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CONSERVATIVE FINITE VOLUME METHOD ON BOUNDARY TREATMENTS FOR FLOW NETWORK SYSTEM ANALYSES  

Hong, S.W. (서울대학교 대학원 기계항공공학부)
Kim, C. (서울대학교 기계항공공학부)
Publication Information
Journal of computational fluids engineering / v.14, no.1, 2009 , pp. 35-44 More about this Journal
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 junction 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.
Keywords
Flow Network System; Finite Volume Method; Boundary Treatment; Junction Coupling; Ghost Junction Method; Direct Transform Method;
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