Direct numerical simulation of turbulent flow in a square duct: Analysis of secondary flows

Younghoon Joung, Sung Uk Choi, Jung Il Choi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A direct numerical simulation of turbulent flow in a square duct was performed for a Reynolds number based on bulk streamwise velocity and duct height equal to 4,440. The mechanism by which secondary flows are generated in a square duct was investigated. Two counterrotating secondary flows occur around the duct corner. These secondary flows were found to play a key role in momentum transfer between the corner and center of the duct. A conditional quadrant analysis was performed in the local maximum and minimum regions of the wall shear stress in order to characterize the pattern of the mean secondary flows.

Original languageEnglish
Pages (from-to)213-221
Number of pages9
JournalJournal of Engineering Mechanics
Volume133
Issue number2
DOIs
Publication statusPublished - 2007 Feb 1

Fingerprint

Secondary flow
Direct numerical simulation
Ducts
Turbulent flow
Momentum transfer
Shear stress
Reynolds number

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Direct numerical simulation of turbulent flow in a square duct : Analysis of secondary flows. / Joung, Younghoon; Choi, Sung Uk; Choi, Jung Il.

In: Journal of Engineering Mechanics, Vol. 133, No. 2, 01.02.2007, p. 213-221.

Research output: Contribution to journalArticle

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