In this paper, we try to solve the problem of motion between two adjacent galaxies by using the motion of the dark matter fluid driven by the rotation of galaxies. In this study, it is believed that when two adjacent galaxies differ in their direction and relative position, it is easy to lead to differences in the speed of dark matter fluid motion between the two galaxies, which will form the so-called Bernoulli force. This Bernoulli force is one of the reasons why the positions of galaxies in many of the multigalaxies we have observed so far are relatively random. If Newton's theory of gravity or general relativity is used to explain it, then the motion of galaxies due to gravitational effects purely should be circular. This is not quite the same as what we have observed. In fact, in the multigalaxies that we now observe, the movements of the various galaxies exhibit a state of random motion similar to Brownian motion. The existence of this state of random motion can be well explained by dark matter fluids. The estimates in this paper are also largely similar to those of my previous work that the effects of dark matter fluids are on the same order of magnitude as gravitational effects.