Figure 2. Relative positions of a TC with respect to an adherent PMN from a top-view.

Five PMN-to-TC position states, A) a TC approaches a PMN; B) a TC collides with a PMN; C) a TC forms a transient aggregate with a PMN; D) a TC firmly adheres to a PMN; and E) a TC detaches from a PMN with the flow from left to right.