Author(s): A. Kurniawan; M. S. Altinakar; W. H. Graf
Linked Author(s):
Keywords: Local scour; Eroding jet; Scour depth; Flow pattern
Abstract: Local scour may occur when a hydraulic structure is positioned in a channel with an erodible bed. This paper investigates experimentally the erosion and flow pattern due to a water jet passing over a channel bed. The development of the scour hole, its maximum scour depth, and length, are recorded and compared with available scour-depth relations. The distributions of the velocity vectors are presented, showing a diving free jet followed by a wall jet. Reynolds stresses were evaluated from the measured velocity fluctuations. These stresses, important in the center of the jet, are vanishingly small at the bed of the scour hole.
Year: 2001