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김주성(J. S. Kim),오우섭(W. S. Oh),권오준(O. J. Kwon) 한국전산유체공학회 1999 한국전산유체공학회 학술대회논문집 Vol.1999 No.-
An implicit turbulent flow solver is developed for 2-D unstructured hybrid meshes. Spatial discretization is accomplished by a cell-centered finite volume formulation using an upwind flux differencing. Time is advanced by an implicit backward Euler time stepping scheme. Flow turbulence effects are modeled by the Spalart-Allmaras one equation model, which is coupled with wall function. The numerical method is applied for flows on a flat plate, the NACA 0012 airfoil, and the Douglas 3 element airfoil. The results are compared with experimental data.
2차원과 3차원에서의 비정렬 동적 적응격자 형성법에 관한 연구
박영민(Y. M. Park),오우섭(W. S. Oh),권오준(O. J. Kwon) 한국전산유체공학회 2000 한국전산유체공학회 학술대회논문집 Vol.2000 No.5
Two and Three dimensional dynamic adaptation code is developed for transient computations. This code involves mesh refinement and coarsening to either add points is high gradient regions of flow or remove points where they are not needed, for high spatial accuracy. Temporary cell algorithm is used to maintain the original grid Quality. To show the assessment of the accuracy and efficiency, two dimensional steady and unsteady flows are computed. Also, three dimensional steady computations are made to assess the refinement using temporary cell algorithm. The result shows the high spatial accuracy primarily in discontinuity regions in steady and unsteady computation.