Transition in swimming direction in a model self-propelled inertial swimmer
Transition in swimming direction in a model self-propelled inertial swimmer
复制标题
DOI：
10.1103/physrevfluids.4.021101
复制
发表时间：
2018-01
影响因子：
2.7
通讯作者：
Thomas Dombrowski;Shannon K. Jones;G. Katsikis;A. Bhalla;Boyce E. Griffith;D. Klotsa
中科院分区：
文献类型：
--
作者：
Thomas Dombrowski;Shannon K. Jones;G. Katsikis;A. Bhalla;Boyce E. Griffith;D. Klotsa
作者：托马斯·多布罗夫斯基；琼斯，香农 K；卡齐基斯，乔治斯；巴拉，阿姆尼特·帕尔·辛格；格里菲斯，博伊斯E；达芙妮·克洛萨 |摘要：我们提出了一种中间雷诺数 ($Re$) 的互易自推进模型游泳者。我们的游泳器由两个不等的球体组成，它们反相振荡，产生非线性稳定流 (SS)。我们通过计算表明，SS 流使游泳者能够推动自身，并且随着 $Re$ 的增加而改变方向。我们通过折叠关键 $Re$ 上的数据来量化游泳方向的转变，并表明游泳方向的转变对应于 SS 流的逆转。根据我们的发现，我们认为 SS 可能是中间 $Re$ 运动的重要物理机制。
Author(s): Dombrowski, Thomas; Jones, Shannon K; Katsikis, Georgios; Bhalla, Amneet Pal Singh; Griffith, Boyce E; Klotsa, Daphne | Abstract: We propose a reciprocal, self-propelled model swimmer at intermediate Reynolds numbers ($Re$). Our swimmer consists of two unequal spheres that oscillate in antiphase generating nonlinear steady streaming (SS) flows. We show computationally that the SS flows enable the swimmer to propel itself, and also switch direction as $Re$ increases. We quantify the transition in the swimming direction by collapsing our data on a critical $Re$ and show that the transition in swimming directions corresponds to the reversal of the SS flows. Based on our findings, we propose that SS can be an important physical mechanism for motility at intermediate $Re$.