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<p>The flow past a transversely oscillated square cylinder with respect to the flow motion is experimentally investigated using particle image velocimetry (PIV), hot-wire anemometry, and flow visualization techniques. The basic objective of the present study is to reduce the drag coefficient using active control techniques and to recognize the flow phenomenon that causes drag reduction. The experiments are carried out at Reynolds numbers (<i>Re</i>) of 295, 485, and 775. In the present study, the flow is initially controlled by an open loop method providing transverse oscillation to the cylinder at different amplitudes and frequency ratios. Finally, the flow is controlled by a closed-loop method that provides transverse oscillation to the cylinder with feedback.</p>

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Closed-loop flow control behind a square cylinder using transverse oscillation

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Manish Kumar Chauhan,
  • Sushanta Dutta,
  • Bhupendra Kumar Gandhi,
  • Bhupendra Singh More

摘要

The flow past a transversely oscillated square cylinder with respect to the flow motion is experimentally investigated using particle image velocimetry (PIV), hot-wire anemometry, and flow visualization techniques. The basic objective of the present study is to reduce the drag coefficient using active control techniques and to recognize the flow phenomenon that causes drag reduction. The experiments are carried out at Reynolds numbers (Re) of 295, 485, and 775. In the present study, the flow is initially controlled by an open loop method providing transverse oscillation to the cylinder at different amplitudes and frequency ratios. Finally, the flow is controlled by a closed-loop method that provides transverse oscillation to the cylinder with feedback.