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
水工学論文集 Volume 43
Page 371-376
published_at 1999-02
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| File | |
| Title ( jpn ) |
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
|
| Title ( eng ) |
Generation mechanism of secondary flow in a straight compound open channel based on momentum equations
|
| Creator |
Satoh Hiroyuki
|
| Source Title |
水工学論文集
|
| Volume | 43 |
| Start Page | 371 |
| End Page | 376 |
| 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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| Keywords |
Compound Open Channel
Turbulent Flow
Large Eddy Simulation
Smagorinsky Model
Reynolds Stress
Secondary Flow
|
| NDC |
Construction. Civil engineering [ 510 ]
|
| Language |
jpn
|
| Resource Type | journal article |
| Publisher |
土木学会
|
| Date of Issued | 1999-02 |
| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0916-7374
[NCID] AN10426673
|
