The macroscopic pancake bounce
We demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned with hydrophobic posts (Liu et al 2014 Nat. Phys. 10 515) can be reproduced on larger scales. In our experiment, a bed of nails plays the role of the structured surface and a water balloon models the...
| Main Authors: | , , , , |
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| Format: | Journal article |
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IOP Publishing
2016
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| _version_ | 1826264771296493568 |
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| author | Andersen Bro, J Sternberg Brogaard Jensen, K Nygaard Larsen, A Yeomans, J Hecksher, T |
| author_facet | Andersen Bro, J Sternberg Brogaard Jensen, K Nygaard Larsen, A Yeomans, J Hecksher, T |
| author_sort | Andersen Bro, J |
| collection | OXFORD |
| description | We demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned with hydrophobic posts (Liu et al 2014 Nat. Phys. 10 515) can be reproduced on larger scales. In our experiment, a bed of nails plays the role of the structured surface and a water balloon models the water droplet. The macroscopic version largely reproduces the features of the microscopic experiment, including the Weber number dependence and the reduced contact time for pancake bouncing. The scalability of the experiment confirms the mechanisms of pancake bouncing, and allows us to measure the force exerted on the surface during the bounce. The experiment is simple and inexpensive and is an example where front-line research is accessible to student projects. |
| first_indexed | 2024-03-06T20:13:12Z |
| format | Journal article |
| id | oxford-uuid:2b479fdc-9560-4416-896d-6f00c835a2db |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:13:12Z |
| publishDate | 2016 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:2b479fdc-9560-4416-896d-6f00c835a2db2022-03-26T12:29:57ZThe macroscopic pancake bounceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2b479fdc-9560-4416-896d-6f00c835a2dbSymplectic Elements at OxfordIOP Publishing2016Andersen Bro, JSternberg Brogaard Jensen, KNygaard Larsen, AYeomans, JHecksher, TWe demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned with hydrophobic posts (Liu et al 2014 Nat. Phys. 10 515) can be reproduced on larger scales. In our experiment, a bed of nails plays the role of the structured surface and a water balloon models the water droplet. The macroscopic version largely reproduces the features of the microscopic experiment, including the Weber number dependence and the reduced contact time for pancake bouncing. The scalability of the experiment confirms the mechanisms of pancake bouncing, and allows us to measure the force exerted on the surface during the bounce. The experiment is simple and inexpensive and is an example where front-line research is accessible to student projects. |
| spellingShingle | Andersen Bro, J Sternberg Brogaard Jensen, K Nygaard Larsen, A Yeomans, J Hecksher, T The macroscopic pancake bounce |
| title | The macroscopic pancake bounce |
| title_full | The macroscopic pancake bounce |
| title_fullStr | The macroscopic pancake bounce |
| title_full_unstemmed | The macroscopic pancake bounce |
| title_short | The macroscopic pancake bounce |
| title_sort | macroscopic pancake bounce |
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