Ligament Mediated Fragmentation of Viscoelastic Liquids
The breakup and atomization of complex fluids can be markedly different than the analogous processes in a simple Newtonian fluid. Atomization of paint, combustion of fuels containing antimisting agents, as well as physiological processes such as sneezing are common examples in which the atomized liq...
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| Format: | Article |
| Language: | English |
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American Physical Society
2016
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| Online Access: | http://hdl.handle.net/1721.1/105333 https://orcid.org/0000-0002-1988-8500 https://orcid.org/0000-0001-8323-2779 |
| _version_ | 1811093571931996160 |
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| author | Houze, Eric C. Moore, John R. Koerner, Michael R. Keshavarz, Bavand McKinley, Gareth H |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Houze, Eric C. Moore, John R. Koerner, Michael R. Keshavarz, Bavand McKinley, Gareth H |
| author_sort | Houze, Eric C. |
| collection | MIT |
| description | The breakup and atomization of complex fluids can be markedly different than the analogous processes in a simple Newtonian fluid. Atomization of paint, combustion of fuels containing antimisting agents, as well as physiological processes such as sneezing are common examples in which the atomized liquid contains synthetic or biological macromolecules that result in viscoelastic fluid characteristics. Here, we investigate the ligament-mediated fragmentation dynamics of viscoelastic fluids in three different canonical flows. The size distributions measured in each viscoelastic fragmentation process show a systematic broadening from the Newtonian solvent. In each case, the droplet sizes are well described by Gamma distributions which correspond to a fragmentation-coalescence scenario. We use a prototypical axial step strain experiment together with high-speed video imaging to show that this broadening results from the pronounced change in the corrugated shape of viscoelastic ligaments as they separate from the liquid core. These corrugations saturate in amplitude and the measured distributions for viscoelastic liquids in each process are given by a universal probability density function, corresponding to a Gamma distribution with n_{min}=4. The breadth of this size distribution for viscoelastic filaments is shown to be constrained by a geometrical limit which can not be exceeded in ligament-mediated fragmentation phenomena. |
| first_indexed | 2024-09-23T15:47:14Z |
| format | Article |
| id | mit-1721.1/105333 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:47:14Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1053332022-09-29T16:09:11Z Ligament Mediated Fragmentation of Viscoelastic Liquids Houze, Eric C. Moore, John R. Koerner, Michael R. Keshavarz, Bavand McKinley, Gareth H Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Hatsopoulos Microfluids Laboratory Keshavarz, Bavand McKinley, Gareth H The breakup and atomization of complex fluids can be markedly different than the analogous processes in a simple Newtonian fluid. Atomization of paint, combustion of fuels containing antimisting agents, as well as physiological processes such as sneezing are common examples in which the atomized liquid contains synthetic or biological macromolecules that result in viscoelastic fluid characteristics. Here, we investigate the ligament-mediated fragmentation dynamics of viscoelastic fluids in three different canonical flows. The size distributions measured in each viscoelastic fragmentation process show a systematic broadening from the Newtonian solvent. In each case, the droplet sizes are well described by Gamma distributions which correspond to a fragmentation-coalescence scenario. We use a prototypical axial step strain experiment together with high-speed video imaging to show that this broadening results from the pronounced change in the corrugated shape of viscoelastic ligaments as they separate from the liquid core. These corrugations saturate in amplitude and the measured distributions for viscoelastic liquids in each process are given by a universal probability density function, corresponding to a Gamma distribution with n_{min}=4. The breadth of this size distribution for viscoelastic filaments is shown to be constrained by a geometrical limit which can not be exceeded in ligament-mediated fragmentation phenomena. DuPont MIT Alliance 2016-11-15T19:58:16Z 2016-11-15T19:58:16Z 2016-10 2016-10-07T22:00:03Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/105333 Keshavarz, Bavand et al. “Ligament Mediated Fragmentation of Viscoelastic Liquids.” Physical Review Letters 117.15 (2016): n. pag. © 2016 American Physical Society https://orcid.org/0000-0002-1988-8500 https://orcid.org/0000-0001-8323-2779 en http://dx.doi.org/10.1103/PhysRevLett.117.154502 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Houze, Eric C. Moore, John R. Koerner, Michael R. Keshavarz, Bavand McKinley, Gareth H Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title | Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title_full | Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title_fullStr | Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title_full_unstemmed | Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title_short | Ligament Mediated Fragmentation of Viscoelastic Liquids |
| title_sort | ligament mediated fragmentation of viscoelastic liquids |
| url | http://hdl.handle.net/1721.1/105333 https://orcid.org/0000-0002-1988-8500 https://orcid.org/0000-0001-8323-2779 |
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