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Journal of the Korea Institute of Military Science and Technology 2006;9(2):152-160.
A Study of Local Preconditioning Method for Compressible Low Speed Flows
Se-Hyun Ryu, Seung-Soo Lee, Beom-Soo Kim
1
2
저속 압축성 유동에 대한 국소 예조건화 기법 적용 연구
류세현, 이승수, 김범수
1인하대학교 항공공학과
2인하대학교 기계공학부 항공우주공학
Abstract
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.
Key Words: Time Marching Method, Compressible Flow, Local Preconditioning Method


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