. and Krijnen, G.J.M. and Dangles, O. (2006) Air-flow sensitive hairs: boundary layers in oscillatory flows around arthropod appendages. The Journal of Experimental Biology, 209 . pp. 4398-4408. ISSN 0022-0949

[img]
Preview
PDF
1251Kb
Abstract:The aim of this work is to characterize the boundary layer over small appendages in insects in longitudinal and transverse oscillatory flows. The problem of immediate interest is the early warning system in crickets perceiving flying predators using air-flow-sensitive hairs on cerci, two long appendages at their rear. We studied both types of oscillatory flows around small cylinders using stroboscopic micro-particle image velocimetry as a function of flow velocity and frequency. Theoretical predictions are well fulfilled for both longitudinal and transverse flows. Transverse flow leads to higher velocities than longitudinal flow in the boundary layer over a large range of angles between flow and cylinder. The strong spatial heterogeneity of flow velocities around filiform-shaped appendages is a rich source of information for different flow-sensing animals. Our results suggest that crickets could perceive the direction of incoming danger by having air-flow-sensitive hairs positioned around their entire cerci. Implications for biomimetic flow-sensing MEMS are also presented.
Item Type:Article
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/66213
Official URL:http://dx.doi.org/10.1242/jeb.02506
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 238667