Results of a numerical evaluation of transitional flow around a circular cylinder forced to oscillate in a direction normal to a uniform flow are presented. The cylinder is considered to be a representative of a single riser exposed to a steady current. Numerical simulations were carried out using the LES method in 2-D and 3-D with a near-wall approach that was developed without using a “law of the wall” for a finite element code (FEM). The 3-D simulations were compared with the 2-D results and experimental data in order to assess the relative performance of the 3-D LES simulations. The results show that 3-D LES gives more realistic flow field predictions and can further remove overconservatism in the prediction of hydrodynamic force coefficients. [S0098-2202(00)01103-2]

Issue Section:
Technical Papers
Keywords:
wakes, turbulence, computational fluid dynamics, oscillations, flow simulation, finite element analysis, Navier-Stokes equations
Topics:
Circular cylinders, Cylinders, Flow (Dynamics), Simulation, Turbulence, Engineering simulation, Oscillations, Wakes, Large eddy simulation
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