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�������պ����ѧѧ�� 2006, Vol. 32 Issue (04) :481-483    DOI:
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Numerical simulation of influence of two different hand-figures on swim propulsive efficiency
Kang Honglin, Yuan Wu, Gao Ruize, Yan Chao*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� In order to find which hand-figures could provide higher propulsive efficiency for swimming, two different 3D unstructured grid models of a native woman swimmer’s hand and forearm were generated based on two hand-figures-fingers splaying and fingers holding together. The numerical technique of computational fluid dynamics (CFD) was applied to calculate the steady flow around the swimmer's hand and forearm in two different hand-figures at various speeds when angle of attack was 90°. The drags, lifts and corresponding coefficients were computed for the hand and forearm, and the flow fields around the hand and forearm were analyzed based on the calculated data, which showed the influence of hand-figures on swimming propulsive efficiency. The results show that the forcescaused by pressure difference are the major part of the propulsive forces, swimming with fingers holding together provides higher propulsive efficiency than swimming with fingers splaying when the angle of attack is 90°.
Keywords�� computational fluid dynamics   swim   hand-figure   propulsive force     
Received 2005-01-25;
Fund:

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About author: ������(1979-), Ů, ����������, ��ʿ��,klgiant@163.com.
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������, Ԭ��, ������, �ֳ�.�������ζ���Ӿ�ƽ�Ч��Ӱ�����ֵģ��[J]  �������պ����ѧѧ��, 2006,V32(04): 481-483
Kang Honglin, Yuan Wu, Gao Ruize, Yan Chao.Numerical simulation of influence of two different hand-figures on swim propulsive efficiency[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(04): 481-483
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