Please use this identifier to cite or link to this item:
https://doi.org/10.1017/jfm.2022.418
DC Field | Value | |
---|---|---|
dc.title | Viscoelastic levitation | |
dc.contributor.author | Yunxin Su | |
dc.contributor.author | Alfonso Castillo | |
dc.contributor.author | On Shun Pak | |
dc.contributor.author | Lailai Zhu | |
dc.contributor.author | Roberto Zenit | |
dc.date.accessioned | 2024-09-09T03:40:19Z | |
dc.date.available | 2024-09-09T03:40:19Z | |
dc.date.issued | 2022-06-16 | |
dc.identifier.citation | Yunxin Su, Alfonso Castillo, On Shun Pak, Lailai Zhu, Roberto Zenit (2022-06-16). Viscoelastic levitation. Journal of Fluid Mechanics 943 : A23 1-13. ScholarBank@NUS Repository. https://doi.org/10.1017/jfm.2022.418 | |
dc.identifier.issn | 0022-1120 | |
dc.identifier.issn | 1469-7645 | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/249690 | |
dc.description.abstract | The effects of viscoelasticity have been shown to manifest themselves via symmetry breaking. In this investigation, we show a novel phenomenon that arises from this idea. We observe that when a dense sphere is rotated near a wall (the rotation being aligned with the wall-normal direction and gravity), it levitates to a fixed distance away from the wall. Since the shear is larger in the gap (between the sphere and the wall) than in the open side of the sphere, the shear-induced elastic stresses are thus asymmetric, resulting in a net elastic vertical force that balances the weight of the sphere. We conduct experiments, theoretical models and numerical simulations for rotating spheres of various sizes and densities in a Boger-type fluid. In the small-Deborah-number range, the results are collapsed into a universal trend by considering a dimensionless group of the ratio of elastic to gravitational forces. | |
dc.rights | CC0 1.0 Universal | |
dc.rights.uri | http://creativecommons.org/publicdomain/zero/1.0/ | |
dc.subject | particle/fluid flow | |
dc.subject | viscoelasticity | |
dc.type | Article | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.description.doi | 10.1017/jfm.2022.418 | |
dc.description.sourcetitle | Journal of Fluid Mechanics | |
dc.description.volume | 943 | |
dc.description.page | A23 1-13 | |
dc.published.state | Published | |
Appears in Collections: | Elements Staff Publications |
Show simple item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
viscoelastic-levitation.pdf | 986.27 kB | Adobe PDF | OPEN | None | View/Download |
This item is licensed under a Creative Commons License