The fourth parabolic flight campaign (PFC66) of the Vip-Gran instrument were performed in Bordeaux  (France) in May 2017.

We observe for the first time a transition for rods between a gas-like regime of to a cluster-like regime when the density of rods is increased.

Gaseaous state (1% in volume fraction)

Cluster of rods in the center of the cell (3% in volume fraction)