The motion of a fluid in a cylindrical container with a free surface following vertical impact
The motion of a fluid in a cylindrical container with a free surface following vertical impact
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具有自由表面的圆柱形容器中的流体在垂直冲击后的运动
DOI：
10.1017/s0022112069000644
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发表时间：
1969
影响因子：
3.7
通讯作者：
J. Milgram
中科院分区：
文献类型：
--
作者：
J. Milgram
考虑了部分充满流体的容器的垂直速度突然变化的影响。它表明，非常小的自由表面扰动可以放大到如此强烈的速度变化，不稳定可能发生。这种不稳定性经常导致射流从自由表面发出。在自由落体的容器中引起自由表面扰动的条件被认为是，它示出的流体和容器的壁之间的接触角不同于½π弧度可以扭曲的表面，在这样一种方式，放大和不稳定的垂直冲击的结果在一个中心射流。给出了这种效应的实验结果。附录中考虑了由于瞬态侧壁运动而产生的波浪，例如可能由撞击时的流体压力引起的波浪。它表明，这种波将有一个不同的形式比那些在实验中观察到的。
The effect of a sudden change in vertical velocity of a vessel partially filled with fluid is considered. It is shown that very small free surface disturbances can be amplified so strongly by a velocity change that instability can occur. This instability frequently causes a jet to emanate from the free surface. Conditions causing free surface disturbances in a vessel in free fall are considered and it is shown that a contact angle between the fluid and the wall of the vessel different from ½π radians can distort the surface in such a way that the amplification and instability upon vertical impact results in a central jet. The results of experiments of this effect are shown. The generation of waves due to transient side wall motions, such as those that might result from fluid pressure at impact, are considered in the appendix. It is shown that such waves would have a different form than those observed in the experiments.