예조건화된 압축성 유동 수치기법에서의 풍상차분법의 수치특성 검토Numerical Characteristics of Upwind Schemes for Preconditioned Compressible Navier-Stokes Equations

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Studies of the numerical characteristics of implicit upwind schemes, such as upwind ADI, Line Gauss-Seidel(LGS) and Point Gauss-Seidel(LU) algorithms, for preconditioned Navier-Stokes equations ate performed. All the algorithms are expressed in approximate factorization form and Von Neumann stability analysis and convergence studies are made. Preconditioning is applied for efficient convergence at low Mach numbers and low Reynolds numbers. For high aspect ratio computations, the ADI and LGS algorithms show efficient and uniform convergence up to moderate aspect ratio if we adopt viscous preconditioning based on min- CFL/max- VNN time-step definition. The LU algorithm, on the other hand, shows serious deterioration in convergence rate as the grid aspect ratio increases. Computations for practical applications also verify these results.
Publisher
한국전산유체공학회
Issue Date
2002
Language
KOR
Citation

한국전산유체공학회 2002년도 추계 학술대회, pp.95 - 102

URI
http://hdl.handle.net/10203/137189
Appears in Collection
AE-Conference Papers(학술회의논문)
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