dc.contributor.author | Haward, Simon J. | |
dc.contributor.author | Alves, Manuel A. | |
dc.contributor.author | McKinley, Gareth H. | |
dc.contributor.author | Oliveira, Monica S. N. | |
dc.date.accessioned | 2013-06-05T18:36:25Z | |
dc.date.available | 2013-06-05T18:36:25Z | |
dc.date.issued | 2012-09 | |
dc.date.submitted | 2012-05 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.issn | 1079-7114 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/79062 | |
dc.description.abstract | A precision-machined cross-slot flow geometry with a shape that has been optimized by numerical simulation of the fluid kinematics is fabricated and used to measure the extensional viscosity of a dilute polymer solution. Full-field birefringence microscopy is used to monitor the evolution and growth of macromolecular anisotropy along the stagnation point streamline, and we observe the formation of a strong and uniform birefringent strand when the dimensionless flow strength exceeds a critical Weissenberg number Wi[subscript crit]≈0.5. Birefringence and bulk pressure drop measurements provide self-consistent estimates of the planar extensional viscosity of the fluid over a wide range of deformation rates (26 s[superscript -1]≤ε˙≤435 s[superscript -1]) and are also in close agreement with numerical simulations performed by using a finitely extensible nonlinear elastic dumbbell model. | en_US |
dc.description.sponsorship | NASA Microgravity Fluid Sciences (Grant NNX09AV99G) | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevLett.109.128301 | en_US |
dc.rights | 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. | en_US |
dc.source | APS | en_US |
dc.title | Optimized Cross-Slot Flow Geometry for Microfluidic Extensional Rheometry | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Haward, Simon J. et al. “Optimized Cross-Slot Flow Geometry for Microfluidic Extensional Rheometry.” Physical Review Letters 109.12 (2012). © 2012 American Physical Society | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Mechanical Engineering | en_US |
dc.contributor.mitauthor | Haward, Simon J. | en_US |
dc.contributor.mitauthor | McKinley, Gareth H. | en_US |
dc.relation.journal | Physical Review Letters | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Haward, Simon J.; Oliveira, Mónica S. N.; Alves, Manuel A.; McKinley, Gareth H. | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-8323-2779 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |