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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
- Issue Date
- 2009-03
- Publisher
- 한국전산유체공학회
- Citation
- 한국전산유체공학회지, Vol.14 No.1, pp. 35-44
- Keywords
- 공학 ; 유동망 시스템 ; Flow Network System ; 유한체적법 ; Finite Volume Method ; 경계처리 ; Boundary Treatment ; 정션결합 ; Junction Coupling ; 유령정션법 ; Ghost Junction Method ; 직접변환법 ; Direct Transform Method
- Abstract
- To adequately analyze flows in pipe or duct network system, traditional node-based junction coupling methods require the junction loss which is specified by empirical or analytic correlations. In this paper, a new finite volume (unction coupling method using a ghost junction cell is developed by considering the interchange of linear momentum as well as the important wall-effect at junction without requiring any correlation on the junction loss. Also, boundary treatment is modified to preserve the stagnation enthalpy across boundaries, such as pipe-end and the interface between junction and branch. Also, the computational accuracy and efficiency of the Godunov-type finite volume schemes are investigated by tracing the total mechanical energy of rapid transients due to sudden closure of valve at downstream end.
- ISSN
- 1598-6071
- Language
- Korean
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