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首页> 外文期刊>Journal of Biomechanics >Analysis of a swimmer's hand and arm in steady flow conditions using computational fluid dynamics.
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Analysis of a swimmer's hand and arm in steady flow conditions using computational fluid dynamics.

机译：使用计算流体力学分析稳定流动条件下游泳者的手和手臂。

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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 90 degrees. 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.
机译：迄今为止，由游泳者的手和手臂产生的推进力已通过实验测试严格确定。作为这些复杂而昂贵的实验的替代方法，本研究应用了计算流体动力学（CFD）数值技术来计算游泳者的手和手臂在不同迎角附近的稳定流量。为手和手臂计算的力系数与通过实验确定的稳态系数进行了很好的比较。仿真结果表明，手臂和手之间的边界层明显分离，这表明不应将Bernoulli方程用于数学描述游泳者产生的升力。另外，显示“ 2D”升力对于所有迎角的手臂和接近90度迎角的手都是不准确的。这样的模拟用于验证所选的CFD技术，并且是使用CFD方法确定更复杂的非稳态流动条件下游泳水动力的重要的第一步。

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