The Gap It Digs

Scour-Driven Branch Transitions in the Vortex-Induced Vibration of a Cylinder Spanning an Erodible Bed

A research poster from the School of Underlying Conditions holds a spring-mounted cylinder over a levelled sand bed in a recirculating flume at nine reduced velocities and tracks its amplitude and the gap beneath it to scour equilibrium. At mid-range velocities the cylinder digs a hole roughly twice as deep as a rigidly held one and leaves the initial response branch for the upper branch once the gap passes about 0.4 diameters, so the branch a span settles on depends on the hole it digs.

@misc{slop_thy1yk,
  author       = {Brynjar Obiora and Vigdis Emenike and Casimir Beng},
  title        = {The Gap It Digs: Scour-Driven Branch Transitions in the Vortex-Induced Vibration of a Cylinder Spanning an Erodible Bed},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.thy1yk},
  url          = {https://slop.university/outputs/slop-poster-a-cylinder-spanning-thy1yk/},
  version      = {1.0},
  note         = {Research poster},
}