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유동망 시스템 해석을 위한 경계처리에 대한 보존형 유한체적법 = Conservative finite volume method on boundary treatments for flow network system analyses

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Authors
홍석우; 김종암
Issue Date
2008-10
Publisher
한국전산유체공학회 = Korean Society of Computational Fluids Engineering
Citation
한국전산유체공학회 2008년도 추계학술대회논문집, 2008. 10., pp. 19-26
Keywords
유동망 시스템(Flow Network System)유한체적법(Finite Volume Method)경계처리(Boundary Treatment)정션결합(Junction Coupling)유령정션법(Ghost Junction Method)직접변환법(Direct Transform Method)
Abstract
From numerical point of view on flow network system analyses, stagnation properties are not preserved along streamlines across geometric discontinuities. Hence, GJM and DTM using ghost cell and thermodynamic relations are developed to preserve the stagnation enthalpy for the boundaries, such as the interfaces between junction and branches and the interface between two pipes of different cross-sections in serial pipelines. Additionally, the resolving power and efficiencies of the 2nd order Godunov type FV schemes are investigated and estimated by the tracing of the total mechanical energy during calculating rapid transients. Among the approximate Riemann solvers, RoeM is more suitable with the proposed boundary treatments especially for junction than Roes FDS because of its conservativeness of stagnation enthalpy across geometric discontinuities.
Language
Korean
URI
http://uci.or.kr/G300-cX1153538.vn0p19

https://hdl.handle.net/10371/7680
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Others_기계항공공학부
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