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Hydrodynamic cavitation in Stokes flow of anisotropic fluids
Cavitation, the nucleation of vapour in liquids, is ubiquitous in fluid dynamics, and is often implicated in a myriad of industrial and biomedical applications. Although extensively studied in isotropic liquids, corresponding investigations in anisotropic liquids are largely lacking. Here, by combin...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459993/ https://www.ncbi.nlm.nih.gov/pubmed/28555615 http://dx.doi.org/10.1038/ncomms15550 |
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author | Stieger, Tillmann Agha, Hakam Schoen, Martin Mazza, Marco G. Sengupta, Anupam |
author_facet | Stieger, Tillmann Agha, Hakam Schoen, Martin Mazza, Marco G. Sengupta, Anupam |
author_sort | Stieger, Tillmann |
collection | PubMed |
description | Cavitation, the nucleation of vapour in liquids, is ubiquitous in fluid dynamics, and is often implicated in a myriad of industrial and biomedical applications. Although extensively studied in isotropic liquids, corresponding investigations in anisotropic liquids are largely lacking. Here, by combining liquid crystal microfluidic experiments, nonequilibrium molecular dynamics simulations and theoretical arguments, we report flow-induced cavitation in an anisotropic fluid. The cavitation domain nucleates due to sudden pressure drop upon flow past a cylindrical obstacle within a microchannel. For an anisotropic fluid, the inception and growth of the cavitation domain ensued in the Stokes regime, while no cavitation was observed in isotropic liquids flowing under similar hydrodynamic parameters. Using simulations we identify a critical value of the Reynolds number for cavitation inception that scales inversely with the order parameter of the fluid. Strikingly, the critical Reynolds number for anisotropic fluids can be 50% lower than that of isotropic fluids. |
format | Online Article Text |
id | pubmed-5459993 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-54599932017-06-12 Hydrodynamic cavitation in Stokes flow of anisotropic fluids Stieger, Tillmann Agha, Hakam Schoen, Martin Mazza, Marco G. Sengupta, Anupam Nat Commun Article Cavitation, the nucleation of vapour in liquids, is ubiquitous in fluid dynamics, and is often implicated in a myriad of industrial and biomedical applications. Although extensively studied in isotropic liquids, corresponding investigations in anisotropic liquids are largely lacking. Here, by combining liquid crystal microfluidic experiments, nonequilibrium molecular dynamics simulations and theoretical arguments, we report flow-induced cavitation in an anisotropic fluid. The cavitation domain nucleates due to sudden pressure drop upon flow past a cylindrical obstacle within a microchannel. For an anisotropic fluid, the inception and growth of the cavitation domain ensued in the Stokes regime, while no cavitation was observed in isotropic liquids flowing under similar hydrodynamic parameters. Using simulations we identify a critical value of the Reynolds number for cavitation inception that scales inversely with the order parameter of the fluid. Strikingly, the critical Reynolds number for anisotropic fluids can be 50% lower than that of isotropic fluids. Nature Publishing Group 2017-05-30 /pmc/articles/PMC5459993/ /pubmed/28555615 http://dx.doi.org/10.1038/ncomms15550 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Stieger, Tillmann Agha, Hakam Schoen, Martin Mazza, Marco G. Sengupta, Anupam Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title | Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title_full | Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title_fullStr | Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title_full_unstemmed | Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title_short | Hydrodynamic cavitation in Stokes flow of anisotropic fluids |
title_sort | hydrodynamic cavitation in stokes flow of anisotropic fluids |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459993/ https://www.ncbi.nlm.nih.gov/pubmed/28555615 http://dx.doi.org/10.1038/ncomms15550 |
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