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| Numerical simulation of two self-propelled fish swimming in a side-by-side arrangement |
| Received:April 17, 2012 Revised:September 28, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201401018 |
| KeyWord:side-by-side arrangement lateral distance self-propelled swimming speed |
| Author | Institution |
| 王亮 |
解放军理工大学 气象海洋学院, 南京 |
| 王明 |
大连理工大学 水利工程学院, 大连 ;黄河水利科学研究院, 郑州 |
| 付强 |
解放军理工大学 气象海洋学院, 南京 |
| 苗仁德 |
解放军理工大学 气象海洋学院, 南京 |
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| Abstract: |
| Numerical simulations of two self-propelled fish in a side-by-side arrangement has been numerically investigated using an adaptive version of immersed boundary method.Two typical cases of the phase difference between the adjacent fish,i.e.,in-phase and anti-phase self-propelled swimming,are considered.Compared with the performance of a single self-propelled fish swimming,the results show that:(1) the swimming speed of fish school is smaller than that of an individual fish,and decrease as the lateral distance decrease,and that of the anti-phase case is bigger than that of the in-phase case with the same lateral distance;(2) the drag of fish school is bigger than that of an individual fish,and increases as the lateral distance decreases;(3) the power consumption of the anti-phase case increases as the lateral distance decreases,which is opposite to that of the in-phase case;(4) the propulsive efficiency increases slightly when the lateral distance is bigger than 0.5 L (L is the fish body length).Therefore,with the consideration of the swimming speed and the propulsive efficiency,two side-by-side arranged fish should beat their tails in anti-phase and the lateral distance should be bigger than 0.5 L, which is consistent with the observations in nature. |
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