On some approaches to solve CFD problems

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• 作者：Kovenya ; V. ; Cherny ; S. ; Sharov ; S. ; Karamyshev ; V. ; Lebedev ; A.
• 关键词：Euler and Navier&ndash ; Stokes equations ; Artificial compressibility ; Incomplete LU decomposition ; Convergence acceleration ; Multigrid method
• 刊名：Computers and Fluids
• 出版年：2001
• 出版时间：September, 2001
• 年：2001
• 卷：30
• 期：7-8
• 页码：903-916
• 全文大小：743 K

文摘

This paper presents two efficient methods for spatial flows calculations. In order to simulate of incompressible viscous flows, a second-order accurate scheme with an incomplete LU decomposed implicit operator is developed. The scheme is based on the method of artificial compressibility and Roe flux-difference splitting technique for the convective terms. The numerical algorithm can be used to compute both steady-state and time-dependent flow problems. The second method is developed for modeling of stationary compressible inviscid flows. This numerical algorithm is based on a simple flux-difference splitting into physical processes method and combines a multi level grid technology with a convergence acceleration procedure for internal iterations. The capabilities of the methods are illustrated by computations of steady-state flow in a rotary pump, unsteady flow over a circular cylinder and stationary subsonic flow over an ellipsoid.