運動量方程式に基づく複断面直線開水路乱流における二次流の生成機構の考察
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00016597
ID | 16597 |
file | |
title alternative | Generation mechanism of secondary flow in a straight compound open channel based on momentum equations
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creator |
Satoh, Hiroyuki
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subject | Compound Open Channel
Turbulent Flow
Large Eddy Simulation
Smagorinsky Model
Reynolds Stress
Secondary Flow
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NDC |
Construction. Civil engineering
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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.
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journal title |
水工学論文集
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volume | Volume 43
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start page | 371
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end page | 376
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date of issued | 1999-02
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publisher | 土木学会
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issn | 0916-7374
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ncid | |
language |
jpn
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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department |
Graduate School of Engineering
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