Analysis of a swimmer's hand and arm in steady flow conditions using computational fluid dynamics
Analysis of a swimmer's hand and arm in steady flow conditions using computational fluid dynamics
复制标题
DOI：
10.1016/s0021-9290(01)00246-9
复制
发表时间：
2002-05-01
影响因子：
2.4
通讯作者：
Riewald, S
中科院分区：
文献类型：
--
作者：
Bixler, B;Riewald, S
迄今为止，游泳运动员的手和手臂产生的推进力是通过严格的实验测试确定的。为了替代这些复杂而昂贵的实验，本研究应用了计算流体动力学（CFD）的数值技术来计算游泳者的手和手臂在不同攻角下的稳定流动。计算得到的手和手臂的力系数与实验确定的稳态系数比较好。模拟结果显示，手臂和手的边界层明显分离，这表明伯努利方程不应该用于数学上描述游泳者产生的升力。此外，“2D”举升被证明是不准确的手臂在所有的攻角和近90度的攻角的手。这种模拟有助于验证所选择的CFD技术，并且是使用CFD方法确定更复杂非定常流条件下游泳水动力的重要的第一步。(C) 2002年Elsevier Science Ltd.出版
Propulsive forces generated by swimmers' hands and arms have, to date, been determined strictly through experimental testing. As an alternative to these complex and costly experiments, the present research has applied the numerical technique of Computational fluid dynamics (CFD) to calculate the steady flow around a swimmer's hand and arm at various angles of attack. Force coefficients computed for the hand and arm compared well with steady-state coefficients determined experimentally. The simulations showed significant boundary layer separation from the arm and hand, suggesting that Bernoulli's equation should not be used to mathematically describe the lift generated by a swimmer. Additionally, "2D" lift was shown to be inaccurate for the arm at all angles of attack and for the hand near angles of attack of 90degrees. Such simulations serve to validate the chosen CFD techniques, and are an important first step towards the use of CFD methods for determining swimming hydrodynamic forces in more complex unsteady flow conditions. (C) 2002 Published by Elsevier Science Ltd.