Surface wakes on ultra-soft solids
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911287141728256 |
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| author | Chakrabarti, Aditi Jaganathan, Divya Haussman, Robert Mahadevan, L. |
| author_facet | Chakrabarti, Aditi Jaganathan, Divya Haussman, Robert Mahadevan, L. |
| contents | We explore the dynamical response of the free surface of an ultra-soft solid driven by a localized moving pressure disturbance. Experiments reveal a steady V-shaped wake analogous to a surface Mach wedge. A simple geometric argument provides a qualitative explanation consistent with observations. A theoretical framework combining elastodynamic, capillary, and gravitational effects yields a generalized dispersion relation that smoothly interpolates between Kelvin's theory of liquid interface wakes and Rayleigh's theory of elastic surface waves. Together, our experiments and theory reveal the existence of a soft wake regime that bridges fluid and solid surface wave physics, offering new routes for probing the dynamics of soft surfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_03123 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Surface wakes on ultra-soft solids Chakrabarti, Aditi Jaganathan, Divya Haussman, Robert Mahadevan, L. Soft Condensed Matter Classical Physics Fluid Dynamics We explore the dynamical response of the free surface of an ultra-soft solid driven by a localized moving pressure disturbance. Experiments reveal a steady V-shaped wake analogous to a surface Mach wedge. A simple geometric argument provides a qualitative explanation consistent with observations. A theoretical framework combining elastodynamic, capillary, and gravitational effects yields a generalized dispersion relation that smoothly interpolates between Kelvin's theory of liquid interface wakes and Rayleigh's theory of elastic surface waves. Together, our experiments and theory reveal the existence of a soft wake regime that bridges fluid and solid surface wave physics, offering new routes for probing the dynamics of soft surfaces. |
| title | Surface wakes on ultra-soft solids |
| topic | Soft Condensed Matter Classical Physics Fluid Dynamics |
| url | https://arxiv.org/abs/2511.03123 |