<div class="section abstract"><div class="htmlview paragraph">The laminar flow over bluff bodies having different shapes is numerically
investigated. The different bluff bodies were created by either elongating or
compressing the rear part of a circular cylinder. The growth of instability
leads to the formation of the von Karman vortex street, which is studied using
the Stuart-Landau equation. It was observed that the growth rate as well as the
saturation amplitude of instability decreases linearly with the elongation of
the circular cylinder. However, with the compression of the circular cylinder,
there is little effect on the growth rate while an increase in the saturation
amplitude can still be observed. The results indicate that a sufficiently
elongated bluff body can suppress the formation of a von Karman vortex street at
a given Reynolds number.</div></div>
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