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- W3100503860 abstract "Abstract The paper investigates the role of geometrical asymmetric modifications of a rectangular flat-backed body on the properties of the recirculating flow at a Reynolds number $$Re=1.8times 10^5$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>R</mml:mi> <mml:mi>e</mml:mi> <mml:mo>=</mml:mo> <mml:mn>1.8</mml:mn> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mn>5</mml:mn> </mml:msup> </mml:mrow> </mml:math> . The reference model has two reflectional symmetries denoted $$s_y$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>y</mml:mi> </mml:msub> </mml:math> and $$s_z$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>z</mml:mi> </mml:msub> </mml:math> in both spanwise directions. The flow is subjected to the static instability that leads to two mirrored wake states breaking the symmetry $$s_y$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>y</mml:mi> </mml:msub> </mml:math> . Two families of geometrical variation of the fore-body and after-body are studied, each breaking one of the reflectional symmetries of the reference model. Geometrical modifications that preserve $$s_y$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>y</mml:mi> </mml:msub> </mml:math> evidence possibilities of bistable dynamics suppression although the static instability persists. Geometrical modifications that do not preserve $$s_y$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>y</mml:mi> </mml:msub> </mml:math> produces a large unbalance of both wake states in accordance to recent observations on real cars (Bonnavion et al. in J Wind Eng Ind Aerodyn 184:77–89, 2019). Results offer perspectives for potential drag reduction induced by appropriate coupling of bluff body geometry and wake state selection. Graphic abstract" @default.
- W3100503860 created "2020-11-23" @default.
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- W3100503860 date "2020-11-10" @default.
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- W3100503860 title "On the recirculating flow of three-dimensional asymmetric bluff bodies" @default.
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- W3100503860 doi "https://doi.org/10.1007/s00348-020-03083-6" @default.
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