DRAG ON NONSPHERICAL OBJECTS
DRAG ON NONSPHERICAL OBJECTS
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DOI：
10.1080/02786828708959128
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发表时间：
1987-01-01
影响因子：
5.2
通讯作者：
LEITH, D
中科院分区：
文献类型：
--
作者：
LEITH, D
斯托克斯定律描述了蠕动流动中球体所受的阻力。通过将流体与物体的相互作用分配给它与两个类似球体的相互作用，一个球体与物体具有相同的投影面积，另一个球体与物体具有相同的表面积，这一定律可以扩展到非球形物体。该方法被用来表征其形状因数在文献中报道的对象的动态形状因数。对于棱镜，基于这种方法的形状因子的数据与方程之间的一致性很好：R2=0.998。该方程和文献中的经验公式被用来预测球体、圆柱、棱柱、椭球和双锥面的形状因子，其形状因子已被报道。根据最小二乘性能指数判断，基于斯托克斯定律扩展的方程对形状系数的预测比经验方程更好。
Stokes's law describes drag force on a sphere in creeping flow. This law can be extended to a nonspherical object by allocating the interaction of the fluid with the object into its interaction with two analogous spheres, one with the same projected area and one with the same surface area as the object. This approach was used to characterize dynamic shape factor for objects whose shape factors are reported in the literature. Agreement between data and the equation for shape factor based on this approach was excellent for prisms:R2= 0.998. This equation and empirical equations from the literature were used to predict shape factor for a sphere, cylinders, prisms, spheroids, and double conicals whose shape factors have been reported. The equation based on the Stokes's law extension predicted shape factors better than the empirical equations, as judged by a least-squares index of performance.