Numerical simulation of scour process around bridge piers in cohesive soil /
are evaluated using a two-layer turbulence model. At each
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1997.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | are evaluated using a two-layer turbulence model. At each around a cylinder on the Reynolds number was investigated around a model cylindrical pier mounted in porcelain were around the cylinder. The variations of the streambed Averaged Navier-Stokes (RANS) method in a general body-fitted bathymetry and the shear stress distribution with time were calculate bridge pier scour in flood conditions. By means of calculated. The computed time histories of scour depth were computational results. conducted. The numerical solutions successfully captured the connect the overlapped grids together and transfer infor curvilinear coordinate system with an incorporation of a depth increase is calculated by multiplying the scour rate by distribution is calculated, and the scour rate at each bed Finally, the dependence of the maximum streambed shear stress important flow features such as flow separations and eddies in good agreement with the experimental results. A scour increase with decreasing critical shear stress. The slope of mation across the grid boundaries. The turbulence quantities maximum streambed shear stress was obtained based on the numerical computation, a parameter study was also carried out point is determined through the scour rate equation. Scour process around a full-scale cylindrical pier was computed as process in cohesive soil around cylindrical bridge piers. scour rate equation. The chimera technique is employed to slope is, the more quickly the final scour depth is attained. slope of scour rate curve on scour process. It is found that the effects of the critical shear stress are significant. The final scour depth and the time needed to reach it The numerical method is a multi-block chimera Reynolds- the time increment. Numerical simulations of scour process the time to reach the final scour depth. The steeper the This thesis is concerned with numerical simulation of scour through numerical computations. An empirical formula of the time step in computation, the streambed shear stress to study the influences of the critical shear stress and the well to present the numerical method's capability to |
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| Item Description: | "Major subject: Ocean Engineering". Vita. |
| Physical Description: | ix, 79 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: 76-78. |