Wavy Whiskers in Wakes: Explaining the Trail-Tracking Capabilities of Whisker Arrays on Seal Muzzles,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Wavy Whiskers in Wakes: Explaining the Trail-Tracking Capabilities of Whisker Arrays on Seal Muzzles
Advanced Science ( IF 14.3 ) Pub Date : 2022-11-20 , DOI: 10.1002/advs.202203062
Xingwen Zheng _{1,

2} , Amar M Kamat ₂ , Ming Cao ₁ , Ajay Giri Prakash Kottapalli _{2,

3}

Affiliation

Seals can detect prey up to 180 m away using only their flow-sensing whiskers. The unique undulating morphology of Phocid seal whiskers reduces vortex-induced vibrations (VIVs), rendering seals highly sensitive to biologically relevant flow stimuli. In this work, digital models of harbor and grey seal whiskers are extracted using 3D scanning and a mathematical framework that accurately recreates their undulating geometry is proposed. Through fluid–structure interaction studies and experimental investigations involving a whisker array mounted on 3D-printed microelectromechanical systems sensors, the vibration characteristics of the whisker array and the interaction between neighboring whiskers in steady flows and fish-wake-like vortices are explained for the first time. Results reveal that the downstream vortices intensity and resulting VIVs are consistently lower for grey than harbor seal whiskers and a smooth cylinder, suggesting that the grey seal whisker geometry can be an ideal template for the biomimetic design of VIV-resistant underwater structures. In addition, neighboring whiskers in an array influence one another by resulting in greater flow vorticity fluctuation and distribution area, thus causing increased vibrations than an isolated whisker, which indicates the possibility of a signal-strengthening effect in whisker arrays.

中文翻译：

尾迹中的波浪胡须：解释海豹口吻上胡须阵列的追踪能力

海豹仅使用它们的流量感应胡须就可以检测到 180 米以外的猎物。Phocid 海豹晶须独特的起伏形态减少了涡激振动 (VIV)，使海豹对生物相关的流动刺激高度敏感。在这项工作中，使用 3D 扫描提取海豹和灰海豹胡须的数字模型，并提出了一个精确重建其起伏几何形状的数学框架。通过涉及安装在 3D 打印微机电系统传感器上的晶须阵列的流体-结构相互作用研究和实验研究，首次解释了晶须阵列的振动特性以及稳定流动和鱼尾状涡流中相邻晶须之间的相互作用时间。结果表明，灰色的下游涡流强度和由此产生的 VIV 始终低于斑海豹须和光滑圆柱体，这表明灰色海豹须的几何形状可以成为抗 VIV 水下结构仿生设计的理想模板。此外，阵列中相邻的晶须通过导致更大的流动涡度波动和分布区域而相互影响，从而导致比孤立的晶须增加的振动，这表明晶须阵列中信号增强效应的可能性。

更新日期：2022-11-20

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南