Vortex dynamics of axisymmetric cones at high angles of attack
Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requir...
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Shahriar, Al [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
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2023 |
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© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Enthalten in: Theoretical and computational fluid dynamics - Springer Berlin Heidelberg, 1989, 37(2023), 3 vom: 04. Mai, Seite 337-356 |
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| Übergeordnetes Werk: |
volume:37 ; year:2023 ; number:3 ; day:04 ; month:05 ; pages:337-356 |
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| DOI / URN: |
10.1007/s00162-023-00647-0 |
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OLC2144056242 |
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| 520 | |a Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract | ||
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| 650 | 4 | |a Axisymmetric forebody | |
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10.1007/s00162-023-00647-0 doi (DE-627)OLC2144056242 (DE-He213)s00162-023-00647-0-p DE-627 ger DE-627 rakwb eng 530 620 VZ 510 530 VZ Shahriar, Al verfasserin aut Vortex dynamics of axisymmetric cones at high angles of attack 2023 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract Symmetry breaking Vortex breakdown Direct numerical simulation (DNS) Axisymmetric forebody Force partitioning method Kumar, Rajan aut Shoele, Kourosh aut Enthalten in Theoretical and computational fluid dynamics Springer Berlin Heidelberg, 1989 37(2023), 3 vom: 04. Mai, Seite 337-356 (DE-627)130799521 (DE-600)1007949-X (DE-576)023042370 0935-4964 nnns volume:37 year:2023 number:3 day:04 month:05 pages:337-356 https://doi.org/10.1007/s00162-023-00647-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_20 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 37 2023 3 04 05 337-356 |
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10.1007/s00162-023-00647-0 doi (DE-627)OLC2144056242 (DE-He213)s00162-023-00647-0-p DE-627 ger DE-627 rakwb eng 530 620 VZ 510 530 VZ Shahriar, Al verfasserin aut Vortex dynamics of axisymmetric cones at high angles of attack 2023 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract Symmetry breaking Vortex breakdown Direct numerical simulation (DNS) Axisymmetric forebody Force partitioning method Kumar, Rajan aut Shoele, Kourosh aut Enthalten in Theoretical and computational fluid dynamics Springer Berlin Heidelberg, 1989 37(2023), 3 vom: 04. Mai, Seite 337-356 (DE-627)130799521 (DE-600)1007949-X (DE-576)023042370 0935-4964 nnns volume:37 year:2023 number:3 day:04 month:05 pages:337-356 https://doi.org/10.1007/s00162-023-00647-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_20 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 37 2023 3 04 05 337-356 |
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10.1007/s00162-023-00647-0 doi (DE-627)OLC2144056242 (DE-He213)s00162-023-00647-0-p DE-627 ger DE-627 rakwb eng 530 620 VZ 510 530 VZ Shahriar, Al verfasserin aut Vortex dynamics of axisymmetric cones at high angles of attack 2023 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract Symmetry breaking Vortex breakdown Direct numerical simulation (DNS) Axisymmetric forebody Force partitioning method Kumar, Rajan aut Shoele, Kourosh aut Enthalten in Theoretical and computational fluid dynamics Springer Berlin Heidelberg, 1989 37(2023), 3 vom: 04. Mai, Seite 337-356 (DE-627)130799521 (DE-600)1007949-X (DE-576)023042370 0935-4964 nnns volume:37 year:2023 number:3 day:04 month:05 pages:337-356 https://doi.org/10.1007/s00162-023-00647-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_20 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 37 2023 3 04 05 337-356 |
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10.1007/s00162-023-00647-0 doi (DE-627)OLC2144056242 (DE-He213)s00162-023-00647-0-p DE-627 ger DE-627 rakwb eng 530 620 VZ 510 530 VZ Shahriar, Al verfasserin aut Vortex dynamics of axisymmetric cones at high angles of attack 2023 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract Symmetry breaking Vortex breakdown Direct numerical simulation (DNS) Axisymmetric forebody Force partitioning method Kumar, Rajan aut Shoele, Kourosh aut Enthalten in Theoretical and computational fluid dynamics Springer Berlin Heidelberg, 1989 37(2023), 3 vom: 04. Mai, Seite 337-356 (DE-627)130799521 (DE-600)1007949-X (DE-576)023042370 0935-4964 nnns volume:37 year:2023 number:3 day:04 month:05 pages:337-356 https://doi.org/10.1007/s00162-023-00647-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_20 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 37 2023 3 04 05 337-356 |
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10.1007/s00162-023-00647-0 doi (DE-627)OLC2144056242 (DE-He213)s00162-023-00647-0-p DE-627 ger DE-627 rakwb eng 530 620 VZ 510 530 VZ Shahriar, Al verfasserin aut Vortex dynamics of axisymmetric cones at high angles of attack 2023 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract Symmetry breaking Vortex breakdown Direct numerical simulation (DNS) Axisymmetric forebody Force partitioning method Kumar, Rajan aut Shoele, Kourosh aut Enthalten in Theoretical and computational fluid dynamics Springer Berlin Heidelberg, 1989 37(2023), 3 vom: 04. Mai, Seite 337-356 (DE-627)130799521 (DE-600)1007949-X (DE-576)023042370 0935-4964 nnns volume:37 year:2023 number:3 day:04 month:05 pages:337-356 https://doi.org/10.1007/s00162-023-00647-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_20 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 37 2023 3 04 05 337-356 |
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Vortex dynamics of axisymmetric cones at high angles of attack |
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Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Abstract Vortex asymmetry, dynamics, and breakdown in the wake of an axisymmetric cone have been investigated using direct numerical simulation for a wide range of angles of attack. The immersed boundary method is employed with pseudo-body-conformal grids to ensure the accuracy and resolution requirements near the body while being able to account for topology changes near the cone tip. The separated shear layer originated from the surface of the cone swirls into a strong primary vortex. Beneath the primary vortex on the leeward surface of the cone, a well-coherent counter-rotating secondary vorticity is generated. Beyond a particular threshold of swirl, the attached vortex structure breaks and the flow undergoes a chaotic transformation. Depending on the angle of attack, the flow shows different levels of instabilities and the topology of the vortices changes in the wake. In addition to swirl, spiral vortices that revolve around the primary vortex core often merge with the core and play a role in developing the double-helix mode of instability at the onset of the vortex breakdown. At the angle of attack of 60$$^\circ $$, the time-averaged side force becomes asymmetric at the stage where the drag overcomes the lift. At the angle of attack of 75$$^\circ $$, the primary vortex governs the flow asymmetry and the side force. Flow asymmetry is independent of the vortex breakdown. Finally, the contribution of primary vortices to the total forces is quantified using a force partitioning method. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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