Process of scour induced by unidirectional flow around cylindrical structures in sandy beds affected by vibration

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Olga Areshkovych, Richard Simons, Mohammed Al-Hammadi

Wednesday 1 july 2015

12:36 - 12:39h at Mississippi (level 1)

Themes: (T) Sediment management and morphodynamics, (ST) Sediment transport mechanisms and modelling, Poster pitches

Parallel session: Poster pitches: 8A. Sediment - Erosion

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Most structures under unidirectional flows are subjected to scour. However, little is known about how cylindrical structures in sandy beds are actually affected by vibrations. Therefore, a series of laboratory tests have been conducted in the Fluids Lab at the University College London to reveal and confirm influence of different vibration ranges on structures in coarse sand. Depending on the initial state of the sand - compacted or decompressed - two contrary types of soil behavior can be observed: dilation or contraction respectively. This paper focuses on the scour process around cylindrical structures in sand due to vibration subjected to the various loads.