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Passive control of the flow around a hemisphere using porous media

Abstract : In this work, a passive flow control study is proposed in order to regularize the flow dynamics around a hemisphere at a low and a higher Reynolds number in the wake transition regime. This passive control is realized by covering the projected curved surface of the hemisphere with a porous coating. The presence of such porous medium modifies the boundary conditions at the body-fluid interface, allowing a non-zero velocity to settle in this region. This phenomenon smoothes the global flow dynamics and leads, in particular, to a decrease of the energy dissipation and the aerodynamic force. In this paper, the flow control study is carried out for several configurations using a vortex-penalization technique which allows to easily model solid-fluid-porous media without prescribing any boundary condition.
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https://hal.archives-ouvertes.fr/hal-01483400
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Submitted on : Wednesday, March 8, 2017 - 10:12:43 AM
Last modification on : Wednesday, November 3, 2021 - 7:49:00 AM
Long-term archiving on: : Friday, June 9, 2017 - 12:25:07 PM

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Chloé Mimeau, Iraj Mortazavi, Georges-Henri Cottet. Passive control of the flow around a hemisphere using porous media. European Journal of Mechanics - B/Fluids, Elsevier, 2017, 65, pp.213-226. ⟨10.1016/j.euromechflu.2017.03.002⟩. ⟨hal-01483400⟩

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