S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Others_기계항공공학부
유동망 시스템 해석을 위한 경계처리에 대한 보존형 유한체적법
CONSERVATIVE FINITE VOLUME METHOD ON BOUNDARY TREATMENTS FOR FLOW NETWORK SYSTEM ANALYSES
- 홍석우; 김종암
- Issue Date
- 한국전산유체공학회지 제14권 제1호, pp. 35-44
- 공학; 유동망 시스템; Flow Network System; 유한체적법; Finite Volume Method; 경계처리; Boundary Treatment; 정션결합; Junction Coupling; 유령정션법; Ghost Junction Method; 직접변환법; Direct Transform Method
- 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.