Stochastic elastohydrodynamics of soft valves
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910910431363072 |
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| author | He, Mengfei Cho, Sungkyu Dafflisio, Gianna Emani, Sitaram Mahadevan, L. |
| author_facet | He, Mengfei Cho, Sungkyu Dafflisio, Gianna Emani, Sitaram Mahadevan, L. |
| contents | Soft valves serve to modulate and rectify flows in complex vasculatures across the tree of life, e.g. in the heart of every human reading this. Here we consider a minimal physical model of the heart mitral valve modeled as a flexible conical shell capable of flow rectification via collapse and coaptation in an impinging (reverse) flow. Our experiments show that the complex elastohydrodynamics of closure features a noise-activated rectification mechanism. A minimal theoretical model allows us to rationalize our observations while illuminating a dynamical bifurcation driven by stochastic hydrodynamic forces. Our theory also suggests a way to trigger the coaptation of soft valves on demand, which we corroborate using experiments, suggesting a design principle for their efficient operation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_08248 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stochastic elastohydrodynamics of soft valves He, Mengfei Cho, Sungkyu Dafflisio, Gianna Emani, Sitaram Mahadevan, L. Soft Condensed Matter Fluid Dynamics Soft valves serve to modulate and rectify flows in complex vasculatures across the tree of life, e.g. in the heart of every human reading this. Here we consider a minimal physical model of the heart mitral valve modeled as a flexible conical shell capable of flow rectification via collapse and coaptation in an impinging (reverse) flow. Our experiments show that the complex elastohydrodynamics of closure features a noise-activated rectification mechanism. A minimal theoretical model allows us to rationalize our observations while illuminating a dynamical bifurcation driven by stochastic hydrodynamic forces. Our theory also suggests a way to trigger the coaptation of soft valves on demand, which we corroborate using experiments, suggesting a design principle for their efficient operation. |
| title | Stochastic elastohydrodynamics of soft valves |
| topic | Soft Condensed Matter Fluid Dynamics |
| url | https://arxiv.org/abs/2504.08248 |