Effects of Gravity and Surface Tension Upon Liquid Jets Leaving Poiseuille Tubes
Effects of Gravity and Surface Tension Upon Liquid Jets Leaving Poiseuille Tubes
复制标题
重力和表面张力对离开泊肃叶管的液体射流的影响
DOI：
10.1115/1.3605087
复制
发表时间：
1968
期刊：
影响因子：
--
通讯作者：
J. Lienhard
中科院分区：
文献类型：
--
作者：
J. Lienhard
本文发展了一种二维不可压边界层方程中横向速度分量的近似方法。该方法仅限于在横向坐标系中对称的流动，并且在预测射流和尾流等问题中，它便于容易的数值积分。预测的速度分布和直径的自由退出Poilluille流，重力和表面张力的影响下，然后进行。通过本方法得到的分析结果与实验结果非常接近。实验还表明，在低韦伯数的情况下，在出口平面处的接触角可以支配出口轮廓的早期松弛。
A method is developed for approximating the transverse velocity component in the incompressible two-dimensional boundary layer equations. The method is restricted to flows that are symmetrical in the transverse coordinate, and it facilitates easy numerical integration in such problems as the prediction of jet and wake flows. The prediction of velocity profiles and diameters for free exiting Poiseuille flows, under the influence of both gravity and surface tension, is then undertaken. Analytical results obtained by the present method are found to agree very closely with experiments. The experiments also show that, in low Weber number situations, contact angle at the exit plane can dominate the early relaxation of the exit profile.