Oscillation of the velvet worm slime jet by passive hydrodynamic instability
Đã lưu trong:
| Nhiều tác giả: | , , , , , |
|---|---|
| Định dạng: | artículo |
| Ngày xuất bản: | 2015 |
| Miêu tả: | The rapid squirt of a proteinaceous slime jet endows velvet worms (Onychophora) with a unique mechanism for defence from predators and for capturing prey by entangling them in a disordered web that immobilizes their target. However, to date, neither qualitative nor quantitative descriptions have been provided for this unique adaptation. Here we investigate the fast oscillatory motion of the oral papillae and the exiting liquid jet that oscillates with frequencies f~30–60 Hz. Using anatomical images, high-speed videography, theoretical analysis and a physical simulacrum, we show that this fast oscillatory motion is the result of an elastohydrodynamic instability driven by the interplay between the elasticity of oral papillae and the fast unsteady flow during squirting. Our results demonstrate how passive strategies can be cleverly harnessed by organisms, while suggesting future oscillating microfluidic devices, as well as novel ways for micro and nanofibre production using bioinspired strategies. |
| Quốc gia: | Repositorio UNA |
| Tổ chức giáo dục: | Universidad Nacional de Costa Rica |
| Repositorio: | Repositorio UNA |
| Ngôn ngữ: | Inglés |
| OAI Identifier: | oai:null:11056/18824 |
| Truy cập trực tuyến: | http://hdl.handle.net/11056/18824 |
| Từ khóa: | DEPREDACIÓN PHYLUM ONYCHOPHORA ONICÓFOROS GUSANO DE TERCIOPELO DEPREDATION JET |