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ID 16597
file
title alternative
Generation mechanism of secondary flow in a straight compound open channel based on momentum equations
creator
Satoh, Hiroyuki
subject
Compound Open Channel
Turbulent Flow
Large Eddy Simulation
Smagorinsky Model
Reynolds Stress
Secondary Flow
NDC
Construction. Civil engineering
abstract
Large eddy simulation of fully developed turbulent flow in a compound open channel was carried out using the Smagorinsky model. The Reynolds number based on hydraulic radius and cross sectional averaged velocity is 5300. The mechanism of secondary flow is discussed by evaluating terms in the momentum equations for mean secondary flow. To clarify the important role of pressure gradients in driving the secondary currents, pressure is decomposed into several components that account for the contributions of convection, external force, the Reynolds stresses, and the viscosity. It is found that not only the Reynolds stresses but also the pressure gradients induced by the normal and shear Reynolds stresses play a major role in generating secondary flow.
journal title
水工学論文集
volume
Volume 43
start page
371
end page
376
date of issued
1999-02
publisher
土木学会
issn
0916-7374
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Engineering