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저속 압축성 유동에 대한 국소 예조건화 기법 적용 연구
류세현,이승수,김범수,Ryu, Se-Hyun,Lee, Seung-Soo,Kim, Beom-Soo 한국군사과학기술학회 2006 한국군사과학기술학회지 Vol.9 No.2
Time marching methods are well-suited for high speed compressible flow computations. However, it is well known that the time marching methods suffer a slow down in convergence due to disparity in Eigenvalues. A local preconditioning method is one of numerical methods to enhance convergence characteristics of low mach number flows by modifying Eigenvalues of the governing equations. In this paper, the local preconditioning method of Weiss is applied to a 2 dimensional Navier-Stokes code and the efficiency of the preconditioning method is shown through a number of computational examples.