DRAG OF YAWED PILE GROUPS AT LOW REYNOLDS NUMBERS

The hydrodynamic drag on square arrays of model cylindrical piles in the Reynolds number range of 250 to 750 is shown to be a function of the angle of yaw of the incident flow and is also related to a parameter termed the normalized projected area. The drag coefficient of a pile group increases as the number of piles is reduced and as the pile spacing is increased and may be greater than the measured single-pile value of 0.94 in the velocity gradient flow. The data suggest that the replacement of a structure consisting of a large number of small-diameter piles by an equivalent group of fewer larger diameter piles will reduce disturbance of the flow field and thus reduce siltation and ship-mooring forces.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ball, D J
  • Hall, C D
• Publication Date: 1980-5

Media Info

• Features: References;
• Pagination: p. 229-238
• Serial:
  • ASCE J of the Waterway, Port, Coastal & Ocean Div
  • Volume: 106
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Coastal engineering; Drag forces; Dynamic loads; Flow fields; Foundations; Hydrodynamic pressure; Mooring; Moorings; Navigation; Piers (Supports); Piers (Wharves); Pile foundations; Pile groups; Piles (Supports); Port structures; Reynolds number; Ships
• Old TRIS Terms: Hydrodynamic forces
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00316288
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 8 1980 12:00AM