This paper discusses the velocity separation in two-phase flow and the application of cross-correlation technique in two-phase flow measurement.
本文讨论两相流流动中的速度分离和相关法在两相流测量中的应用。
In the case of large density difference, there is a velocity separation between different media, making the measurement more difficult, cross-correlation method is still usable.
在密度差别较大时，存在着不同介质间的速度分离，给相关法测量带来困难。
So if I strobe this apple while it was falling I would see the separation, when it strobes to increase with time, because the velocity goes up with time.
如果用频闪相机拍摄，苹果下落的过程，可以看到频闪的间隔，苹果的距离，随着时间不断变大，因为速度随着时间而变大。
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