Rod climbing: The Weissenberg Effect —Henry Ng & Rob Poole, University of Liverpool

A rotating rod is partially submerged in an aqueous solution (~1wt%) of polyacrylamide acid (PAA). With inertia present, a Newtonian fluid moves outwards toward the container walls. Here, however, the fluid climbs the rod due to the elastic stresses generated along the streamlines by the rotation of the rod. The photo is not a composite and has not been enhanced.

https://fluids.ac.uk/files/02_Henry_Ng_Rob_Poole_Rod_climbing.1568273307.jpg