dc.contributor.author | Palmer, Teresa Lynne | |
dc.contributor.author | Baardsen, Gustav | |
dc.contributor.author | Skartlien, Roar | |
dc.date.accessioned | 2018-03-20T09:54:58Z | |
dc.date.available | 2018-03-20T09:54:58Z | |
dc.date.created | 2017-10-11T15:08:10Z | |
dc.date.issued | 2017-03 | |
dc.identifier.citation | Palmer, T.L., Baardsen, G., Skartlien, R. (2017) Reduction of the effective shear viscosity in polymer solutions due to crossflow migration in micro-channels: effective viscosity models based on DPD simulations. Journal of dispersion science and technology, 39(2), pp. 190-206 | nb_NO |
dc.identifier.issn | 0193-2691 | |
dc.identifier.uri | http://hdl.handle.net/11250/2491214 | |
dc.description.abstract | Molecular dynamics simulations (dissipative particle dynamics–DPD) were developed and used to quantify wall-normal migration of polymer chains in microchannel Poseuille flow. Crossflow migration due to viscous interaction with the walls results in lowered polymer concentration near the channel walls. A larger fraction of the total flow volume becomes depleted of polymer when the channel width h decreases into the submicron range, significantly reducing the effective viscosity. The effective viscosity was quantified in terms of channel width and Weissenberg number Wi, for 5% polymer volume fraction in water. Algebraic models for the depletion width δ(Wi, h) and effective viscosity μe(δ/h, Wi) were developed, based on the hydrodynamic theory of Ma and Graham and our simulation results. The depletion width model can be applied to longer polymer chains after a retuning of the polymer persistence length and the corresponding potential/thermal energy ratio. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Taylor & Francis | nb_NO |
dc.subject | polymer migration | nb_NO |
dc.subject | polymer rheology | nb_NO |
dc.subject | effective viscosity | nb_NO |
dc.subject | porous media | nb_NO |
dc.subject | DPD | nb_NO |
dc.title | Reduction of the effective shear viscosity in polymer solutions due to crossflow migration in microchannels: Effective viscosity models based on DPD simulations | nb_NO |
dc.type | Journal article | nb_NO |
dc.description.version | submittedVersion | nb_NO |
dc.rights.holder | © 2017 Taylor & Francis | nb_NO |
dc.subject.nsi | VDP::Technology: 500 | nb_NO |
dc.source.pagenumber | 190-206 | nb_NO |
dc.source.volume | 39 | nb_NO |
dc.source.journal | Journal of Dispersion Science and Technology | nb_NO |
dc.source.issue | 2 | nb_NO |
dc.identifier.doi | 10.1080/01932691.2017.1306784 | |
dc.identifier.cristin | 1503853 | |
cristin.unitcode | 217,8,6,0 | |
cristin.unitname | Institutt for petroleumsteknologi | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 1 | |