SCOUR BEHIND CIRCULAR CYLINDERS IN DEEP WATER

Jorg Imberger, Des Alach, John Schepis

Abstract


Flume test data is presented for the depth of scour in deep water near a vertical cylinder placed in a uniform sand and a fine calcareous ocean sediment. The ratio of the depth of scour to the cylinder diameter at equilibrium is shown to depend only on the ratio of the shear velocity to the critical shear velocity at which bed motion is initiated. Protection against scour by placing collars around the cylinder is shown to be of marginal value.

Keywords


deep water; scour; vertical cylinder

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