A numerical investigation on the flow physics of koi carp (Cyprinus carpio koi) burst-and-coast swimming

CORC > 力学研究所 > 中国科学院力学研究所 > 水动力学与海洋工程重点实验室(2009-2011)

	A numerical investigation on the flow physics of koi carp (Cyprinus carpio koi) burst-and-coast swimming
	Yang Y(杨焱)
	2010-01-14
会议名称	The 4th International Symposium on Aero Aqua Bio-Mechanisms (ISABMEC 2009)
会议日期	2009-08-29~2009-09-02
通讯作者邮箱	yangy@ustc.edu
会议地点	Shanghai
通讯作者	杨焱
中文摘要	Abstract—Burst-and-coast is the most common locomotion type in freely routine swimming of koi carps (Cyprinus carpio koi), which consists of a burst phase and a coast phase in each cycle and mostly leads to a straight-line trajectory. Combining with the tracking experiment, the flow physics of koi carp’s burst-andcoast swimming is investigated using a novel integrated CFD method solving the body-fluid interaction problem. The dynamical equations of a deforming body are formulated. Following that, the loose-coupled equations of the body dynamics and the fluid dynamics are numerically solved with the integrated method. The two burst modes, MT (Multiple Tail-beat) and HT (Half Tail-beat), which have been reported by the experiments, are investigated by numerical simulations in this paper. The body kinematics is predicted and the flow physics is visualized, which are in good agreement with the corresponding experiments. Furthermore, the optimization on the energy cost and several critical control mechanisms in burst-and-coast swimming of koi carps are explored, by varying the parameters in its selfpropelled swimming. In this paper, energetics is measured by the two mechanical quantities, total output power CP and Froude efficiency Fr. Results and discussion show that from the standpoint of mechanical energy, burst-and-coast swimming does not actually save energy comparing with steady swimming at the same average speed, in that frequently changing of speed leads to decrease of efficiency.
收录类别	其他
合作状况	国内
会议录	The 4th International Symposium on Aero Aqua Bio-Mechanisms (ISABMEC 2009).Shanghai.2009-08-29~2009-09-02.
学科主题	生物力学
语种	英语
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/33044]
专题	力学研究所_水动力学与海洋工程重点实验室(2009-2011)
通讯作者	Yang Y(杨焱)
推荐引用方式 GB/T 7714	Yang Y. A numerical investigation on the flow physics of koi carp (Cyprinus carpio koi) burst-and-coast swimming[C]. 见:The 4th International Symposium on Aero Aqua Bio-Mechanisms (ISABMEC 2009). Shanghai. 2009-08-29~2009-09-02.