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DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhenCHT.870
8 pages

M. Tutar
CFD Research Group, University of Hertfordshire, Hatfield Herts, AL10 9 AB, England

A. E. Holdo
CFD Research Group, University of Hertfordshire, Hatfield Herts, AL10 9 AB, England


In this paper a Computational Fluid Dynamics model is presented for the uniform viscous two dimensional flow past a cylinder oscillating in a direction normal to the flow at low Reynolds numbers. Numerical Simulations have been made to study the effect of different oscillatory boundary conditions. In the first case sinusoidal velocity slip conditions are implemented on the cylinder surface to simulate cylinder oscillation. In the second case extra body forces are included in the Navier- stokes equations resulting in a no-slip condition over the cylinder surface. Drag and lift coefficients are extracted from numerical results and detailed computations of these coefficients are made at a Reynolds number of 80 and an amplitude-to diameter ratio 0.14. The results from the present numerical approaches are found to be in good agreement with each other at low force driving frequencies below and near lock-in. However, differences are found at higher frequency ranges above lock-in. Agreement is also found with experimental results at some conditions.

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