Abstract:
A conventional piezoelectric flag is placed downstream of D the cylinder to study electro-fluid-structure interaction between the flag and the vortices generated by the D cylinder. The energy harvesting capability and dynamics of flow structure interaction is studied. The flow patterns associated with the piezoelectric flag and the dynamic response for stream wise, span wise distances are studied. The dynamic response of the flag into different modes of vibration corresponding to different states, amplitudes and frequencies has also been observed. Simulations indicate that large energy harvesting efficiency is achieved over a range of stream wise and span wise distances and there is higher value of voltage generation when there is lock in between vortex sheet fluctuations and flag vibration. The piezoelectric flag generate more energy when there is strong interaction between vortices and the flag flutter. Large amplitude flutter and more bending of the flag corresponds to promising energy harvesting efficiency of the flag. At stream wise distances 1.2-2 and the voltage generation of the piezoelectric material is increased irrespective of the span-wise distance.
