Print Email Facebook Twitter Simulation of unsteady flow past tapered circular cylinders using an immersed boundary method Part of: ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics· list the conference papers Title Simulation of unsteady flow past tapered circular cylinders using an immersed boundary method Author Narasimhamurthy, V. Schwertfirm, F. Andersson, H. Pettersen, B. Date 2006-09-06 Abstract Three-dimensional numerical calculations of laminar vortex shedding behind a linearly tapered circular cylinder with taper ratio 75:1 have been carried out at a Reynolds number 131 (based on the large diameter and the uniform inflow velocity) using a Finite Volume code. Computations were performed on a staggered-Cartesian grid and a direct forcing Immersed Boundary Method (IBM) was used to transform the boundary condition at the solid surface into internal boundary conditions at the nodes of the Cartesian grid. Results showed a pattern of discrete oblique shedding cells, which included both vortex dislocation and vortex splitting. The local Strouhal number versus local Reynolds number curve showed excellent qualitative agreement with the experimental results reported by Piccirillo and Van Atta in 1993. However, quantitative deviations exist between the two techniques. Numerical noise (oscillations) was observed along the span in the steady flow calculation with Reynolds number 40, the reason for which has to be further investigated. The overall computational performance of the IBM proved to be very promising when compared to the boundary fitted or unstructured grid solvers. Subject cellular vortex sheddingtapered cylinderimmersed boundary methodoblique vortex shedding To reference this document use: http://resolver.tudelft.nl/uuid:120ea952-788a-4eea-948e-8abf73a467f7 Part of collection Conference proceedings Document type conference paper Rights (c) 2006 Narasimhamurthy, V.; Schwertfirm, F.; Andersson, H.; Pettersen, B. Files PDF Narasimhamurth.pdf 572.99 KB Close viewer /islandora/object/uuid:120ea952-788a-4eea-948e-8abf73a467f7/datastream/OBJ/view