任意の境界形状を有する二次元浅水流の高精度解析手法の開発

水工学論文集 Volume 50 Page 799-804 published_at 2006-02
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Title ( jpn )
任意の境界形状を有する二次元浅水流の高精度解析手法の開発
Title ( eng )
Development of a highly accurate numerical method for shallow-water flows with arbitrary boundary shapes
Creator
Uchida Tatsuhiko
Source Title
水工学論文集
Volume 50
Start Page 799
End Page 804
Abstract
A versatile numerical method of flows with complex boundaries is highly needed in many hydraulic practices. This paper presents a new computational approach for shallow water flows with the emphasis on the accurate modeling of complex geometries in the Cartesian coordinate system. Expanding the concept of CIP-CSL2 scheme, the present method simultaneously solves point, line and area averaged values of a computational cell to directly capture the effects of complex boundary shapes and conditions. The method is then tested against the one-dimensional dam-break problem to find good agreement with theoretical results. Further, the applicability of the method is demonstrated for two flows. In one case, hydraulic bores bounce from impermeable walls and in the other case water flows between narrow impermeable walls whose direction is arbitrary, both of which are known to be tough problems.
Keywords
CIP-CSL2 scheme
line and area averaged values
boundary condition
shallow-water flow
numerical analysis
dam-break problem
NDC
Construction. Civil engineering [ 510 ]
Language
jpn
Resource Type journal article
Publisher
土木学会
Date of Issued 2006-02
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 0916-7374
[NCID] AN10426673