Investigation of Fully Developed Turbulent Flow in a Straight Duct With Large Eddy Simulation

[+] Author and Article Information
M. D. Su

Tsinghua University, Beijing, 100084, PR China

R. Friedrich

Lehrstuhl für, Fluidmechanik, TU München, 80333 München, Germany

J. Fluids Eng 116(4), 677-684 (Dec 01, 1994) (8 pages) doi:10.1115/1.2911835 History: Received July 01, 1993; Revised May 02, 1994; Online May 23, 2008


Large eddy simulations have been performed in straight ducts with square cross section at a global Reynolds number of 49,000 in order to predict the complicated mean and instantaneous flow involving turbulence-driven secondary motion. Isotropic grid systems were used with spatial resolutions of 256 * 642 . The secondary flow not only turned out to develop extremely slowly from its initial conditions but also to require fairly high resolution. The obtained statistical results are compared with measurements. These results show that the large eddy simulation (LES) is a powerful approach to simulate the complex turbulence flow with high Reynolds number. Streaklines of fluid particles in the duct show the secondary flow clearly. The database obtained with LES is used to examine a statistical turbulence model and describe the turbulent vortex structure in the fully developed turbulent flow in a straight duct.

Copyright © 1994 by The American Society of Mechanical Engineers
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