Accession Number:

ADP013677

Title:

Direct Numerical Simulation of the Fully Developed Open-Channel Flow at Subcritical Froude Numbers

Descriptive Note:

Conference paper

Corporate Author:

KOBE UNIV (JAPAN) GRADUATE SCHOOL OF SCIENCE AND TECHNOLOGY

Personal Author(s):

Report Date:

2001-08-01

Pagination or Media Count:

9.0

Abstract:

Direct numerical simulationDNS of a fully-developed open- channel flow has been carried out for subcritical Froude numbers at a fixed friction-velocity Reynolds number of 180. The free surface is approximated by small-amplitude wave theory. The results are presented emphasizing the effects of the Froude number on turbulence quantities related to the free surface fluctuations. The amplitude of the free-surface fluctuation increases as the square of the Froude number. While statistical quantities involving the vertical velocity component are most influenced by the Froude number but only in the region close to the free surface, quantities related to the pressure fluctuations are influenced over much wider region.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE