The author deals with the flow of fluid through a pipe with narrow groove, and obtains the distributionofvelocities in the flow field.
本文研究了流体流过带有狭槽的管道的流动问题,得到了流场中的速度分布规律。
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And these additional velocities that galaxies have that aren't due to the expansion of the universe are due to the uneven distribution of matter in the universe.