Forces and energetics of intermittent swimming

作     者：Daniel Floryan Tyler Van Buren Alexander J.Smits 

作者机构：Department of Mechanical and Aerospace EngineeringPrinceton University Princeton NJ 08544 USA 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2017年第33卷第4期

页      面：725-732页

核心收录：

学科分类：071011[理学-生物物理学] 0710[理学-生物学] 07[理学] 

基　　金：supported by the US Office of Naval Research (Grant N00014-14-1-0533) (Program Manager Robert Brizzolara) 

主　　题：intermittent swimming maintained conclusion cycle thrust favorable producing aquatic circles 

摘      要：Experiments are reported on intermittent swimming motions. Water tunnel experiments on a nominally two-dimensional pitching foil show that the mean thrust and power scale linearly with the duty cycle, from a value of 0.2 all the way up to continuous motions, indicating that individual bursts of activity in intermittent motions are independent of each other. This conclusion is corroborated by particle image velocimetry（PIV） flow visualizations, which show that the main vortical structures in the wake do not change with duty cycle. The experimental data also demonstrate that intermittent motions are generally energetically advantageous over continuous motions. When metabolic energy losses are taken into account, this conclusion is maintained for metabolic power fractions less than 1.