Fluid transport via pneumatically actuated waves on a ciliated wall
Fluid transport via pneumatically actuated waves on a ciliated wall
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DOI：
10.1088/0960-1317/25/12/125009
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发表时间：
2015-10
影响因子：
2.3
通讯作者：
A. Rockenbach;V. Mikulich;C. Brücker;U. Schnakenberg
中科院分区：
文献类型：
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作者：
A. Rockenbach;V. Mikulich;C. Brücker;U. Schnakenberg
为了主动操纵流体，开发了气动微膜装置，以在靠近壁的液体层中产生定向横向流体输送。仿生方法基于纤毛型阵列的原理，通过行波激活产生平均流量。成排的长瓣模仿栉水母的梳子排，沿着一排空腔偏离中心放置。每个空腔都覆盖有支撑皮瓣的柔性膜。通过向膜下方的空腔施加明确的压力分布，使顶部带有瓣片的膜发生偏转，从而可以为每个瓣产生单独的节拍。在行波条件下进行了流动可视化实验。结果显示平均速度分布类似于壁射流。伴随着流体保留时间增加的混合效应发生在膜表面附近。
To manipulate fluids actively a pneumatically actuated micro membrane device is developed to generate a directed transversal fluid transport in a liquid layer next to the wall. The biomimetic approach is based on the principle of cilia-type arrays that generate a mean flow by travelling wave activation. Rows of long flaps, which mimic the comb row of a ctenophore, are positioned off-centre along a row of cavities. Each cavity is covered by a flexible membrane that supports the flaps. The membranes with the flaps on top are deflected by applying a well-defined pressure profile to the cavities under the membranes such that an individual beat can be generated for each flap. Flow visualization experiments were carried out under the conditions of travelling waves. The results show a mean velocity profile that resembles that of a wall-jet. Mixing effects with increased retention times of the fluid occur in the vicinity of the membrane surfaces.