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Modulation of re-circulation zone behind a square obstruction by blower-induced suction force through an array of small openings in the bed

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Abstract

This study focuses on using suction force generated by a blower at high Reynolds numbers to manipulate and eliminate the re-circulation region behind a fully submerged 2D square bluff body. A square obstruction is introduced in an open channel, followed by an array of small downstream openings. The presence of a strong re-circulation zone and vortex shedding in the wake can lead to unwanted vortex-induced vibrations, posing a risk of structural damage. The investigation explores the control of the re-circulation by the variation of both suction force and suction-panel length. Numerical simulations employ a 2-phase volume of fluid (VOF) model with open channel boundary conditions and the standard \(k-\epsilon\) turbulence model for solving momentum and continuity equations. The re-circulation zone is identified by analyzing the negative mean stream-wise velocity and visualizing it through streamline contour plots. Various suction velocities are examined to redistribute or completely eliminate the re-circulation region.

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The data presented in this study are available on reasonable request from the corresponding author.

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Funding

The authors did not receive support from any organization for the submitted work.

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Author notes

  1. S. K. Singh, S. Majumder, K. Debnath have contributed equally to this work.

Authors and Affiliations

  1. Department of Mechanical Engineering, Haldia Institute of Technology, HIT Campus, Hatiberia, Haldia, West Bengal, 721657, India

    Manas Kumar Bhukta

  2. Department of Mechanical Engineering, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chennai, Tamil Nadu, 603203, India

    Santosh Kumar Singh

  3. Department of Mechanical Engineering, Jadavpur University, Raja S.C. Mallick Rd, Calcutta, West Bengal, 700032, India

    Snehamoy Majumder

  4. Department of Aerospace Engineering and Applied Mechanics, Institute of Engineering Science and Technology, Botanical Garden Rd, Shibpur, West Bengal, 711103, India

    Koustuv Debnath

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  1. Manas Kumar Bhukta
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  4. Koustuv Debnath
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All the authors contributed equally to this work.

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Correspondence to Manas Kumar Bhukta.

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Bhukta, M.K., Singh, S.K., Majumder, S. et al. Modulation of re-circulation zone behind a square obstruction by blower-induced suction force through an array of small openings in the bed. J Braz. Soc. Mech. Sci. Eng. 46, 391 (2024). https://doi.org/10.1007/s40430-024-04976-x

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