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| Numerical simulation of two self-propelled fish swimming in a tandem arrangement |
| Received:May 02, 2012 Revised:October 28, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201305023 |
| KeyWord:tandem arrangement self-propelled swimming propulsive efficiency energy-saving efficiency |
| 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 |
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| Abstract: |
| Using an adaptive version of immersed boundary method,the self-propelled swimming of two tandem fish with the same tai-beat frequency was investigated numerically.The energy-saving effect was analyzed by introducing a novel concept of energy-saving efficiency.The results show that the self-propelled swimming speeds of the two tandem fish are higher than that of single fish.The drag of the downstream fish is increased,and the power consumption is reduced,which means the downstream fish can extract energy from the vortex induced by the upstream fish.On the other hand,the upstream fish can also benefit from the downstream fish when the streamwise distance between the two tandem fish is small enough.In addition,the results also show that high propulsive efficiency does not mean high energy-saving efficiency.The energy-saving effect of the anti-phase case is more remarkable than that of the in-phase case.The average energy-saving efficiency of the anti-phase case is as high as 22.4%. |
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