Abstract
The wall effects on a separated flow past an elliptic cylinder are numerically investigated by a method combining the discrete vortex method with the image one. Present results for the mean drag and lift coefficients and the pressure distribution are in fairly good agreement with previous experimental data. The mean drag and lift coefficients and the fluctuating lift coefficient increase with the increase of blockage ratio, but their increasing rates depend on the axis ratio of the elliptic cylinder and its angle of attack. The Strouhal number increases slightly with the blockage ratio, but its increasing rate is small compared to that of the rectangular cylinder.
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