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IMMERSED BOUNDARY METHOD FOR THE ANALYSIS OF 2D FLOW OVER A CYLINDER AND 3D FLOW OVER A SPHERE
D.V. Fernandes(페르난데스),Y.K. Suh(서용권),S. Kang(강상모) 한국전산유체공학회 2007 한국전산유체공학회 학술대회논문집 Vol.2007 No.-
IB (immersed boundary) method is one of the prominent tool in computational fluid dynamics for the analysis of flows over complex geometries. The IB technique simplyfies the solution procedure by eliminating the requirement of complex body fitted grids and it is also superior in terms of memory requirement. In this study we have developed numerical code (FOTRAN) for the analysis of 2D flow over a cylinder using IB technique. The code is validated by comparing the wake lengths and separation angles given by Guo et. al. We employed fractional-step procedure for solving the Navier-Stokes equations governing the flow and discrete forcing IB technique for imposing boundary conditions. Also we have developed a 3D code for the backward-facing-step flow and flow over a sphere. The reattachment length in backward-facing-step flow was compared with the one given by Nie and Armaly. which has proven the validity of our code.