ENTRANCE LOSS AND BOUNDARY DEVELOPMENT IN SMOOTH- AND ROUGH-WALLED RECTANGULAR CONDUITS

The paper summarizes the results of analytical studies on energy losses during boundary layer development in the entrance of smooth and rough conduits. Velocities as defined by the Blasius Law were used to relate the local pressure, momentum of the liquid and the wall friction. The analytical studies resulted in entrance loss of 0.077 and 9.096 of the conduit velocity head, respectively for the smooth and rough conduit conditions.

• Corporate Authors:

  U.S. Army Waterways Experiment Station

  3909 Halls Ferry Road
  Vicksburg, MS  United States  39180-6199
• Authors:
  • Keulegan, G H
• Publication Date: 1968-9

Media Info

• Pagination: 56 p.

Subject/Index Terms

• TRT Terms: Channel flow; Roughness; Velocity
• Uncontrolled Terms: Open channel flow
• Old TRIS Terms: Fluid energy losses; Velocity profiles
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00019403
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AEWES-MiscPaperH68-2
• Files: TRIS
• Created Date: Nov 19 1972 12:00AM