Metastable capillary filaments in rectangular cross-section open microchannels
Spontaneous capillary flow (SCF) in microchannels occurs for specific geometrical and wetting conditions. When the channel walls form corner angles with the channel bottom, liquid filaments may form in the corners. These capillary filaments are often called Concus-Finn (CF) filaments, and they can t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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AIMS Press
2014-12-01
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| Series: | AIMS Biophysics |
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| Online Access: | http://www.aimspress.com/biophysics/article/163/fulltext.html |
| _version_ | 1818000721202642944 |
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| author | Jean Berthier Kenneth A. Brakke David Gosselin Maxime Huet Erwin Berthier |
| author_facet | Jean Berthier Kenneth A. Brakke David Gosselin Maxime Huet Erwin Berthier |
| author_sort | Jean Berthier |
| collection | DOAJ |
| description | Spontaneous capillary flow (SCF) in microchannels occurs for specific geometrical and wetting conditions. When the channel walls form corner angles with the channel bottom, liquid filaments may form in the corners. These capillary filaments are often called Concus-Finn (CF) filaments, and they can theoretically spread infinitely.In this work we consider rectangular open U-grooves of varying cross-section width, and we theoretically determine the flow conditions as a function of the aspect ratio of the channel and the liquid-solid contact angle. These flow conditions are numerically checked. Especially, we analyze the configurations where precursor capillary filaments form. We show that these filaments can be metastable, i.e. disappear into a bulk capillary flow if the proper conditions are met. A diagram of the flow regimes is deduced from theoretical developments and checked using numerical modeling. |
| first_indexed | 2024-04-14T03:25:18Z |
| format | Article |
| id | doaj.art-7f03e2c8f2aa46e6993475aa6747a7f5 |
| institution | Directory Open Access Journal |
| issn | 2377-9098 |
| language | English |
| last_indexed | 2024-04-14T03:25:18Z |
| publishDate | 2014-12-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Biophysics |
| spelling | doaj.art-7f03e2c8f2aa46e6993475aa6747a7f52022-12-22T02:15:11ZengAIMS PressAIMS Biophysics2377-90982014-12-0111314810.3934/biophy.2014.1.3120140103Metastable capillary filaments in rectangular cross-section open microchannelsJean Berthier0Kenneth A. Brakke1David Gosselin2Maxime Huet3Erwin Berthier4Department of Biotechnology, CEA/Université Grenoble-Alpes, 17 avenue des Martyrs, 38054, Grenoble, FranceMathematics Department, Susquehanna University, 514 University Avenue, Selinsgrove, PA 17870, USADepartment of Biotechnology, CEA/Université Grenoble-Alpes, 17 avenue des Martyrs, 38054, Grenoble, FranceDepartment of Biotechnology, CEA/Université Grenoble-Alpes, 17 avenue des Martyrs, 38054, Grenoble, FranceDepartment of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53705, USSpontaneous capillary flow (SCF) in microchannels occurs for specific geometrical and wetting conditions. When the channel walls form corner angles with the channel bottom, liquid filaments may form in the corners. These capillary filaments are often called Concus-Finn (CF) filaments, and they can theoretically spread infinitely.In this work we consider rectangular open U-grooves of varying cross-section width, and we theoretically determine the flow conditions as a function of the aspect ratio of the channel and the liquid-solid contact angle. These flow conditions are numerically checked. Especially, we analyze the configurations where precursor capillary filaments form. We show that these filaments can be metastable, i.e. disappear into a bulk capillary flow if the proper conditions are met. A diagram of the flow regimes is deduced from theoretical developments and checked using numerical modeling.http://www.aimspress.com/biophysics/article/163/fulltext.htmlSpontaneous capillary flow (SCF)Concus-Finn filaments (CF)capillary filamentspartial wettingopen-surface microfluidics |
| spellingShingle | Jean Berthier Kenneth A. Brakke David Gosselin Maxime Huet Erwin Berthier Metastable capillary filaments in rectangular cross-section open microchannels AIMS Biophysics Spontaneous capillary flow (SCF) Concus-Finn filaments (CF) capillary filaments partial wetting open-surface microfluidics |
| title | Metastable capillary filaments in rectangular cross-section open microchannels |
| title_full | Metastable capillary filaments in rectangular cross-section open microchannels |
| title_fullStr | Metastable capillary filaments in rectangular cross-section open microchannels |
| title_full_unstemmed | Metastable capillary filaments in rectangular cross-section open microchannels |
| title_short | Metastable capillary filaments in rectangular cross-section open microchannels |
| title_sort | metastable capillary filaments in rectangular cross section open microchannels |
| topic | Spontaneous capillary flow (SCF) Concus-Finn filaments (CF) capillary filaments partial wetting open-surface microfluidics |
| url | http://www.aimspress.com/biophysics/article/163/fulltext.html |
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