Experimental observation of flow instability control by metamaterial subsurfaces
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
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| _version_ | 1866908298540744704 |
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| author | Keogh, Melanie McTighe, Jensen Dahl, Jason Bilal, Osama R. |
| author_facet | Keogh, Melanie McTighe, Jensen Dahl, Jason Bilal, Osama R. |
| contents | Flow instabilities within a fluid flow can cause laminar-to-turbulent transition over surfaces. These instabilities can result from upstream, wake-generating disturbances, leading to increased drag and turbulence-induced energy losses. Flow control strategies can address these issues through active methods, requiring energy input, or passive systems, which operate without added input. Here, we present a passive approach to flow control using embedded phononic metamaterials to alter vortex instability development, without changing the outer-surface's texture, roughness or compliance. Experiments confirm that our subsurface can suppress vortex growth at target frequencies, demonstrating the potential for energy-efficient flow management with phononic subsurfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02053 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Experimental observation of flow instability control by metamaterial subsurfaces Keogh, Melanie McTighe, Jensen Dahl, Jason Bilal, Osama R. Applied Physics Fluid Dynamics Flow instabilities within a fluid flow can cause laminar-to-turbulent transition over surfaces. These instabilities can result from upstream, wake-generating disturbances, leading to increased drag and turbulence-induced energy losses. Flow control strategies can address these issues through active methods, requiring energy input, or passive systems, which operate without added input. Here, we present a passive approach to flow control using embedded phononic metamaterials to alter vortex instability development, without changing the outer-surface's texture, roughness or compliance. Experiments confirm that our subsurface can suppress vortex growth at target frequencies, demonstrating the potential for energy-efficient flow management with phononic subsurfaces. |
| title | Experimental observation of flow instability control by metamaterial subsurfaces |
| topic | Applied Physics Fluid Dynamics |
| url | https://arxiv.org/abs/2504.02053 |